How to charge a drained lipo - rescue a low voltage lipo w/ battery error

[@timjarman6027]

No problem with lipo cutoff here. You are supposed to remove the battery when its done

[@gregbakke8296]

Thank you for these informative videos. I've been considering changing to lipos but reluctant due to the dangers of them. Thanks to your videos, knowledge is power and you explain in a language even I can understand.

[@RCReviewChannel]

In lipos, knowledge is power and safety. They're completely manageable once understood. And their benefits are immense.

[@dandieleman2715]

Greg, my man, make the switch already! If your nervous, literally just pickup the spektrum smart bundle, whatever power stage you need and enjoy! I really am normally not a spektrum guy specifically but for folks who are still on the fence in 2022, it opens up so much more power, runtime, major decrease in recharge times, and pure excitement and enjoying whatever your hobby is. Hands down, you simply won't regret it. Now, cost is your enemy upfront which if that is the case, look into "non spektrum" versions of the same items and do the needed research. It's stuff you'll need to know regardless. 👍

[@purplelegorc2170]

I just threw one away 😞 didn’t know you could save em… poor battery 🔋 it buried alive somewhere. 😳😆. Thanks

[@DoRC]

This is a terrible idea. There's a reason a lipo charger won't charge your battery once it gets below a certain voltage. It is because once the cell drops below a certain voltage internal cell damage can occur. This internal cell damage can result in rapid catastrophic failure at any time in the future without additional warning whether you're using the battery or not. Doing things like this is how people end up burning their houses down and why lipos get a bad reputation. Please do your research before making recommendations like this.

[@RCReviewChannel]

Very good, sophisticated chargers will charge and balance batteries even if the cells are below 3v. Many budget chargers will refuse to charge when voltage is under 3v because they allow non-balance charging where the user specifies the number of cells of the battery. The only way the charger can validate that is by requiring a minimum of 3v per cell. Otherwise, a 2 cell battery may be charged by the user as a 3 cell and that will cause real trouble. The key is to do it carefully, understand what's happening and balance charge always and monitor the battery. We've done it dozens and dozens of times (and hundreds based on the comments) and it has worked flawlessly. News of 'rapid catastrophic failure' is fearmongering IMHO.

[@DoRC]

@@RCReviewChannel I have professional training with large scale lithium battery backup systems. I assure you it's not fear-mongering. Can you get away with it? Sure. Will someone remember that they revived a battery 6 months ago when that battery happens to burn down their house? I doubt it. Even if they did people are very hesitant to blame themselves when they do something stupid. It's much easier just to blame The failure on "dangerous lipos". When properly treated and cared for lipo batteries are extremely safe. Reviving a dead lipo is literally playing with fire. Information about this and why it is dangerous is readily available from a reputable sources. If you're going to show people how to do this at least describe in detail why and how it might be dangerous so that they can be fully informed when they make a decision on what to do.

[@roadrash76]

Good to know. But I've always remove the batteries from my rigs when this happens, so I've never had the issue of the other electronics draining my battery.

[@RCReviewChannel]

You sir are doing it right.

[@rkd350z]

Good habit

[@MichaelTaylor-5000]

I use Lipo bags religiously even to transport so I never have a battery in the car unless I'm running it.

[@roadrash76]

@@MichaelTaylor-5000 same.

[@roymeeks5664]

How do you fix broken balancing leads that break off close to the battery seems like some of the balancing wires are very weak they break after you bend them they should make them more pliable too afraid to solder too close to one another the One battery I've only used 5 times paid a lot of money for it,4s...broken wires......

[@RCReviewChannel]

It's very hard and dangerous. Get another balance pluga with wires already , solder, heat shrink tubing

[@tojikdominic]

This really helped. Mine is a 4sbattery. I chose .2A and 9.8v in limh mode and charged up to 12 v so that each cell gets 3v. It worked.! I continued with normal charging then. Thanks a ton.

[@davemcy]

Thank you so much for your excellent video. You totally saved my 11.1V 3S Lipo!

[@fransswwaa5337]

Thank you for being there for this community this helped me out big time today. Gave me the confidence to experiment with batteries that I thought were trash.

[@TuxStang]

complaining about ESC still draining the battery you forgot to remove after cut-off is like complaining gun does not protect you from shooting yourself in the foot

[@RCReviewChannel]

That may be a stretch. No other electronic device will cost you a $100 battery for leaving it on. Just an opportunity for improvement

[@TuxStang]

@@RCReviewChannel It's not a shutdown, it's a warning. A shutdown would be wrong 'cause once back home, you'll forgot about the empty battery. Take the habit to remove the battery once used (empty or not) and there'll be no issues ... RCs are not designed for batteries to stay inside, that's for the toys.

[@Kriswixx]

Hello sirs. I have a 48v20ah scooter battery, that I left on and drained all the way down to 28.2v and will not charge with my charger it came with. I do have my drone gear and my B6 charger, so I can do this, I just need to get the proper Xtc60 yellow connect soldered in between so I can use it from the proprietart 3 prong connector which i have isolated to where the + and + and unused area. Just need solder confidence. -- my question is, -- its a 28v, and what volt do I need to NICAD trick it to then use my regular 58.4v 2ah charger? --- I am thinking 33-38v? I don't want to over charge it with nicad just enough to get it to read out on the original charger-- what is the proper stop v? Thanks man.

[@simonjohnade]

Really great video and info. Very much agree that the cutoff should be system wide. Fix the problem at the source and it should prevent a fair percentage of folks from getting into dangerous lipo situations in the first place. Perhaps a possible fix could be that when the cut-off does happen, a beeper on the car starts indicating the state of the battery and only switches off when the battery is disconnected...?

[@RCReviewChannel]

Exactly. When a lipo is fully discharged for a long period and a cell dies, it creates a dangerous situation on the next charge cycle. More if they don't balance charge. A pack that's slightly out of balance by .1 or .2 volts is no big deal and does not cause much harm. But a dead cell means it's imbalanced by 4.2 volts. That means a charger will try to charge a 1 cell of (2-cell) all the way to 8.4v

[@SwampersRC]

I have used a separate battery to run a light bar with a remote controlled switch. At the time I didn't realize the switch itself continues to draw power after turning off the light. I still have some old-school chargers from the 80s and 90s. I used the trickle charge mode ( which is @ 1amp or less) for an hour or two. This brought the voltage up enough for the lipo charger to recognize the lipo. Balance charge and it's all good again. I should also point out that if your truck has a separate bec installed turning off the esc will NOT turn off the receiver or lights!

[@Aries29ah]

IT WORKED! I rescued my brand new Drone by Venom 4s 1300maAh on HiTEC Pro Charger using this trick! Battery did not get hot at all, felt really safe. IM SO HAPPY!!! Thank you!!

[@MarioIArguello]

Older made RC Models use to have not only a Power Kill ON-OFF switch but also a fuse in line with the system in case of over drawing current, protection. Today you simply connect the Li-Pol that is your kill switch but clearly if you forget to disconnect the battery your battery is going to drain, unless you have a low battery warning device on board like a loud beeper. Just put a single pole single throw switch in line with your battery receptacle, on the rc model side and you are good to go if you like keeping the battery on board the model all the time. I prefer to simple disconnect the battery since after use they still need to be disconnected and placed on their proper charger.

[@Schallgetriebe]

Thank you so much! With your advice I could rescue my 0V LiPo... forgot it for weeks in my good old CC-01. I gave it 2A for about 2 minutes in NiMH. After that I got about 3.2V for each cell and my LiPo charger didn't refuse to charge the thing. Won't happen to me twice...?

[@claytonha7898]

What has worked for me in the pass is using a same voltage battery that is charged and using a parallel adapter to charge the drained battery monitoring the cell voltage through the balancing port until the voltage is sufficient enough for it to be properly charged with the lipo charger. If you don’t have a parallel adapter you can use jumper wires negative to negative and positive to positive if you don’t understand what parallel connections are look it up.

[@MrDonkybonk]

Great info thank you. I didn’t know why my battery wouldn’t do anything Before seeing this,I got it to read 3.2 but I put the balance line back and changed to lipo but it didn’t start charging but it did light up the start line, it wasn’t before so I put it back onto NiMH @ 2.0A and watched it until it got to 96%@ 665 20min. mAh it is a 6000mAh battery 11.1v Spektrum s155 smart G2 charger new battery only used once but left plugged in the truck. Checked the cells @3.69 I Was able to get it charging normally again. Saved a 35.00 battery TY

[@ragsixracing]

always unplug your battery and remove it from the vehicle for safety reasons put it in a lipo bag or fireproof box. I remove the switches from ESCs if possible. I just never leave them plugged in 👍

[@RCReviewChannel]

Good tip! Thank you.

[@nigelhopson2584]

This video just saved not one but 2 of my lipo batteries!!!! At $55.00 each this is much appreciated. This hobby is already expensive enough. Thank you Sir!!

[@gregorystephens4294]

I have a 4S lipo 5200 mAh. While charging two of the cells will reach 4.20v and one of the cells is stuck on 3.84v can I use the NIMH method to correct this problem and if so what do I set it on. I have The Prodigy 610 quad AC / DC battery recharger

[@Sw1shersplitter]

Connector question: 1/24 FMS Land Cruiser, I want to buy a balance charger for the 7.4 380mah 2s lipo but I don’t know where to find the proper connector adaptor for the charging end. The balance cable I know, but the charging connector is weird and I can’t find it on Amazon. (Afraid to use the USB charger they supply so I’m looking for decent charger so I don’t burn my house down 😅)

[@ChasingplasticCars]

Great video (as always) Never even thought about power still draining after cut off 👍

[@RCReviewChannel]

Right? It's not logical so it will bite many rc'ers in the wallet before it becomes second nature to unplug. And sure, one deserves a discharged battery if they forget to turn off. But a ruined, precious lipo is a high price to pay.

[@the_car_guy5915]

I found my battery in my Wraith 1.9 that I haven't ran in the better part of a year 🤦 Recovering it as I'm typing this. Put it on NiMH for ~2 minutes (until it showed 5.75V) and now I'm charging it on LiPo mode and it's at 7.4v. Seems to be working fine and the battery isn't even warm.

[@monkeytrident]

@RC Review I have a problem I have a 3s 5500 mah lipo which I may have forgot to storage charge, but I am sure I did, now when I went to charge it, I see sell 1 is 0.931v and cell 2 is 4.175v and cell 3 is 4.210v, how can I get cell 1 volts up, I have tried the Nimh recovery but no luck.

[@HappyHermitt]

I stored 2 Spektrum "smart" 3S Lipos too long. They're above 3v but my charger won't let me. Frikkun garbage batteries Edit: I ordered s150 charger. Will attempt to charge as nimh

[@jonjacob1962]

GOD your videos are SO annoying... Every time I watch one I figure out why I STOP watching them... I'm trying to figure out what's wrong with my less than a month old TRX4 and here I am trying to get through your tangents and pauses and shit...

[@nobody617]

It worked for me! I bought a xo-1 last year and ran it only once and its sat for a year. They wouldn't charge. Alarm. I did this and it worked. They are now working perfectly, like new runtime. I can't believe it Its like the new car battery chargers. They wont charge a completely dead battery. You have to jump it, get some voltage stored and then the charger will work. I didn't know tjis and returned my car charger to harbour freight for a new one. And then i figured it out. Hey, they shoulda told me, well i guess they didnt know. They probably need to know this.

[@nobody617]

I think they need to make miniature nuclear reactors for our trucks. Nuclear powered rc might just be the future or should be anyways, But it probably wont happen do to politics mostly, Like everything else.

[@GAMMA_AF]

I left my 3s a little under half charge and didn't touch my truck for a couple of months. Came back and it was dead. I had no idea that it wouldn't charge if it was completely dead. The fact that a $120 battery can be ruined just by sitting at the recommended charge level is ridiculous.

[@ajsmooth2012]

What if I have a 3S lipo and your charger saying it's a 2S lipo? Can you do this to bring that cell back to life doing this method?

[@Tookie-2014]

So I accidentally charged my 4300 3s at 8.6 amps now it will give power to the drive but not the direct power servo. Is my battery toast or is there a way to salvage it? It has no puffing and the battery is only 5months old

[@blindmenace69]

New to this hobby , brought a $180 lipo and after the 1st use , drained it to much , got the low voltage and nearly cried , thanks for the help . 👍 😆

[@lukabalta2398]

i just accidentaly took 3.5v discharged battery to test if everything works after settings adjustment and drained it to 2.7c per cell its 6s tatto r-line battery it is alreadi around 3.1v per cell is it still safe to balance and use normaly ?

[@josephwilliamson1287]

The safety is for aircraft So you can bring a dead stik Plane in without crashing A 40$ batt compared to a 400$plane

[@huntermann6084]

The traxxas ex peak will restore batteries if you use the "store" charging mode and then the "fast" changing mode then the "balanced" charge mode

[@victornaja7927]

hey what brand lipo battery do you recomend. say for the traxxas 1/10 chevy k10 truck

[@kevingalea92]

Tell you the truth i dont have that problem at all i never leave the battery in my cars or trucks and when the cut off starts i know time is up and change up the battery kinda simple if you ask me lol 😆

[@antmansrt]

If you cant turn your car off and unplug it you should not be around hobby grade rc's. Companies cant if stupidity.

[@martinjohnson4124]

This method didn't work for me but what did was putting it in storage mode brought it up a level were I could use reg charge again 🤷🏾

[@matadd5803]

My battery I have not charged it for a long time when I plug it it it’s says connection brake

[@gamercat7004]

I have a 3s lipo battery that became a 2s battery and can't discharge it and charge it. And what can I do to it? Even if I try spinning my rc in the air to drain it won't work no more.

[@mike_hawk_eshuge]

Worked on the first try! Thank you sir liked/ subscribed as well great help!

[@Evergreen085]

I tried NIMH and it puffed one battery and the other is still flat! Sucks its worked for me before but not this time.

[@smOOdiebOOdie]

Who doesn’t turn of their car after it’s been driven??? 😅 it doesn’t turn of itself just because the cut off. Always unplug the battery from the esc if you store your car with lipo in it. With time it will drain the lipos and then you have to charge it a bit as nicd like shown in video.

[@RCReviewChannel]

It's that forgetfulness thing that bites folks eventually. A transmitter left on, you just charge it back up. But an rc lipo dead, and money lost. :)

[@GHOSTsq]

I let others use my 100$ battery and it don't work anymore 😒 figures

[@Akdave2020]

Easiest way is to use a lot optima battery charger put the Allen wrenches in the Traxxas battery then select motorcycle

[@PixelPainta]

Bms the battery with a high amp output. The Bms will definitely cut off with voltage is low .

[@DeRock401]

The most important protection is knowledge. Thank you for this video.

[@RCReviewChannel]

Exactly. Knowledge and procedures

[@charlesb7831]

I've had all my Lipo's for years now. Only my wife's Lipo's were destroyed, one caught fire. All the Lipo's are immediately removed from the vehicle's or my airsoft stuff and kept in Lipo bags and those are placed in metal ammo boxes. These are fantastic videos, been subscribed for along time now, Cheers!

[@Dantohr]

The cut off work perfect. It say to you, hey Turn the Power off and load your lipo. If you dont hear war it say, then it's your fault

[@jdsrcs8061]

Time to get the box of dead lipos out and see how many I can save.

[@RCReviewChannel]

Oh heck yeah!!!!!!!! Keep us posted

[@jdsrcs8061]

@@RCReviewChannel I will Fran!!!👍👍👍

[@928_tyler]

@@jdsrcs8061 been a Year

[@jdsrcs8061]

@@928_tyler Awe man you are correct!!! Here is the update. I had 10 batteries in total. 2 5000 3s, 2 3500 3s, 2 1500 2s, and 4 350 2s. I was able to recover, 1 5000, both 3500s, 1 1500, and 3 350s. Since then 1 3500 puffed about 4 months after the recovery, and 2 more 350s puffed about 6 months after the recovery. All the other batteries have been fine. No puffiness, and all cells have balanced perfectly. Thanks for reminding me about this. I had forgotten!!!🤘🤘🤘🤘

[@Truthstillmatters2]

Would it be wise to use a recovered battery in a EDF jet?

[@monacocross4241]

but battery work ok after this method ? i thing after can very fast lost voltage , and if toy drone cant to fall

[@peterbrady2165]

Even if the esc is turned off but still connected to the battery the capacitors are still draining the battery till there is nothing left.

[@MannyGunzz]

What happens if one of my cells is a little lower than the other two cells, can i still recover the correct battery voltage on all three cells??

[@pabichpawel]

Nice vid. What is the cheapest smart charger that can charge LIPO batteries that are at less than 3Volts?

[@nicerc8599]

Storage also works i rrcommend lipo alarm for this situation

[@jamesn6048]

I literally just drained a 6s lipo to 9.5 volts 👍👍

[@austinb1824]

This guy real asf. Subscribed!

[@THEMASKEDMASTER]

✌🏻😎🏴󠁧󠁢󠁷󠁬󠁳󠁿Nice👍🏻 Any ideas on how to save a spektrum smart battery?

[@RCReviewChannel]

You'd have use a normal charger (not smart) and just use the negative and positive leads of the battery with alligator clips or an EC5 connecter going in to the Spectrum IC5 connector.

[@khatzine7244]

once in a looonnnggg time ago, my lipo burned down my xmax ...

[@syndicate9974]

thank you man it

[@HappyHermitt]

Charge as nimh but monitor cell voltages

[@tamertamertamer4874]

Sadly my battery is 0 everywhere and NiMH charging doesn’t do anything. I’ll have to find a way to dispose of it :/. Thanks for the video tough. It’s a battery that has been left empty for multiple years so it makes sense

[@RCReviewChannel]

Yup. Dead. Gotta know when to give up on it

[@mgoo1713]

That why I take the drained battery out right away...

[@tymiller6321]

Thank you so much saved me $70!!!

[@BeBetterPeople2449]

Another issue with LiPo battery cutoff is that it operates on the full battery voltage without regard for individual cells. If a (cell or cells) is out of balance, the ESC may happily discharge it way below its cutoff because the other cells are propping up the voltage reading.

[@RCReviewChannel]

Oh for sure. Lipos in RCs are used as a unit, not individual cell monitored unfortunately.

[@himinplazy2491]

is it ok if i store my rc car's lipo plugged in but esc off

[@phillipebaccam142]

Yo. Uncle. I have so many lipos, new that i learned the hard way many times. I've tried all this but won't work. Think a dif charger will help?

[@RCReviewChannel]

I don't think a different charger will help. Make sure you have a balance charger where you can check the voltage of each cell before and after the process. If one cell is dead, no go.

[@Ittybittythetwofacedkitty]

Is it ok (normal) for a LiPo to get pretty warm after use. I have a boat that that uses 4s and the battery gets decently warm after use. It is 2200mah, and 50c. Can’t find a battery that will fit in the battery compartment that is more than 50c

[@RCReviewChannel]

Yes, warm is very normal. Hot and puffy batteries though is not good and means it doesn't have enough C rating for the job.

[@adventures3699]

Can you revive a life battery as well?? I have a spektrum 2S 6.6V 900 mah life receiver battery and it wont charge!

[@RCReviewChannel]

Hard to say, specially with Spektrum which are semi-smart battery.

[@EJ-74]

I got my plane stuck in a tree 60 - 70ft up. I just put a brand new 3S 500mah 30c in it and it took me 3- 4 days to get it down I also had the battery connected to a voltage alarm so it drained my battery completely dead. My charger want even recognize it's plugged in lol Going to try to bring it back from the dead right now!!! 😁 Thanks for the tips!!!! 👍🏻✌🏻

[@Shane-hc6fs]

Thank you. You just saved my brand new battery!

[@RCReviewChannel]

Glad I could help! We're saving the earth too.

[@oddeman3489]

Never do this, the risk for an unwanted fire is to high, if a lipo is dead broken or damage trow it away and get it out of your house. Lipo's is not a toy or anything worth messing with, discharged or dead = garbage, get it out before any accident will happen.

[@RCReviewChannel]

There's degrees of discharge and it is worthwhile understanding why, especially if it's a very expensive lipo. If the cells are at 2.9 volts, they will not charge with low cost chargers even though they are perfectly fine. A much higher quality charger will charge them right up. But if a lipo is indeed dead and erratic, get rid of it.

[@timjohnson9406]

No actually I have never forgot tho shut it off. And you should automatically just be unplugging them when your done anyway.

[@RCReviewChannel]

Good, good. Many have as evidenced by the comments here and it's a reminder for all to do as you do.... unplug.

[@artesanrc]

If your 4 problems with low voltage cut off were applied to RC planes/helicopters the models would fall from the sky and crash, potentially causing harm to property or people! However, if talking solely about ESC's for RC cars I can see your point. But, it's not difficult to simply switch off the power to the car and remove the battery, as you mentioned later. Also best to avoid getting to LV cut off in the first place by using a cheap audible alarm set to a level above the ESC cut off voltage - 3.75v is a good level to keep the lipo healthy. And, best to always balance charge lipos with a good quality charger. Your lipo recovery methods do work and I have also used a lead with just two pins which are plugged into the balance connector to charge each cell individually followed by a proper balance charge. Of course, the battery is closely watched and monitored throughout the process.

[@SteadfastRC]

Just get some cheap lipo alarms and plug them into the balance lead homies. They are super loud they wont let you forget your battery for long.

[@RCReviewChannel]

That’s a very good idea. I’ll look into it. Problem is some batteries are super tiny and some are monster and I’m not sure the same lipo alarm will work for all.

[@Nordlicht05]

@@RCReviewChannel normally they plug into the balancer port. They only dumb wantch voltage but for each cell separate.

[@boogermonster100]

Word to the wise, be careful with tricking the charger. I've done it for years and worked great. However, once you get the battery to voltage and change back to charging correctly. You can risk failure. Sadly this happened to me and the battery failed. With a 6s fire was to quick and fast to put out once the unstable cell lost it. Even the Lipo bag failed.

[@RCReviewChannel]

Thanks for the info. It's a good tip and one has to be wary of tricking a charger even for just a minute. But using a small balance charger or a very good lipo charger is an alternative and safer.

[@boogermonster100]

@@RCReviewChannel Most definitely. My problem came after the voltage was above 3v. Placed it back to balance charging and the battery had heated up and burst. 3 fire districts, 10 men and women. Definitely recommend when doing so to keep an close eye on it at all times.

[@theirishaxe9405]

Just gotta be smart enough turn off the esc and unplug the battery i don't think it's the industries problem it's the people who don't get it after the first couple times. Get a low voltage alarm then you won't have a choice but to pay attention to it.

[@RCReviewChannel]

It’s not necessarily a problem but a great opportunity to improve the hobby for all users.

[@bryanwhat2268]

yeah that the way i charge a low battery i just trick with the nicad charge then go back to regular caging

[@RCReviewChannel]

That’s the way my friend.

[@danielkonrad1444]

Nobody should leave a battery connected when not in use. Simply unplug and storage charge.

[@RCReviewChannel]

That's good advice for sure. Proper setup and cleanup procedures should involve this after every day at play.

[@bcochener]

I’ve had to use that trick a couple of times. I read to trickle charge it at a low amp though to bring it up to a salvageable level.

[@mikeb5556]

Worked for me, thanks.

[@nicksantitoro]

I would recommend putting your battery and charger outside, especially during the nimh stage. I have heard that the Lipo could swell while charging if it is under 3 volts.

[@RCReviewChannel]

In my experience it only swells if you get it well over 4.2 V and I’ve tried it a couple times already.

[@DoRC]

It's not just in the beginning. Once a cell gets below a certain voltage internal cell damage can occur. This can result in the battery failing catastrophically at any time in the future. This is exactly why the lipo charger refuses to charge the battery when it's below a certain voltage. This video is both uninformed and dangerous.

[@rkd350z]

Always disconnect battery if the rig is not in use Always store it on storage volt which is around 3.80v/cell which is around 30%charged level. If charged battery don’t get use, discharge it and put it in storage charge before letting charged battery sit for over 24hrs Charge battery at lower Amp, unless you are in super rush. I set these rules for myself for safety concerns but also helps battery maintenance. These rules work well for me.

[@RCReviewChannel]

Storage charge is very smart. It keeps the battery at its safest state and it doesn’t take too long to fully charge it.

[@scottyh72]

If you discharge a Lipo until a lipo charger won't charge it, it has been damaged. Bringing it back may work, but the chances of it failing go way up. Packs are cheap. If you over discharge, dispose of it properly and get a new one. A fire is not worth a

[@RCReviewChannel]

We’ve been using some recovered Lipo’s for well over a year with no problems at all. The issue is most chargers are just not smart enough to know that I Lipo is just a hair short on voltage and it’s perfectly fine. Another issue is some of our Lipo batteries cost over $200.

[@davidwolf9080]

@@RCReviewChannel First, I love your normally extremely informative channel and might try this method under safer conditions (double LiPo bag and probably outdoors). I currently have my questionable LiPo’s double bagged AND in an ammunition box. I’m just surprised by your lack of cautionary words and not showing a charging bag for a potentially compromised battery. I watched this a couple times and I think anyone (especially those new to LiPo) would interpret that anything over zero volts is worth a try. You showed around 2 volts. Have you been successful with a battery near zero volts? I know some experienced guys running batteries with a significant amount of puffing who don’t believe it’s a concern. The problem is I don’t think anyone can clearly define how much damage is too much or even know what internal damage is actually present. Maybe a basher has more risk than a crawler. It’s only my basher batteries I’ve killed due to impacts I believe. I think I watched a LiPo fire video you did way back. I thought you might reference that here and again urge some caution when doing something not recommended by manufacturers when it could involve fire safety. You’re clearly one of the more intelligent guys in RC but this is the first time I’ve been disappointed in your message wisdom.

[@davidwolf9080]

I now see that you’ve done more LiPo safety videos than the one I watched a few years ago. Please don’t assume people have watched your newer safety videos in one like this one in which people may try to charge a significantly damaged battery.

[@khanabid7864]

thank you my friend 👍

[@TheYoungerSemiOldMan]

WOW!!!! I had another battery die. This time its mine, last my sons. These battery's cost over $100 and expensive. Well, I followed yiur trick, read a few more pages, and bam, theyre both charging as of right now this very second. Thanks so much man!!! I think the one 4S is too low. The shop did something a while back and they said it dropped too far and not worth it. I'm trying to get it going now on NiMH and see if itll start charging again. My 3S had to be charged for 15min to get it to finally have enough juice to charge.

[@atthecontractor]

Hey thanks for the video, just want to make sure, my 3200 Lopi 7.2V 2C i think is dead, below 1v. i got it charging on NiCd, it's been charging for about 20mins at 0.1A and it keeps going up and down from 0.49V-0.51V. should i keep trying or too far gone? Thanks in advance.

[@JPM788212]

Just get a Revolectrix Cellpro PowerLab 6 6S/40A/1000W Battery Charger PL6 and you don't have to worry about it. It will safely bring up the voltage per cell on LiPo setting without worrying. I've brought back batteries with it that were close to 0v. It can't revive a battery that needs to be retired, but it will bring back an under volted LiPo battery. Great video and recommendations for those who need to bring back a battery with a picky charger.

[@poorlifedecisions5357]

I hooked up wires from a good lipo to my dead lipo for 10 seconds and then my charger started to charge it

[@Slotmachineking567]

😂😂😂😂

[@scottcardinal6147]

My spektrum 1100 charger cannot be tricked into this

[@RCReviewChannel]

For sure Spektrum, Traxxas and other automatic chargers cannot perform this save operation!

[@chrislilly8657]

So I destroyed my vehicle that took my 6s battery and tried maintaining it for the last year but forgot about it. I picked it up today to charge it and it was giving me the low warning and wouldn't charge. I took your advice with the nickel metal hydride and charged it for 10 minutes to bring it up to almost 22 volts, now it's balance charging fine! Thank you so much because these damn things aren't cheap,,, now I just got to find something to put it in

[@lectro88]

I LOVE your honesty. Now I wish ESC's cut off "BEFORE" 3.0 I find it's a hassle to charge after a cut off, would rather it cut off sooner and not give me trouble come charge time. But this is my 1st. Lipo and first couple test runs, So I'm still learning. Thanks.

[@gamerlive3598]

Lipo cut off i think this is give to you notice that you batterry needs to be charged! Still cool

[@RCReviewChannel]

Lipo cut off exist so you don’t run the car until each cell is below 3 V.

[@TKO593]

Just saved a 2s lipo for my drag car. Had only a few runs on it and was down to 1.3v per cell. I almost exclusively switched to Spektrum smart batteries that auto discharge to storage voltage, but my drag car has a CHNL 120c battery that doesn’t get used as much.

[@ezrabegin8234]

Me with a traxxas charger 😭

[@triptechb]

My ESC has an electronic on/off button, forgot to unplug the battery for a few weeks, and got the dreaded “can’t charge…” message. This saved it!!

[@josecastromora2968]

I try this and a almost burn my house but that's because i did it so many times that i though it should get more voltage

[@RCReviewChannel]

Yeah, try this only one time. It'll either succeed in 30 seconds or the battery won't recover and is a loss. Doing this repeatedly or for a long time is risky.

[@AllConsumingJAWS]

Thank you, my friend. You helped save my battery. Keep up the great work. Thank you again. 👍👏✌️