How to PROPERLY Recover and Recondition a Sulfated Battery

[@evanmayer744]

good grief... to think that a 10 year old video contains a far higher amount of relevant and practical information than I can find on any modern content... this right here is what youtube is for. Thank you.

[@samsen201]

You totally read my mind. Couldn't say it better👍👍

[@ericcamolinos3740]

Pre click bait, good stuff here 👍

[@BD-ds5kg]

I have lived off-grid for 15 years and have been a ham operator for 45 years. THIS DUDE KNOWS WHAT HE'S TALKING ABOUT! The rest are hucksters! I have used an Infinitum desulphator (this is not an ad, BTW, there are other brands as well) for the last 7 years and my average system voltage has gone from 23.9v to 24.8v after about a year's use. I believe adding a desulphator is good maintenance, but it does not restore batteries. Using a desulphator to keep a battery in good condition is not magic. Remember, what he said, taking good care of a battery is what it's all about, not free lunch...This is a first-rate post! Thanks!

[@knurlgnar24]

Mad respect for living off grid for 15 years!

[@donowens5883]

@@knurlgnar24 I've had pretty good luck with my new battery charger so far

[@brianroberts5740]

" You can patent anything. It doesn't have to work. "" Greatest comment ever. What a great video. I learned A LOT. Thanks.

[@LiamComery]

This is literally not true. Most parents are not issued to brand new inventions, but in order for something to be patentable, it must be a completely new and better device than what currently exists, or, as most patents are, it must be a significant and useful improvement on a pre-existing device that is currently patented. A statement like, "Anything can be patented", is so wrong that it is hilarious. I've got a few parents, my late uncle was a patent attorney. More than 90% of patent applications are rejected. Somehow, the math maintaining that ANYTHING can be patented, vs the reality of MOST patent applications being rejected just doesn't add up. Making such broad generalizations that are based on (what are your sources for this absurd statement?) do more harm than you can imagine. Next thing MAGA idiots will be storming the US Patent and Trademark Office for rejecting Mr. Trump's application for bleach and/or Lysol IM as covid cures. It's particularly sad because the rest of your video, though 10 yo, is the best that I have ever seen regarding battery desulfation and regeneration. Please don't interpret my one negative comment as a general putdown of your entire video. It's not. It's a great and informative video in general, and years ahead of anything currently (lol) being made on YT. It speaks loudly and clearly to the immutability of electronics and physics. You have merely made it easier to understand (not easy for the typical consumer of these videos) and definitively proven that magic and wishes have no place in these situations. Keep up the good work. If you produce vids anymore!

[@LiamComery]

* patents

[@LiamComery]

* again, patents!

[@jedgurley]

Not entirely true. The physics have to be viable in a patent so if its patented . It has to be set in truth in some way.reproducable .

[@pudco]

Not only is this instructive, it's informative and explanatory. This is what the internet needs!!! I've been looking this sort of thing up for about an hour and after several youtube videos, this one came up, and I wanted to say Kudos and thanks for this informative video! I like when someone explains how and why something works. Leads to better understanding.

[@DanBrown1234]

This method works 100%! Picked up a use NIB Back UPS and when I opened it I discovered it had been unopened for 16 years. The 12v 5 mAh SLA was totally dead. Watched this video then I proceeded to fill all the cells (all were completely dry) and connect it to my bench power supply pushing it @16v. For the first 24 hours it was only drawing about 1 mA and had only come up to about 6v, at the end of the 2nd day it'd come up to 10.6v but was still only drawing 1 mA and it stayed there for 48 hours, I was beginning to doubt that this battery was salvageable. I noticed it the middle of the 4th day that it was drawing 3 mA and had come up to 11.9v (there might be something to this!) 4 hours later it was sitting @13v and as it stands now I'm draining it down to 10.5v with a turn signal bulb and it's been running for nearly 30 minutes. Amazing that I could bring a 16 year old battery back to life with this process.

[@princeinflorida214]

With what did you fill the cells? And how did the battery perform over the months since?

[@TechHowden]

@@princeinflorida214 if the cells are dry then you need to refill them with distilled water. Restoring already used SLA batteries never seems to work that well but if you do this with new ones it can work extremely well. I got a battery from a car jump starter pack which had been sitting unused for 8 years and was at 0.2 V but after charging it for a couple of days the 8AH battery puts out about 80% of the power of a brand new one and gets about 6AH of capacity. I did this about 7 months ago and the battery still works great.

[@Ed_Aylward]

Thank you for taking the time out of your day to educate us. Being that we only have about 32,000 days, or 960 months of life, if we live to be 80 years old, time is priceless.

[@knurlgnar24]

Some say life is meaningless. Some say time is priceless. Some say the 80 years we live is nothing compared with eternity. Some say live for today because tomorrow may not come. The truth is I just made this video because I have an interest in such topics and I wanted to, but I'm glad people are finding it useful!

[@Ed_Aylward]

@@knurlgnar24 I thought about putting silicone carbide powder and water in a battery and then putting the battery on a paint shaker to clean the plates off. Any thoughts on that?

[@knurlgnar24]

@@Ed_Aylward I suspect the plates would destruct from the vibration, but I think your idea is super interesting as industrial battery restorers perform similar processes (without the vibration). If you make a video showing your process and results, positive or not, please let me know.

[@knurlgnar24]

Followup for anyone interested: I still use this battery today 5 years later for various purposes. It has about 50% of its expected capacity and about 200% of the normal series resistance. It is still useful to this day which is better than being thrown out, even if it isn't as good as a brand new one.

[@MuminovicGoran]

oh wow, that's awesome

[@Oneupthesleevecustoms]

Oh man make some new videos ive missed you on the tube

[@knurlgnar24]

I've been considering starting to make videos again but it is a lot of work, time, commitment, and money. In short life and motivation have gotten in the way. Perhaps someday... Thanks for the support!

[@Oneupthesleevecustoms]

@@knurlgnar24 awesome i understand got 700 plus videos up. Takes alot of time

[@rickyid]

Hi there, not sure if I've skipped it somewhere in the video, but the time you got it charged, how long had it been with you?

[@mewantbrains]

Just restored 2 100AH scrap yard batteries Using a 20V 90W laptop charger and a 65A load using a similar method to this It took me 2 days to restore instead of 2 weeks just by changing the voltage and load Initially after charging with a smart charger and both batteries linked in parallel they would run the load for about 20 sec before the inverter shut down After recovery they ran the load for about 2 hours I let the battery voltage go up to around 15-17 volts and left it at that voltage with the laptop charger switched on for about 20 min then disconnected the charger and let it rest for an hour then drain it with the inverter then recharge with a smart charger then overcharge with the laptop charger I repeated those steps about 4 times a day for 2 days and now they are in service powering my off grid system

[@bobbyturbopants]

You da man !I will copy, but have to keep an eye on temp etc, sounds slightly dangerous

[@edwardferns]

@mewantbrains - "I let the battery voltage go up to around 15-17 volts". Hi, can you, or anyone else, explain the above sentence, i.e. what charger was used to get the battery voltage to 15v-17v. Is the foll. interpretation correct - Use the smart charger to charge battery upto 14.4/14.7.(or whatever the smart charger charges). Then immediately, use the 20v 90w laptop charger. Once the multimeter (keep checking battery terminals) shows around 15v/16v, keep the charger connected for more 20 min. Thanks.

[@ekeretteekpo3004]

Yes. I think that's what he means. A man in my area advised direct charging from a high voltage solar panel 24V (for a 12V battery) directly to the battery for about 15 minutes repeatedly, during peak sun hours. Do same for two to three days. I haven't tried it because I am not yet in that situation.

[@sometimesfirstsometimeslas4908]

This UT brought back fond memories. My uncle owned a small automotive repair shop. I worked there during a few summers while in HS. I noticed he had a bank of batteries that he had on chargers (all were dumb at this time. LOL). I asked him what he was doing with all these old customer batteries. He said he was reconditions them. I thought it odd at the time, but he seemed pretty confident that it work for some. I guess he was right. I learned a lot about cars. If you maintain the battery, rubber hoses, belts, oil, coolant, and tires even long ago most car almost never stranded one the road. And true today.

[@vicromono4799]

This tutorial is packed with the good information and zero bad advice. As a simple safety tip it should be pointed out that flooded lead acid batteries expel flammable gasses (hydrogen and oxygen) during the charging process and should be performed in a well ventilated space. Hydrogen is a lighter than air gas so common sense would say "don't do this in a closet or under a non-ventilated hood. But hey, who needs eyebrows. My old man used to tip them upside down, rinse them out, smack them with a dead blow hammer a couple of times and refill with clean acid solution. I could see the old sulfur and crud poor out and it usually helped on old farm tractor batteries. The main trick is getting the crud (sulfates) to slough off of the plates as he clearly explained in the video.

[@spyrosbellos2522]

Thank you for this tutorial Knurlgnar I tested my car battery from my car (varta d59) with a conductance tester that calculates the amps the battery puts out based on its internal resistance, it tested at 388A out of 540a. I made some tiny 1mm holes on the top and used a syringe to add a bit of distilled water in it each cell, all of them had the plates covered but each one was at a different level. I then put it in an equalising charge at 16 volts for 24 hours, then i did a discharge with an h4 headlight bulb and after recharging it it went to 432A. I just finished the second discharge cycle and i am waiting for it to charge to test again.

[@thomaskelly7780]

Well done young man! Years ago I used a similar method to restore thousands of dollars worth of batteries in building inverting systems. The charger I used was so old it actually had tubes in it!

[@knurlgnar24]

Old tube equipment is some of the best equipment! I prefer transistorized stuff myself and while work with computerized equipment for a living I ONLY want smarts in my equipment if it actually provides value in excess of it's cost and complexity drawbacks. Not everything new is better.

[@dictare]

@@knurlgnar24 Tungar rectifiers were quite popular for battery charging. A tungar rectifier is a vacuum tube diode with a low voltage drop. The cathode and filament connections came out the bottom to a screw in light bulb base. The anode connection came out the top pin. Service stations had them and in the time of battery powered radio sets many brought their batteries to the service station for charging. Of course radio dealers and repair shops also had them as well as home garages.

[@xmo552]

@@knurlgnar24 I have that battery charger. That thing alone has brought back dead batteries for me numerous times. I absolutely love that little charger.

[@garychandler4296]

I think you guys are DINOSAURS, and I'M 69!

[@sandasturner9529]

@@dictare those were the days

[@MM0SDK]

I have restored many car batteries using the old charger method and for the most part, maybe 7 out of 10, would all recover. Some were old truck batteries which take a lot longer to stabilise, but most get there in the end. My reason for needing these old batteries as a kid - C.B Radio, until i was old enough to buy a stable rectified and regulated PSU. I did miss the bubbling sound beside my bed though...lol. Some good info for cycling the batteries you have given. Info I will no doubt benefit from one day. Top vid mate.

[@speedboxx]

Thanks for this video! I wouldn't dismiss pulse charging and Epsom salts entirely. Pulse charging allows for a much higher than normal charging voltage to get through the cells to help break up the sulfation, and the cyclic nature mitigates against heat build up as well as creating small oscillations to help mechanically break up the sulfation. Epsom salts don't do anything chemically other than reducing the resistance, which helps promote current flow to also break up sulfation when charging. I am hesitant on discharging the battery completely, but the principle makes sense. People also discharge the battery, reverse charge it, then discharge, and charge it back up again as another method to "shock" the sulfation off. A combination of these methods can often help. But these methods only work when the problem is sulfation. When there's mechanical damage to the plates or if they are shorted out then the battery is junk.

[@politicalfoolsandhorses]

I am now 70 and have been charging car batteries ever since I can remember. This is the best I have seen - and kept simple too. I will attempt to explain why old chargers are best, how easy it is to make one, and a better and easy alternative to using a resistor in series or a light bulb. A method which also happens to adjust the current. My first charger 40 years ago was one which I made myself. And it is the one I use till this very day whenever the auto electronic charger refuses to even start. Very simple really and this is what all old chargers contain. In my case I chose (item 1) Transformer 230 Volts AC 50/6-Hz. to 15 Volts AC Rated at 50 Amps. (Item 2) One diode only! This converts 50 cycle AC to half wave 25 cycle DC. ie. One rectifier converts the positive half cycle (positive current) of the input signal (and stops the negative cycle of the AC) --- so you get 25 DC cycles (Direct Current) output signal ie half of them hence the current drops by approx half too. This is best for many reasons one of which is that we now have pulsating DC ie ON 15V - 0V - ON15V - 0V etc.... at the rate of 25 Per Second. THAT Is ALL !! What I use instead of the resistor is old curtain wire. You will find that if you strip the plastic covering of old curtain wire, say 3 feet, and use it as a variable resistor in series (by soldering and connecting one end to the negative of the charger - and then use a Battery Spring Clip to clamp the curtain wire left to right which adjusts the current - And it works great. However it will get hot so make sure it does not touch the car body. I normally leave this on my garage tiles floor. NOTE WHICH IS IMPORTANT. You will notice that if the battery is recovering nicely, its internal resistance starts to go down and it could suddenly start to draw much more amps than the charger can handle and even blow the charger fuse or overload the charger. Her is where the curtain wire can also be put to good use since you would simply need to move the battery clip to increase the resistance of the wire and lower the current. IN FACT ONCE YOU GET USED TO DOING THIS, IT REALLY WORKS although I repeat - it works mostly whenever a battery was unused for a long time and self discharged and NOT for whenever a battery voltage went down significantly 6V or lower, via over-loading like repeated cranking whenever a car would not start and was left discharged in this condition for a log time.

[@fenderbassix]

Understanding the physical chemistry is slightly useful and this video is good for this. After 50 years of car battery life cycle experiments I concur with the approach taken here. Cracking that sulphate layer is needed, but not so hot that the plate loses useful material underneath. That's why a pulse charger isn't so good: the plate reforming doesn't work so well with high currents so you lose capacity.

[@yankkesrule]

You said “not so hot” what is too hot?

[@truth282]

I have the foxsur Amazon charger which does indeed use pulse method. I’m trying to restore a battery that keeps dropping volts. I cleaned the cells out then added an epson salt/distilled water solution and set the charger on repair. But now I’m afraid I may have messed up using this charger

[@onetongwa]

Finally some more videos on stuff I have been doing forever. You can restore lead acid batteries and you can’t restore lithium batteries easily at home. The companies want you to spend money and keep buying more batteries or new technology. I love maintaining and restoring anything I have. Lead acid batteries are perfect for home base solar storage And I easily restore lead acid batteries with Raw solar power without the smart solar charger. I would use lithium for lighter transportation needs. People need to know the truth.

[@donowens5883]

Thankyou Reggie

[@jocelynbedard2558]

Reggie could you explain your process ?

[@ekeretteekpo3004]

Could you explain in brief how you restore your home based lead acid batteries?

[@Deceptive24]

Excellent honest video. Thank you for taking the time to make it! Exactly the no snake-oil engineering approach I was searching for.

[@ariagrippasboulevards8990]

Probably the only legitimate video on the subject. Everybody else on youtube nowadays is in love with epsom salts and trickle chargers.

[@graemes52]

Washing out with Bicarbonate of Soda major agitation, rinse, rinse then a Fill with clean water and epsom salt works a treat, Ive been doing it for 50 years. We use rainwater, not distilled water

[@knurlgnar24]

@@graemes52 Rainwater is pretty much distilled water. Rinsing the plates works but this video is about something less messy that anyone can do. I would definitely recommend filling with the proper concentration of sulphuric acid rather than anything containing epsom salt. The basic chemistry makes it very clear the battery performance will greatly suffer.

[@drsnooz8112]

Excellent video. Thank you! No hate, but I've recovered several batteries with a cheapo pulse charger I got off eBay. It's not 100% and I haven't recovered anything heavily sulfated. There also is a happy medium with it. You can't just put it on every battery and leave it. It will interfere with normal charging at some point. Even so, It has saved me from buying new batteries several times. When the dead battery is a relatively new one that was left to sit for too long, you're glad for the de-sulfator. It has more than paid for itself several times now.

[@TimothyEichfeld]

Thanks so much for the information! This is a fantastic tutorial as are your other videos on reconditioning batteries. I was struggling with getting severely imbalanced SLA Group 4D batteries back to health, (they were only 6 months old and in light cycle use) and your videos pointed me in the correct direction. What I found, and what helped me: The key is to not stop at the voltage of the 20 hour rate, but make sure the resting voltage after discharge is at the 20 hour rate. I had tried to recondition stopping at the 20 hour rate (10.5 volts in my case) but that did not work. my batteries were not improving. I tried slow recharge with 2 ohm resistor for a week, recharge at 1 volt over the upper limit (condition equalization charge) for 24 hours, charge at 14.8 volts for 2 days, 40 amps for 10 hours, nothing worked. Then I thought about what you said about referencing the spec sheet in one of your reconditioning videos and getting amps through the battery - I'm theoretically putting a ton of amps back into the battery, its not holding the charge - it wasn't even going to heat, it was just doing nothing..., so maybe I'm not discharging enough 10.5 and stopping is just not enough? That was the case. After complete discharge cycles so my resting voltage was at the 20 hour rate spec, the batteries started to improve with the reconditioning you outline. I had 10 out of 26 Group 4D batteries like this, so far I've got 4 recovering, 2 back in service. I read up on how imbalances that ultimately lead to sulfation like this can happen, turns out it is manufacturing defects! Improper ratios of the lead + active materials (tin/calcium/etc) during manufacturing causes the internal cells to become imbalanced when lightly discharged and slowly recharged. (however the manufacturer of these batteries will not refund me or give me replacements, soooo I won't ever purchase from them again) but your methodology works to bring them back into balance and back into service. I just hope I don't have to do this too often, because it is ridiculously time consuming :) Thanks for your videos! Useful and accurate information that solved my problem!

[@ErikLarsson136]

I just saw one of your battery revival attempts, try this if you have the time and effort. There's an old trick that used to be used here in Sweden for tired batteries with thick plates. The old ones didn't have as soft lead clay so what we did was; 1. Discharge the battery to less than 10%. In the end, use an iron rod or similar to completely discharge it. 2. Charge the battery in reverse polarity, make sure it doesn't get hot. - If so, decrease the current. Leave for 12-48 hours on a dumb charger. 3. Do as point 1. 4. Charge with normal polarity. (5. Small particles of lead may be present on the bottom and making a soft short circuit. If so, drain the battery, rinse it several times until clean. Fill with 32-37% H2SO4 and charge as normal. Leave on a dumb charger for overcharging for 12-48 hours.) Get back to me if you try it, it’d be fun to know the results.

[@Anorectic.Bumblebee]

very interesting where can we get back at you?

[@nwakammachijioke622]

Where do I get H2SO4?

[@Anorectic.Bumblebee]

@@nwakammachijioke622 not at all it's banned in europe

[@ManIsKind369]

@@nwakammachijioke622 you can buy battery acid (sulfuric acid) at Oreilys and autozone in the US. They come is 1 quart, 1 gallon, 2.5 gallons, and 5 gallons.

[@tedthesailor172]

Thanks for this; I'll try again. I had no idea that it might have to go on the charger for so long...

[@raymondscott4828]

This Guy is the only one that makes absolute senses about battery reconditioning. I have to say I fell for the BS put out there on Baking soda and epson salt process. I also spent a lot of money on a Battery Tender pulse charger that he states is worthless. I’m very glad I came across his video. .

[@davidjames9935]

Hello. I use a different approach. I use a laboratory power supply unit (lab PSU for short) that can output between 0 and 30VDC (selectable via knob). My model allows up to 3A maximum. It should have similar results to your method shown here but MUCH quicker. So for example let's suppose the internal resistance of the battery is abnormally very high. To compensate for that, we maybe have to initially put 20V or even the full 30V to the battery terminals but since the lab PSU has current limiting, I can set that at anything I want from 0 to 3A. Let's suppose I set it at 2A. Now it wont matter how much initial voltage I put to the battery terminals since the lab PSU will not flow more than 2A and will adjust the voltage accordingly. What usually happens on a bad battery is the voltage will start out high, then creep down as the battery takes on some charge. When the voltage gets down to more normal levels (such as 14V for a 12V battery), I can then pull it off of the lab PSU, drain it slightly to remove surface charge and to prep it for a normal smartcharger. Then just let the smartcharger do its thing. So what you do in possibly a month, I can do MUCH quicker. I agree that cycling an old battery helps the Ah capacity as even letting a battery sit in a nearly full charged state seems to somewhat hurt the capacity slowly over a long period of time. I have seen an old AGM battery that had only 48 minutes of runtime at about a 500W load jump up to 63 minutes the very next cycle cuz that battery was sitting for years (but fully charged before each drain test). Also, why burden yourself having to keep checking if the load voltage is 11.0V when you can just let the power inverter inform you when it drops to between 10.5 and 10.7 by letting it sound the audible alarm? That is what I do. I put the load on the battery via the power inverter then I go in another room on my computer and just listen for the alarm then quickly turn off the power inverter and immediately recharge the battery using my standard smartcharger. I think it is also a good idea to charge a battery at different charge rates. The idea is each different charge rate has pros and cons but it should improve the overall health of the battery to sometimes blast it with high amperage but other times use a more reasonable amperage and if you are not in a hurry, sometimes use a rather low amperage. For example, on a 100Ah AGM battery, sometimes I hit it with 25A, sometimes with 12A, and sometimes with 8A initial charge current setting. One last thing: using incandescent lamps is a very good idea for a load, especially if you live in a cold climate cuz the heat will be put to good use. However, a lamp rated at say 100 watts at 120VAC will NOT be 100 watts if powered by a cheap non sine wave inverter. Those usually have less output voltage such as 110VAC and thus the actual wattage of the lamp will drop to something like between 80 to 90 watts. I normally use a pair of 300 watt lamps but connected to an inverter, I suspect they are considerably lower such as 240 watts each. So I call the entire load (including the power inverter) about 500 watts total. The actual wattage is not critical since I use it for all the drain tests so I am just checking the relative capacity of different batteries (or of the same battery after cycling).

[@abubakarisahmuhammad7462]

hey ,if anyone else trying to find out nicad battery reconditioning try Jadonite Renovate Battery Buddy (do a search on google ) ? Ive heard some extraordinary things about it and my mate got great success with it.

[@eumesmo-kd1tr]

excellent idea, btw i did somehow same procedure like you, but the outcome after 3 or 4 cycles was one cell in short for dendrites problems, now i used 110AC line with a lamp incandecent (the old ones very difficult nowaday to get one btw) a diode bridge rectifier and the battery all in series and till now it's working but i need to do more test and check if dendrites or cell shorts, will not appears

[@veronicawilliams8056]

Here is by far the easiest method to recondition batteries: JoxCharge. com

[@ZdenekH702]

HI. can i ask if you put resistor between or not? I'm try PSU set for 2 amp and voltage raise from 12v to 16V and battery start boil inside..after few hours of charge.When I know is done? Thanks

[@Fee.1]

David James can I ask you some questions

[@bennyh7950]

After watching a few years back I have revived a few batteries using this method. What I use rather then old charger is just a small 10w panel and controller hooked up to battery until it holds 12.5 then I cycle it...after about 4-5 cycles I can usually use it again to start a car. It takes quite a few weeks sometimes longer but doesn’t cost anything to leave them hooked up on a panel.

[@andrewbrown6522]

I used to sell solar and noticed that panels without a charge controller sometimes did this with old batteries.

[@zokonjazokonja]

I actually have good experience with pulse charging, I made my own pulse source of 25 kHz frequency, and in combination with cycling i just revovered one battery from some 30% capacity to almost 80% (Ah). First I was cycling with overcharge, but I had small improve increments. Than I implement pulse charging instead my standard charger, and I keep on overcharge (battery voltage between 15-16V) for about 1-2 hours. Continue with cycling, and than it start to improve in much bigger increments.

[@QuocLe-fn8lm]

I have done the pulse charging with the same result

[@mikejones-vd3fg]

i have a16v wall adapter i kept pluggin in and out, with smooth low frequencey rythmic pulsing, i think i could hear the sulphate melt in excitment.

[@shorelined1]

@@mikejones-vd3fg lol. What amps? Did it work out?

[@mikejones-vd3fg]

@@shorelined1 I dont think so... The battery never came back, but maybe if you had more stanima you'd have better luck, i could only last a few minutes... and wasnt packing much amps like 1-2, so she never go off not surprisingly. Id like to try again perhaps with a DIY solution like zokonjazokonja did.

[@spyrosbellos2522]

​@@mikejones-vd3fg the original comment said he had a pulse frequency of 25khz that means 25000 pulses a second, i dont think you were that fast plugging and unplugging it lol

[@SuperADI2]

I really admire your honesty and your professional presentation, well done, you have a big thumb up from me, thank you so much for all the useful info

[@justinhutyler2385]

THANK YOU, after watching several videos with many differences and some, poor, explanations, I came across this one. By far, the most knowledgeable, informative, honest, and helpful video. I certainly will try this method, expecting some results but aware it may not work as i hope. Thank you very much.

[@kevinyancey958]

It's funny that I just came across this video. A few weeks ago, I decided to try recharging this car battery that I've had for years. It's been dead, in my garage, on the ground, for at least two winters. I thought for sure that the plates were trashed. So, I busted out my battery maintainer and connected it to the battery. It gave me a green light, which means it's done charging. So, to trick it into charging, I put my test light in the circuit and walked away. I came back two days later, to find it charging. I took the light out and let the charger continue. Three more days passed, and it was full. I disconnected it and let it sit another two days, before checking the voltage. It was just over 12.6, which looked good. Then, I put a small load on it, similar to what you did, with a inverter and a 90 watt halogen bulb. The voltage dropped quick, so I charged it up again, and repeated the test. It got stronger, probably enough to crank an engine over or at least run my inverter for a few hours. I've done this trick a number of times I've the years, but this was the first to a battery that sat through a couple winters without a charge, and was brought back to life! So, I too, will disagree with pulse chargers, as I've used them to resuscitate a LA battery from 0 volts to 12.6.

[@ruthcormack1765]

With lead-acid, it may be worth replacing the H2SO4 electrolyte if cells are accessible. If cells are 'lead sulphonated' then the battery equation says that some of your electrolyte will be JUST WATER. Have a nice day.

[@knurlgnar24]

The method you describe is done industrially to recondition batteries. Replace the electrolyte with distilled water, Force current through it until the pH stops falling, then clean out the cells of liquid and debris and replace with the proper concentration electrolyte. It's messy and not too practical for the average person and I've never tried it. But it is well documented that it works and forklift batteries, for example, are often reconditioned this way before being sold to their 2nd application.

[@dorntaft8278]

thank you!

[@therealjammit]

A good replacement for the 2 ohm resistor would be a headlight lightbulb. They should limit the current to about 2 amps.

[@monstercolorfunco4391]

great idea. you could try a tin can too, and any strange metals, just measure the resistance with multimeter and use a specific length.

[@pakistanis1782]

Appreciate Video! Forgive me for chiming in, I would appreciate your initial thoughts. Have you heard the talk about - Lammywalness Trendy Trade Guide (google it)? It is an awesome one of a kind product for learning how to recondition batteries at home minus the hard work. Ive heard some unbelievable things about it and my GF after a lifetime of fighting got amazing results with it.

[@KStewart-th4sk]

THAT is what he showed as a substitute if you did not have a 2 ohm resistor--- HELLO!

[@dimik3855]

Jammit Timmaj - Pay attention dumbass. I figured any 100W light bulb would do, and was impressed he mentioned that. He knows what he's talking about.

[@MikkoRantalainen]

12 V / 2 ohm should result to 6 amps, right?

[@kennethherndon7472]

Thank you . I have a habit of watching your videos for good information . Thank you again and please keep making these great videos .

[@McHdiver]

I tried your way with an optima red top that had been left too long and a 2.5 amp dumb charger. After three days I checked the battery and it read 12.75 off the charger. I left it until the following morning and it read 10.5. I then did the same thing with a infinitum pulse charge unit for two days and after that the battery read 12.99 off the charger and was at 12.34 the next morning. I've tried to charge that battery with a few other chargers. Nothing worked until I used the infinitum. The battery is now on a 4.5amp smart charger with the infinitum. The charger had previously refused to charge it. I know it's not scientific but it's pretty strong empirical evidence to me that the infinitum made the difference. Cheers

[@Bizija123]

Pulse charging may not be good enough to recover dead batteries but it has helped me rejuvenate weak car batteries. I have a top don 8 amp charger w/pulse feature.

[@LowenKM]

Very nice and straightforward, and I also appreciate the brief explanation of dubious "alternative" methods… thanks!

[@shoestringeng6473]

@ 3:10 Epsom salt is magnesium sulfate. It increases conductivity at the expense of positive plate corrosion and drastically accelerated self discharge. Keep watching for a better solution...I was shooting a video on adding the Epsom salt method that I have had mixed results with and I have to say this is by far the best way to restore a lead acid battery. Do you know if you add the Epsom salt and keep the battery on a float charger will that offset the accelerated self discharge problem?

[@MrZorbatron]

You can do this with a power supply pretty easily, too. Sometimes, that can be adventageous because you can run slightly higher voltages. Some cases of battery issues can be solved by running around 15.5-18.5 volts for a few hours until current increases, then dropping back down to 14 or 10. As for pulsed charging, it works when combined with other methods, but it has a correct and incorrect application. A capacitor-regulated pulse charging approach can be extremely effective for certain types of issues. Those little pulse devices are garbage.

[@knurlgnar24]

You're one of the few 'pulse charging' proponents I have run across who has reasonable expectations of the technology and because of that I will respond and say that I agree in general. There are applications where non CV/CC desulfation can be beneficial. I draw the line when people claim there is some sort of magic going on. All pulse charging implementations use the same physics and chemistry as constant current desulfation. I still argue that for most people CC desulfation is a better method but there are very valid arguments to be made against that claim. In any case I did publish a video that covers using a lab style power supply to do what you outline in your first paragraph. Yup. Works faster than what I show here though one needs more than a standard charger to accomplish it.

[@freeamerican6784]

This is a helpful video. Nice to see an educational video where the "comments" and "questions" section isn't disabled as i've seen in other videos.

[@tashabaird5771]

I like this guy’s style. He knows his shit and dgaf what you think of it.

[@whoozbi]

I work for a large industrial battery company and we have pulse chargers but we do not promote that they are better at desulfation which in my experience of two years they do not but the pulse charge is promoted to save electricity costs for people with many batteries to charge daily. Our guidelines for desulfation require a steady low amperage charge for 48 hours and then put them on a load bank to test for bad cells.......sometimes repeating the process two to three times to fully desulfate. This guy knows what he is talking about.......any other way is a gimmick or quick fix.

[@busterbennett1]

whoozbi 9*

[@davidjames1684]

Your statement is ambiguous. A combination desulfator/charger will attempt to desulfate as it is slow charging but they also have higher amperage desulfators for large capacity batteries (such as 100Ah or more). How do you know for certain that a desulfator is not any better than slow charging?

[@rubendelacruz3301]

I did the distilled water with Epsom salt mix after emptying out the old acid and cleaning the inside with baking soda and distilled water the rinsed it out with more water after filled it up with the mix and to my surprise it actually worked so far its been good for some months

[@polarlab113]

Very bad idea.mixing foreign chemicals with an acid is like a kids chemistry set.you are playing with avid for dad gum sake.and baking soda is a neutralizer.unless you can get every scrap of it out of the battery you will in effect neutralize your electrolyte in short order.

[@knurlgnar24]

The plates are actually made of a hard lead mesh impregnated with a soft lead paste. Scrubbing would remove the paste, and to get them apart you would need to cut and re-cast the lead straps holding the plates together. A better way to clean them is to empty the electrolyte, replace with distilled water, and charge. empty, charge, repeat, etc. Then refill with the proper ph acid. This will remove nearly all of the sulfation, whereas this procedure only removes some of it.

[@rogercoffin4120]

K

[@Seriouslydave]

what about ultrasonic? or sticking it on the washing machine for a while..

[@novaknovakovic1585]

Nice Video clip! Apologies for chiming in, I am interested in your initial thoughts. Have you considered - Lammywalness Trendy Trade Guide (do a search on google)? It is a good exclusive guide for learning how to recondition batteries at home minus the headache. Ive heard some pretty good things about it and my buddy after many years got astronomical success with it.

[@spartanworria]

Load of rubbish

[@nickbarret9368]

Hi , Have recently got a set of 600AHr OPzS (6 x 2v cells) that were in good service for 2 years and were decommissioned simply because the PO went on grid. Unfortunately the PO removed the acid to make them easier to move:-( That's how they came to me. The airtight caps are on. Some slight visible white fluff here and there. Do you recommend anything I could do before I (re)do the commissioning procedure, e.g. add acid and CC charge at C/20 till I reach 2.75 VPC/or no more increase in voltage and no rise in SG for 3 hrs after maxing out on the voltage? I would think that the above could only help. What kind of charging current would you recommend with the distilled water? Anything else? It's a really a beautiful set and it be a shame to toss regards, Nick

[@g0fvt]

I have recovered various varieties of lead acid batteries over the years, from my experience it sometimes helps to get a fairly high voltage across each cell, obviously this can lead to localized heating if part of the cell is in partial recovery. This is a merit to pulse charging, to get fairly high peak voltage but with a low duty cycle the heating and localized gassing can be minimized. A GE publication many years ago regarded sulphation as a reversible failure but also suggested current limited charging that could reach about 11v per cell. In my experience conventional wet lead acids will recover after many years of neglect, other types are more tricky. Obviously not all failures are reversible!

[@larrymclain]

Right.. proper battery maintenance is key. Learning about batteries is very important because how the battery is used will for sure extend the life cycle. A car battery is designed to stay fully charged unlike a cellphone battery is designed to be fully drained and fully charged and once the cycle is started the battery will last longer. Here’s another example like a power tool battery (Milwaukee ) fully charge it and the first time the tool stops working because of the battery getting low, it needs to be fully charged and not drained below the threshold or so low the charger won’t charge it because of the voltage being too low. You guys probably know all this stuff but I’m just sharing what I know about batteries and hopefully it’ll help someone else. Great educational video!

[@exinnov]

I filled my sulphated deep cycle batteries used for my inverter with additives and it has lasted about 4 month with good result. Before I did that it would only hold charge for 30 minutes, but now it has even recorded 8 hours.

[@letusmakemaninourvanity1366]

I used Epsom salts and it works. This summer the battery in my van started dying. It would barely crank over. I charged it and only got a few starts out of it during warm temperatures. I charged it again and left it in the van overnight and the temps dropped to 45 degrees overnight. It lost it's charge and wouldn't start. Just clicked. Since I have another van I left it sit for weeks while I researched how to revive a car battery. I stumbled onto a blog about Epsom salt. I removed about 1/3 of the acid using a turkey baster. I heated up a half gallon or so of distilled water on the stove until hot and kept adding Epsom salt a quarter cup at a time until it was ridiculous. Stirring it the whole time. The solution was slightly thicker than water but it was totally clear. I filled the battery, put the caps on and shook it good. I charged it on an old charger for 48 hours. I let it sit for a day and it slightly discharged. I charged it again for 24 hours. The temperature outside is cold. This is Wisconsin. The van has started every time over the last four days and today the temp is 21 degrees. Today the van started like it's a new battery. The battery is FIVE YEARS OLD. Just a month or so ago it was crap.

[@blairbushproject]

Okay so after you add the salt and distilled water and shake. You go straight to charging. Do you leave the epson salt solution in there permanently?

[@letusmakemaninourvanity1366]

@@blairbushproject Yes. The Epsom salt stays in there for good. The battery still works great one month later. Like new. Just be careful with the acid when removing it and handling it. Wear eye protection and have water nearby to rinse it off if you get some on you. I used a suction device with a tube attached and stored the acid in a plastic milk bottle.

[@letusmakemaninourvanity1366]

@Frank DeFalco It was an experiment with Epsom salts. I had some. I tried it. It worked.

[@denstump4590]

@Frank DeFalco The acid is not the problem, changing acid does nothing to remove the sulfation on the plates.

[@7_red24]

Please do a short series of videos all about automotive batteries. I'd pay to watch them. Your knowledge is unparalleled.

[@parkertwentyten]

I agree that this process takes time, but it is worth it in my opinion. You have essentially explained what I do when messing about with rechargeable batteries. I have never tried additives and found this method has a high success rate with batteries showing around 10 volts. Some of them were only half full of electrolyte when recovered. I use the ones recovered to form a reserve energy source when the Hurricanes hit and the power is out for a few days. (After my generator runs out of fuel.)

[@calvinavilez7234]

Right 4

[@calvinavilez7234]

Ni

[@andygeorgiou2846]

Ok this is THEE BEST VIDEO ever out there on restoring lead acid batteries!! Well done!! Thank you.

[@johnfixit1046]

Nothing ventured nothing lost right? I've done this before myself, usually just to eek a little more life out of a battery that was junk otherwise. Another old trick was to 'drop' the battery a few inches a half dozen times, letting it settle for 30 minutes, then overnight charging it. Also worked a couple times. Side comment, I am in love with this guy! I love the geeky needy guys, they are just great!

[@belvederewdtv]

Good video. Tried this with a couple of small (3 Ah) APC UPS batteries I was going to toss out that have been sitting around for years. The APC doesn't maintain the battery properly and so the batteries die after standby use with hardly any cycling. One was bone dry. Topped off with tap water (very soft water here). One battery took a charge, the bone dry one did not Got 8 seconds while running the inverter under load. Tried this a few times without improvement. Then tried an Everstart marine charger with de-sulphating mode a couple more times and got it up to 5 minutes, which is what APC is the run time on these small paper-weight UPS. Not really worth it for a $15 battery but an interesting proof of concept, both for the battery and the marine charger.

[@derekinbritishcolumbia1449]

A resistor can be made with simple SS wire wrapped around a non-conductive core. You can use an ohm meter to confirm the number of turns. I used .024 SS aircraft lock wire for one I needed to replace a blown power resistor on an automotive cooling fan.

[@kazparzyxzpenualt8111]

Does SS wire just stand for stainless steel wire?

[@anthonyvolkman2338]

I have used this method before in the past (and still do) and it works well the the most part. Excellent video.

[@JBHChannel1]

It's nice to see so many people who are into battery culture.

[@pedrotalavera3541]

A battery that was $60 in 2013 is probably twice or more now. Great video. thanks for sharing

[@knurlgnar24]

I use my DLS-45 as you describe and it works well for it. 45A is faster than optimal for charging batteries but I haven't had a problem with outgassing or overheating even when charging single batteries. You just have to watch them more closely and it's best to not start with a warm battery. It does start tapering fairly early on in the charge cycle so it's not like it does 45A the whole time - probably just the first 20 mins or so on a normal deep cycle battery.

[@mohamedyoussefskaik]

I made a highly concentrated epsom salt by filling one cup of epsom salt then mixing it with a little bit of water, then i emptied the battery electrolyte, then added the epsom salt to one of the weak cells that was not bubbling while charging but i didnt charge it affter adding the salt, i just poured the salt into the dead cell, i left it for 24 hours, and now it is accepting a charge and bubbling, then i emptied the epsom salt, gave it a rinse and added the sulphuric acid electrolyte again, now it is reaching 13v

[@samspianos]

next step moon!

[@alanpetersen4615]

One of the best, no SHIT, video that I have seen. I loved it!

[@stevenperry4691]

I have never charged a dead battery before, I have 2 ,12v batteries for my Grandsons electric bike, exactly what you were doing, after watching your video I got my 12v battery recharged. Thank You 😎

[@Grandassets]

I have 18 of those Telco batteries I have just gone through them and equalized them, when they were removed from service they sat for a few months when I got them from the tower they were all 12.2v but I did the same steps of draw down and recharge, I have both of the chargers you do and I like the computerized one, it has a settings for deep cycle and AGM, I noticed when you first put it on it tests the battery and brings it to 15.5v then slowly brings it back to 13.5v and will keep it there in accumulation phase I have a lot of 145AH telco batteries too, I ran a 1000W inverter on One for 6 to 8 hours running lights and a desktop computer and it was only draw down to 12.1, so I could see one running a hunting cabin on solar by itself :) I did put one on four of my 100W panels and charged and used it at the same time, but if people wanted to save $100s a Deep Cycle Marine battery will do about the same thing at 100ah

[@HorizonsUnlimited]

I have found that although the battery voltage may reach a fully charged state, once I performed a load and capacity test, the battery was quite down on the specifications. I used a Power Products analyzer for a load test and a Torkel 860 for the capacity test. Finally a battery video that makes sense considering all the BS found on KZbin and forums. Having worked in a battery lab, I have yet to see any charger with a so-called desulfation mode that works. And the key to long battery life is care and maintenance. My car batteries have all lasted over 15 years and I also choose a flooded lead acid battery because they can be maintained.

[@joecox9958]

you are right, see voltage drop quickly as he measures, means self-discharge is high. watch is ok, but use old or new acid.

[@charliehull1326]

Let me say this a flooded battery can always and i do mean always be brought back to like new if not better than agm not as easy or cost effective but can be brought cback there is no such thing as a bad battery my friend if you going to state truths state em truly i may not have your college degrees but i have an uncanny ability to grasp the flow of electrons stereo systems is what got me into it but there are many ways you can completely revive a completely crystallized cell if not there would be no value in a core return battery companies dont want you to know but if you have knowledge of how it works you can remove led add led remove electrolytes and fresh change metals change electrolytes for about 1/3 the price of a truly brand new battery. CAUTION PLEASE DO NOT ATTEMPT TO TAMPER WITH A FACTORY SEAL FOR MEANS OF RESTORING YOUR BATTERY UNLESS YOU KNOW THE DANGERS INVOLVED AND HAVE ALL THE PPE AND SAFTY EQUIPMENT

[@chriskennedy7534]

@@charliehull1326 But you shared absolutely no infomation on how to do anything. Talk is cheap.

[@jornjacobsen3945]

Thanks. Just got handed a treasure trove of batteries and already finding some good ones. This method may help me get the most and the best out of the pile. I'm actually looking for several with a decidedly dead cell or two, reducing the voltage to 8.1 to 10.4 that can be used to run transmitters requiring that voltage range. Ah rating can be also reduced as the transmitters are low power. Tired batts can also be used for lighting and other appliances not voltage sensitive or appliances that designed to operate at a 'failing' batteries maximum voltage... Get creative!. To the heckler, Yes, I do in fact plan to go to MARS and will need this information. There i will likely find a colony of vulcans and fellow geeks. We will gladly watch from a far as the earth denigrates. Have a nice time.

[@jono2313]

Damn dude ur good at the whole information conveyance thing. Thanks

[@warren52nz]

Good video. I have a "Plan B" if you can get hold of sulfuric acid. I managed (with a bit of difficulty) to get 2 litres of 98% pure sulfuric acid (H2SO4). I had a car battery that was rated at 45 Amp-Hours and at 6 years old it could only deliver 0.4 A-Hr (at 6 amps). I put 6 ml of pure sulfuric acid (if you're American you'll have to convert, sorry, we haven't worked in the imperial system for 50 years) into each cell and charged it up and it immediately produced 11.14 Amp-Hr (discharged to 12.12 volts so it was actually a bit better than that if I'd let it drop further). After a week it measured only 7.93 Amp-Hr so it's declined but it's still much better than it was. It has a desulfator electronic circuit on it that puts very high voltage pulses into the battery 1000 times a second and I'll leave it on for a month or so. I built it from scratch years ago and even if it does nothing I'm sure it won't hurt it. Time will tell if this method (adding H2SO4) will permanently increase its capacity but I think it probably will. If you plan to try this read up on how to handle concentrated H2SO4 before you start, it's dangerous!

[@skisandkeys522]

this video helped me recover both of my optima batteries ! I could not do it with smart chargers. Smart chargers could only get me to 12.5v resting - with a 10 AMP manual charger and a few weeks of patience I have both batteries at 12.8v. Thank you !

[@braselectron]

Excellent tutorial and very professional.

[@carmenwest2413]

It`s surprising how easy this reconditioning steps are t.co/Folp6e7Dkc ! My auto batteries, cellphone battery, drill battery, camera battery, along with other forms of batteries are all repaired and useful again! Since starting this program I have ended up saving over $ 400 on batteries!?

[@JonAhlquist]

Summary to help locate details in video. 0:00 How to identify when rechargeable lead-acid battery is failing. 2:34 Two "recovery" methods that knurlgnar24 does not recommend: (i) adding chemicals to the cells and (ii) pulse charging. 3:40 Introduction to recommended 5-step procedure. Equipment needed: Non-smart (old) battery charger, low-ohm resistor (such as an incandescent light bulb), voltmeter, and clamp ammeter capable of measuring at least 5 amps. 5:14 Step 1: Connect non-smart charger through a low-ohm resistor to the battery. [Be careful where you put the low-ohm resistor. It can get hot if the battery starts to accept more current.] 7:48 Step 2: Monitor current until it rises to and stabilizes at 1-4 amps. Add distilled water [carefully!] to keep battery plates covered if possible. It may take up to a month before the charging current stabilizes at 1-4 amps. If it never reaches 1 amp, the battery is not recoverable. Buy a new battery and recycle the old one. Some vendors will pay you a "core charge" credit if you return your old battery to that vendor. [Determine details before purchase.] 8:20 Step 3: Assuming charging current stabilizes at 1-4 amps, leave the charger connected for an additional 48 hours. 8:42 Step 4: Disconnect the charger, wait 24 hours, and measure the battery's voltage. If not 12.5 V, reconnect the charger for another 48 hours. Repeat step 4 as needed to bring the voltage to 12.5 V after 24 hours of no charging. If you still can't get 12.5 V after a week or two of repeating step 4, recycle the battery. Successfully passing step 4 means that the battery is desulfated. 9:50 Step 5: Cycle the battery about 5 times by partially discharging through a load and recharging. 13:23 Final comments

[@lizwilliams6120]

If your really need a resistor but dont have one you can make one out of a pencil clip lead to sharp end then cut into pencil a few spots exposing the graphite to what you want the resistance to be using a multimeter then clip the other lead to exposed graphite then to battery I know it works because ive charged smaller batteries using this method 👍

[@PeterHelenefors]

Man, I can watch this video over and over! Thanks so much for sharing!

[@greatalberto_tech]

Thank yoh for your honest opinions in your presentation. I think pulse chargers also have their place if they are properly utilised. I'm planning of building a diy version of that, and I will share the results if I do.

[@eno5094]

Between all the video i wayching about reconditionning battery i just watch the right one with the right step by step. Thank you

[@jusb1066]

excellent common sense approach without all the snake oil that many try to sell

[@brianwenzel8791]

I'm sorry, but this is not how a car battery works. Electrons "electricity" are forced into a battery by a charger, then the lead plates transfer the charge to thee acid. The acid holds the charge, not the plates, the plates are only there to transfer the charge. What happens is the lead plates over time get a build up of sulfur deposits which prevents them from transferring electricity. The way to fix this is drain the acid, split the top of the battery apart from the case, thee lead cells are mounted under the top, that's what really needs to be cleaned, with something abrasive, like a wire brush, and or sand paper between the plates. But, this is not recommended, unless you're dead broke. Most people will prefer the convenience of buying a new one.. Less hassle, less dangerous, less worry. Everything now days is designed with whats revered to as Obsolete Engineering, meaning, its only meant to last for so long, then you need a new one. Nothing is built to last anymore. The same goes with battery's. Sorry to say..

[@belgumfamily9288]

I am not sure "Snake Oil" is the refference you want to use... This reference to an american named Clark Stanley in the 1800's who patented and sold to the public snake oil for health benifits. The true issue of the story was that Chinese water snake oil actually does have health benifits. That man used a rattle snake for his demonstrations but didn't actually have snake oil in his "medicine". His product had cow fat and turpentine, No Snake Oil. Snake Oil actually works! LOL

[@JDUBZZZ]

Thank you! I'm glad your blunt Abd straight forward. Love your videos!

[@videopipeline6419]

@6:28 "we have almost zero current; about .1 amps going into our battery, and that's pretty typical of a sulfated battery." @6:51 "what you'll see on most batteries that have sulfation problems like this one does, is that the current will start out at a very low level..." These describe a key point, which helped me tell the difference between batteries that failed due to sulfation, and batteries that failed due to a buildup of a conductive layer in the bottom of the battery that eventually touches the bottoms of the plates, causing internal resistance to rise, which requires more amps to recharge to full voltage because more of the charger's electrical output being converted to heat (i.e.: the battery heats up a lot more than normal). As you mentioned, heavily sulfated batteries typically have poor charge acceptance (i.e.: the charger doesn't put out much current and the battery doesn't heat up).

[@homayounshirazi9550]

I am glad you emphasized the futility of restoration of a sulfated battery by pulsatile means! Snake oil analogy for those eager to pay for it!

[@TheRadiastral]

It's surprising that you dismissed pulse charging completely. I've been playing with bedini circuit for a couple of years now. I got most of the batteries I used in those projects from scrapyard - all sulfated badly I'm sure, they were dumped. I had only one small 4.5 Ah brand new to have something to compare amphours. Well, contrary to what you say, I managed to successfully restore (partially of course) all of those. I didn't have an actual 12V charger to compare with, but even if it did better, clearly the HV pulse charging worked just fine. At least it did for me. Did you not try the SSG circuit? It does charge pretty damn well.

[@screamfingers]

You speak good sense really helped me out thanks!

[@tonypeeler3070]

I love the free harbor freight volt meter..the ones they cant even give away..lol everyone has had one of those

[@norkagonzalez3408]

I have spent months researching into fixing a car battery and discovered a fantastic resource at Jons mender guide (google it if you are interested)

[@mixerguru]

yes i have one works fine

[@hxhdfjifzirstc894]

The probes are very delicate. They break easily. I guess I'll get a new free volt meter, LOL.

[@chocolate_squiggle]

I have about 6 multimeters of various qualities, but I still want a free Harbour Freight one - just because it's both cool and ridiculous that they give them away lol. But alas I live in New Zealand.

[@christopherleubner6633]

What I have done on several dead lead batteries is, give each cell 4 to 12cc of concentrated alum in boiling hot distilled water, charge the bejesus out of it with a dumb charger, then finish with a smart one. The alum modifies the crystal structure of the sulfate to allow it to take a charge and new sulfate formed is more porus so it gets better with time.

[@ChristopherMerriman]

Great advice delivered without BS and with humble qualifiers.

[@knurlgnar24]

Battery construction quality is a very large contributor to battery life. It it is designed for a 5 year life then you're unlikely to get much more than that no matter what you do. But, yes, keeping them cool and at a proper float voltage is about all a person can do as you mention. Periodic equalization is sometimes helpful depending on battery type, and true deep cycles also benefit from a light partial discharge every few months because it helps them to shed corroded plate material.

[@jocelynbedard2558]

Reggie. Could you explain your process ?

[@shaunbarnett2972]

I filled my battery up with Irish Whiskey. It didn't recover it but it had a fantastic time.

[@katysmith1641]

Here's the best method for reconditioning your old batteries: HootBattery.xyz

[@mick2d2]

Thanks for the video. I realise this video is a few years old, so maybe smart chargers have improved since it was made. I don't know about snake oil, but I have just recovered a 12v battery off my scooter with the desulfation mode on my smart charger. I had to repeat the process six times before it brought the voltage to a properly charged point. It started at 13.2v "fully charged" Now it's reading 14.3v.

[@waltp3373]

If you don't have a 2 ohm resistor, you can attach 5 10 ohm resistors in parallel or 10 20 ohm resistors, etc. I have a Schauer battery charger similar to the one in your video. I've had that forever. It still works. Thanks for the video. It was informative.

[@nwakammachijioke622]

Why do we use resistors here?

[@leebatt7964]

@@nwakammachijioke622 current limiting.

[@namanjain6445]

What voltage 2 ohm resistor should I be using? I got a 50v and 100v one..they look much smaller compared to the one used in this video.

[@Omegadoomship]

I’ve tried this and it works. This method is only worth doing if you are trying to revive expensive industrial batteries such as fork lift batteries. Car or truck batteries just aren’t worth the time. Time is money and they are cheap enough to buy one and move on with your life. However I have tried it on motorcycle and lawn tractor batteries just to see if I could do it and it does work most of the time. Those batteries tend to sit around longer unused for periods at a time in most cases. They are more likely to become sulphated because of this so it might be worth a try if you want to save a couple bucks. Remember that batteries naturally wear out over time and this technique won’t help you if your battery is plain worn out or really old. By that point you’ve got to bite the bullet and buy another battery.

[@knurlgnar24]

Agree. Most of the time for most of the people buying a new battery makes the most sense. But if one is inclined to tinker with such things and has a process set up it takes very little in-person time and can restore batteries with little time resource commitment assuming someone is doing a fair number of batteries.

[@benlouw1252]

Thanks, nice style of presentation and you seem to know your stuff. I'll definitely give it a try.

[@rafael55]

Now I know to just buy a new battery. Thanks. (I was going to buy a pulse thing.)

[@maxwellgqosha7301]

Look ok o mk ok o I'm

[@maxwellgqosha7301]

Lovely lovely km km long NM po ohkmo look kill kloof Hi pip

[@MAGICMASON20]

Excellent! Found it very informative! And no bull shit! Loved the video!

[@brianhind6149]

It is refreshing to watch & listen to your video. The incredible videos that are a compendia of lies, misinformation, & just plain nonsense , are ubiquitous on the net. I would have thought that most adults were topically familiar with the chemistry of a lead/acid storage battery. Thank you for revealing the FACTS !

[@stefantrethan]

Appreciate the no BS video. There is a good book online: "THE AUTOMOBILE STORAGE BATTERY ITS CARE AND REPAIR 0. A. WITTE". It was written in 1922 and the information is still valid today - the technology barely changed.

[@cshriv]

Great video, I have really enjoyed watching it. I have also watched your entire series on making a sine wave inverter from an old UPS which I intend to use for an old UPS I have. I appreciate the level of detail that you go into, and although some concepts and ideas may go over my head I feel like I'm really learning some things which is not always the case on the Interwebs today! Question: Have you tried this method on multiple batteries at one time, or is this only useful for a single battery at a time? I have a great deal of SLA batteries that I would like to recondition, some of which are really dead, some only "mostly dead" in the words of Miracle Max. Any tips would be helpful, but my end goal is to recover enough to use with the UPS and convert into a working solar generator with battery bank backup. Thanks!

[@deangermeten5629]

Other reasons why batteries fail (other than sulfation): lead falls to bottom and shorts out the cells or the inside connection to the terminal fails (the latter is unrepairable.) As for the lead settling, this can be drained off if the batteries have caps. And additives can work. Baking soda will attack the sulfation, creating sodium sulfate and carbon dioxide (which bubbles off.) Another method is adding ammonia to the cells and charging backwards for a few minutes, then dumping the solution and refilling with sulfuric acid water, ammonium or aluminum sulfate. Charge as normal, you're done.

[@ds-nb4ln]

hey ,if anyone else trying to find out learn how to recondition batteries at home try Trefendous Rapid Extender Tips (should be on google have a look ) ? Ive heard some awesome things about it and my mate got amazing results with it.

[@klystron44]

Good someone mentioned the remains falling to the bottom and shorting the plates.

[@albertmagician8613]

The addition of baking soda will replace acid with a Na2SO4 solution, permanently detoriating your capacity. And no if you have leadsulphate paste and add baking soda to it, nothing happens.

[@kgsalvage6306]

I watched this video when you first uploaded it. I agree with you totally on chargers. The older ones will get the voltage above 15v which is critical to desulfinate the plates. What are your thoughts on the newer thing, capacitance chargers? I'm tempted to experiment with one.

[@knurlgnar24]

I look for whitepapers and academic research on battery charging technologies from time to time and the reputable information I find has always debunked any complicated charging technique analyzed. A simple constant voltage is best. BTW, I went through my batteries again just a few months ago and for some reason this battery has now recovered to about 90% using this technique a 2nd time. (I used an electronic load for discharge and a lab power supply for charging, but the technique is the same as the 'cheap' way presented in this video.) Perhaps being on a low float voltage trickle charge for the last few years while not in use helped it out.

[@knurlgnar24]

correction, constant voltage or constant current depending on the details. Either one can be valid depending on the circumstances.

[@malulsos]

The battery in my wife's car recently died.. checked with my multimeter and it was sitting at 11.4v, down to 6 or 7v when turning over the engine. attempted charging on a 20 year old "charge and maintain" charger that was my dads; that didnt work as the charger clicked over to ready after about 30 secs without actually charging... so bought a 9 stage smart charger that has a reconditioning mode and received it today.. its on it currently and the charger has recognised the battery is "low" and further during the pulses my multimeter is showing 15.41v for about 15-20 seconds then dropping back to 13.5ish volts before immediately climbing again and repeating the process. I guess ill see tomorrow how it's gone 💁 but as far as the reviews go these cheap multi stage chargers these days seem to have a reputation of working well at reviving dead batteries. I'm guessing the technology has advanced a bit since you made this?!

[@kgsalvage6306]

@@malulsos I'm curious how that goes for you. If possible, keep me updated.

[@corneliusbulik9750]

I just restored my Chevrolet S10 pickup battery, which became useless, and now works like new. Now is winter; I am in Gaspe, Qc., Canada, and the temperature is badly low - 18 Celsius. This is in few words what I did: Empty the battery into a clean bucket (for later use) rinse the battery with distilled water (could be clean snow melted or rain water) and shake well several times, until the water comes out clean (much black deposit of lead sulfate came out) take 550 ml distilled water at 65 C degrees, add 220 g epsom salt put 85 ml of this in each cell complete with electrolyte above led plates put to recharge for at least 24 hours at 12 V 10 A. It worked for me

[@corneliusbulik9750]

The explanation is that the lead sulfate crystals formed on the lead plates block the redox process. Rinsing and shaking the battery helps to take out much of these crystals. Adding Epsom salts (magnesium sulfate), helps to clean further the lead plates, because magnesium enter in competition with lead for the sulfate radicals, and magnesium being more reactive than lead, helps to clean the lead plates. Ideally, after recharging, and few days of utilization, clean again your battery - eliminate all the deposits, and refill with pure electrolyte.

[@johnwagner8465]

Thanks for taking the time for the video...I'm going to give it a try..thank you

[@gewgulkansuhckitt9086]

I don't have the patience for this. I'm just going to zap it with an electric cattle prod and see what happens.

[@ChatGPT1111]

Styro Pyro does this!

[@warrenphillips69]

Use a glow rod, be well!

[@DougHanchard]

It's too bad the construction of most deep cycle batteries do not allow for the removal of the top of the case with standard tools to remove the lead plates, clean them (desulphate) , add new water and acid and put the battery back into service.

[@garnettbingham5234]

Doug Hanchard

[@javaman2883]

That would be too much liability. Then somebody could open their battery with little effort, spill acid on themselves and their dog, then start a lawsuit against the battery manufacturer and the auto parts chain that sold it to them, plus PETA would start a class action lawsuit because the person's dog was inhumanely harmed by the negligence of the all battery manufacturers that used that type of battery construction. Lawyers would make a ton of money.

[@denstump4590]

@@javaman2883 How true How True, but you also forgot to mention no battery company would want us to be reparing batteries even if we could because everytime we repair something they think they lost a sale!!!

[@ExStaticBass]

This get's me to wondering if a simple 555 timer circuit driving a MOSFET would be useful. It occurs to me that a high current pulse at a low rate would work fairly well. This is something I've been thinking about for a while. I'm curious as to what you think about the idea.

[@ekeretteekpo3004]

This sounds like something Bedini did with his SSG charger.

[@thewileyone1]

The guy who posted this video thinks pulse charging is voodoo. I disagree. But neither of us has offered any proof. Sorta like astrology.

[@markthomas4083]

Thank you for this clear, instructional video. Time to hit the garage now.

[@Sevalecan]

EDIT before posting: I just saw your link to the new video with new equipment, I see you opted for a proper electronics power supply as well 😁. And I see you're pushing 30V at 0.1A, so I definitely started with my battery in a different state, granted it's an automotive battery and not deep cycle which I assume yours are. Original: I guess my battery isn't following the profile. I left it for 2 years (negative was unhooked) and it was showing about 3V when I threw my lab PSU(Riden RD6012) on it. - Started in the morning - Set voltage limit to 14.5V, set current limit to 12A. -- Current starts out at 12A and once 14.5V is reached (pretty quickly built up a surface charge) it starts dropping - Current dropped to 1.25A - Current climbed to 4.8A max after 2 or 3 hours - Current slowly backed down to 1.9A by night time - Charging at 0.5A after 24H. I might get lucky. If not, I'm not doing a month. I'll just replace it. It would have been nice to see the voltage profile of the battery with your old charger to see what you're charging it with, for someone who has a more controllable device. (I apologize if I missed it, but didn't see an initial charging voltage). My question would be, is there a firm voltage threshold that needs to be crossed before the desulfation can begin?

[@knurlgnar24]

Wow, sounds like your battery somehow avoided significant sulfation damage. Congrats! The 'dumb charger' that I used outputs about 16V open circuit (difficult to exactly quantify due to rectified sine wave complications) but drops fairly quickly once a load is put on it.