NiMH nickel metal hydride battery recover rejuvenate renew repair Like New

I got a box is RC stuff with a bunch of NiMH batteries. These had probably been sitting for 15 years. Each of these packs would probably be around $30 each to replace. Recovery is easy using the zap method an cycling. The zap method is quickly over charging the battery with either a higher voltage or changing amperage. The purpose is the shock the cells and break up the dendrite crystals that are killing batteries capacity. I recovered 8 battery packs to near new capacity and one (black battery) has about half capacity.
Hitech battery charger
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[@lexicase8805]

Wow ive never seen an informative video like this get so much hate! I think you did well and confirmed that what ive been trying myself might actually work, so thankyou for this, you've explained it well and proven your method works at least 3/4 times. Thumbs up 👍

[@kevinm3751]

Awesome, now I know why I have been hanging on to all my old batteries. Thanks for the tips!

[@alexandres8846]

To balance nimh battery packs, a circuit with two 1n4007 diodes in series plus a resistance of 1 to 10 ohms is used.The voltage drop in each diode is 0.7 volt x 2 is 1.4 volts.The resistance limits the intensity of the balancing current. Being soldered to all Ni cells this increases the life and performance of the battery pack.

[@michaelb.8497]

This requires too much prior knowledge to have any value to me.

[@alexandres8846]

@@michaelb.8497 thanks and simply versión. balancing the cells with resistors in each of a value between 430 ohm to 1k ohm. this applied to battery packs on old satellites google patent information.

[@johnle231]

@@alexandres8846 any idea if Nimh batteries can be used for power wall and charge fine by solar system

[@justmeigor1852]

@@johnle231 I am busy atm with it. connected 3 in series to get minimum of 3v an a max of 4.2v. a daly li ion bms ans a hencon balancer shoud do the trick. They will balance inbetween themselfs. some bicycle packs with nimh dont even have a bms. for savety i keep the powerwall at 24v dc with a dc dc converter to my other lifepo4 cells at 48v nom.

[@johnle231]

@@justmeigor1852 Hmm. My understanding is that a Nimh cell nom v. Is 1.2 So 3 cells should make 3.6

[@michael47lamb]

Using a fully charged 12v battery as the jumper supply works great too. Just work fast because the cables you are using WILL heat up really fast when you connect to the dead nicad cell.

[@brayden12]

Thanks! I did this and it worked great, saved 80 bucks for a new battery pack

[@michael47lamb]

@@brayden12 I also found the hard way the this fix may not really fix much. A few of the cells I flashed like this only worked for very light loads. Putting real stress on them weakens them further and they wont hold a charge very long and will fail again later. Highly variable results to say the least. LoL

[@no-damn-alias]

What I did to jump start them is use then times the rated voltage. So first I charged them and discharge them with high current to zero and back up charging. Then one cycle of very high current discharge so it gets hot until the battery dies completely. Cool it for a few hours in the freezer and then jump start them with ten times the rates voltage for 3-4 seconds. Work rather nice afterwards at least the capacity is fine

[@Bulten1973]

thanks for sharing! I got to try a few cycles on some old nimh.

[@jasonmedeiros9492]

Who makes a better charger for NiMh Batteries for refurbishing? SkyRC or Hitech??

[@angeldoom4207]

Thank you so much i normally run lipo battery’s but I have a 4 y/o nimh that hasn’t been charged in 3 years and I didn’t know about cycle charging I have a simpler charger that uses the same charge master software so as I speak I am hoping to rejuvenate my performance nimh

[@anong345]

Can I do this to improve performance of 2-3 yrs old batteries that still works?

[@keithcitizen4855]

I have been enjoying getting 3 × 1.2volt cells working again , 2 fixed ok quick with a zap the third cell stubborn it charges but dis charges too fast on drain 20 milliamps about 2 hours , strange how it returns to 1.1 volts by itself out of circuit - am hoping a continual repetition trickle charge with a solar panel will make a difference over a week or so

[@ticktock858]

How do you revive a Ni-MH battery pack that's in a flat box like the tyco batteries?

[@БогданМура]

Nimh not need recycling, there is one contac that may have memory effect, we need use cc/cv metod to return it's capacitance

[@cekpi7]

I recovered few of them but in my experience they don't work as good as they used to. Internal resistance is a lot higher than new pack. They still work fine in low current stuff. I'm not sure if i skipped it or u didn't measure it, but internal resistance is a big factor on older batteries, not just capacity.

[@skylimits691]

Hello I bought new batteries for the wireless phone, of the type NiMH AAA 1.2v 850mAb, and I found one of them dead and does not accept charging. What should I do, may God reward you

[@mjsrcs3725]

Thanks man I have not yous my tamiya batterys for some time I can only do 5amps would that still be enough two sock them and would you say two put it on a cycle charge for 4 Cycles👍👍👍

[@theaussienurseflipper.8113]

Gr8 video, when U discharge with bulb, do go untill light goes out, cheers

[@nfsse32]

How much would you charge to try and see if you could recover some battery's for me

[@fintechrepairshop]

What kind batteries?

[@nfsse32]

@@fintechrepairshop nimh batteries

[@nfsse32]

7 cell stick pack

[@Court_Reformer]

What's the black box with motor and blue battery? Link please

[@grindfreakmike5754]

you show fixing the reciever packs but not the actual battery used to power the car.

[@iulianiulian2647]

This work on NiCd? Thx...

[@chrismorgan1366]

Does your bench charger always load up with 666 on the screen ?😂

[@a4e69636b]

So glad I'm not the only one who noticed that.

[@hubzcaps]

Little buble hisses from my pack. Outgassing is normal after long storage or is it pooped

[@redditreads1878]

It's normal but just keep an eye on it tho

[@supercommando440]

How do you check WHICH cell in pack has no voltage? Or is the strategy to "jump start" an entire pack to hopefully get some juice into each cell, so a smart charger can detect it and properly charge the pack? I don't understand why they can't make these smart chargers SMARTER, and provide a little voltage to the cell(s) it detects are not charged enough, so the charger can then properly charge the pack! I'm sure they would say it's a "safety" thing but I call it a scam. These smart chargers should be able to bring these deads back to life.

[@lexicase8805]

Cut the shrink wrap off and use a multimeter to test your cells individually, and if need be like in my own case, put a charger on each cell one at a time directly to revive them but also balance the pack. Unless you wire up a balance lead like on lipo packs, the charger cant be "smarter" because its only got two wires to work with and treats the pack as one higher voltage cell, it cant see the individual cells

[@zbbo1676]

try couple of batteries with this way , but none of them works.

[@rexgeorg7324]

try on the laptop battery pack

[@michaelb.8497]

Nice try, but this video is practically useless unless the viewer has some electrical knowledge, The presenter makes too many assumptions, talks too fast and should plan his presentation better enabling the viewer to follow it easier.

[@fintechrepairshop]

Hilarious

[@haltomme]

Any regular person does not have all that shit. Make a video that regular people can use.

[@angeldoom4207]

Is your nimh pack completely dead like 0 volts or is it holding some sort of charge and barley putting out any power and for a short time

[@gregorymalchuk272]

@@angeldoom4207 What would each option mean for the prospects of recovering the battery?

[@stegususcley2655]

So how many people do you think has all that gear. And bud,you talk too quickly,and you speak to yourself,which is confusing,along with bouncing around in the subject. All in all,there are several vids out here that are much clearer and dont require all the gear. Rate 1 to 5,...a 3 Sorry.

[@fintechrepairshop]

Cool

[@xConundrumx]

I found it to be quite illuminating. As for the gear, well chucks... I guess if you deal with such batteries even a little bit it will pay for itself in no time. For me for instance the cost of that red charger right now is 67 euros. I am looking to revive 2 battery packs. I just looked up the price for a replacement battery pack and it is 92 euros for 1 (I need 2). You do the math. I also want to point out that just like about everyone here (you got to this video for a reason I suspect) aside from my immediate need (those 2 packs) I probably have (of the top of my head) a couple dozen other packs I could try this on, instead of chucking them away (and the environmental impact that comes with it). Hell even the bench powersupply is dirt cheap, you can get them for a 100 euros (probably even far less if you look), when you think about what it would cost to replace those packs.

[@stegususcley2655]

@@xConundrumx Well,Im just too happy for you.I dont recall addressing you in my comment to him about his video.soooo. I run 3 high end cameras in my photography work.I carry a couple voice recorders with me as note keepers while Im working.I have 4 battery operated lights that I use in the van in evening jobs rather than use my vehicle battery for lights.And each light uses 4 batteries. And my list goes on.Yes,I use a lot of batteries.That is why I viewed the video.My point never said his system didnt work.I said he is confusing jabbering away,rambling around rather than instructing. As for all the gear .. he has turned this effort into a hobby.All the other instructions on KZbin doesnt require all that gear.Just a common charger and a volt meter. And,for the cost of the items you mentioned...theres an old saying that rings true 90%of the time... you get what you pay for. You buy at a cheap price...you get cheap products. So... you go and spend your money on your fancy doo dads. Ive found an instruction video on youtube that has worked for me since I first commented here,and theres no reason for all those fancy "toys" .AND,Im saving my money,not buying unnecessary gadgets.

[@xConundrumx]

@@stegususcley2655 It seems the concept of an open ended comment section eludes you. You should expect others to reply to your statements too. At any rate good you found a system that works. With what was shown here so did I. Everybody happy.

[@stegususcley2655]

@@xConundrumx Nothing eluded me.What we have here is when someone posts,and I comment to its creator,people take it upon them selves to tell me why Im "wrong" because I dont see it their way. My statement to the creator wasnt any of your business.And I didnt tell him his method was fake or wouldnt work.But in the end..I didnt include you in the comment.Had I been talking to someone on the street about his method of teaching,and someone stepped up on me running their mouth when they werent invited,theyd be picking their ass up off the street.