How to rescue a dead lipo battery that won't charge - voltage too low, drained, discharged error
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- Опубликовано: 1 окт 2024
- Rescue drained lipo safely - charge dead lipo cell with lipo too low error and lipo charging error for dead battery
Gens Ace Imars charger - alnk.to/esTlCSC
Chargers at Amain - alnk.to/4BCUHcG
Batteries at Amain -alnk.to/cHJLOKG
Gens Ace Imars charger - alnk.to/esTlCSC
Chargers at Amain - alnk.to/4BCUHcG
Batteries at Amain -alnk.to/cHJLOKG
Video got cut off. Here's the info: Proceed at your own risk and be very careful if a cell has died or is defective. Reasons why battery won't charge:
1) no lipo cut-off on esc
2) ESC was left on. Or ESC switch is electronic and slowly leaks energy from battery. Must unplug the battery always
3) One cell in the pack has died. If this is the case, DISPOSE OF THE BATTERY. Check each cell with a balancer and monitor that it stays balanced after recovery.
Can use a balance checker or a 2nd charger to monitor cell voltage while doing this NIMH method. Be very careful, monitor the battery closely after recovery and proceed at your own risk.
So... let me say this:
I ran a hobby shop, and been doing rc shenanigans for 30+ years. I've saved countless batteries for customers this way, but didn't tell them how (for safety reasons). Most ran their cars until they wouldn't move, which once explained, they didn't have any more issues. Some did leave them on, but again, explaining to them proper care it's critical. I have saved many with a good ole lectron pro.
Excellent job on explaining!
Thank you , thank you for real-world industry experience. Yes, there are so many new hobbyists that I felt it important to repeat this message and rescue clearly. I gae mini rc cars to a couple family friends and they both killed their lipos. Never ran them again I visited and fixed. This is a key problem of the hobby since it's all too easy to do.
In the future, all rc vehicles will have an onboard battery management system that will prevent this. Looks like most drones already ahve it.
@@RCReviewChannel
Absolutely! Going back to when nicad was the only choice, you monitored those constantly, and before digital metering, you gauged how charged they were by cell temps. (Good warm battery was charged). I'd you unplugged it early, or only ran it half, the cells would develop a false charge memory. With 6-10 minutes being the max, you couldn't afford to do that. When I raced in the 90s, sanyo released their 1700mah scrc cells, which were the best! Then they bumped to 2000mah, which was "unheard of! ". Ohhhhh how times have changed, and for the better. We need the drone battery tech for our new enthusiasts tho, couldn't agree more
I have a cnhl black 6s lipo battery. 1500mah (I think 100c).
I've owned it for like 2 weeks or a month.
I flew it/charged it about 10 times. I've never wrecked it.
I balance charged it to storage last time I flew(3.8v). Then I set it on my kitchen table for 2 days since we have had bad weather I couldn't use my drone.
Today when I plugged it in to charge I see one cell is at 1.1v! All the other 5 cells are still at 3.8v
What the heck happened? This was a 30$+ battery I can't afford to keep making mistakes for this cost.
Can I possibly save my battery? Should I jus follow this video instructions?
@@RandoManFPV.... yes. Try it
@@twisterzman is there any risk of the battery catching fire while on my drone?
I don't mind risk while charging, I'll keep an eye on it and throw it out the window if it gets sketchy lol.
If it fires off mid-flight tho I can't afford to fix the drone it'll ruin 😅😬
Great info! My only recommendation is putting a lipo checker on the balance plug before charging on nimh settings. I work for a LHS and we do that so we can monitor the cells coming back. It helps eliminate some of the guess work of wondering if you have a bad cell.
Great suggestion!!!! My other technique for safety is to connect the balance port to a second charger to view the voltage of each cell while it's charging with the first one.
Would this work if one of the cells are dead ?
Can’t do any of that with a traxxas battery :(
This only works when all cells are at the same level. If one or more cells are dead while one or more cells are charged this could be very dangerous.
Great tip!@@RCReviewChannel
OMG!! Thanks buddy,you saved my 2s batteries. Cheers from Arizona 🍻
Glad I could help
Thanks bro.. I just revived a battery that I thought was completely dead and wouldn’t charge for months! The error I was getting was “no balance lead detected” so I wasn’t sure if this would work. Did it at 2 amps for about 2min and boom. Back to Lipo and it’s now charging!
Whats your recommendation for a 6s battery that's 22.2v
Thank you so much! Saved 3 of my lipos. Took a break from the hobby for a year and this revived them thank you
Yet another good information video for me being a newbie to lipo the most important information being possible preventing it happening in the first place was at the end of the video which unfortunately cuts off before you finished your sentence. So now I'm really curious what was the 2nd reason?
uggh, cut off again. #2 reason - forget to turn off ESC. Or ESC switch is electronic and always draws power. Solution is to unplug the battery, always.
Thanks to both of you, that cut off sentence just triggered the hell out of my OCD..😅
LIPO safety ain't no joke. Great content! 🙏🏻
Nice job! Nice video! To prevent this, I like to use a buzzer, esc cutoff may fail. Thank You!
Thanks a lot, just saved my Spektrum 7.4v 4000mah 2s. Cost 50-60£. Good content and thank you for helping us out here.
Is this really safe im really scared to do this
Thanks for the advice.
I left my lipo plugged into my crawler for a few days. This vid helped recover my Lipo!
I would have liked to have done this outside or Lipo in a Lipo bag for safety.
Glad I could help. Yeah, outside is better since there's some nervous moments there if this is the first time doing it.
Great video! This helped me a lot! I thought I had to throw away this battery, but it is now functional again. Thanks.
Wow thank you so much. I’ve been trying to resurrect this $200 battery for the past four days after watching your video and trying your method it is fixed. I really appreciate this video.
Does this work for a little 2S 7.4V 650mAh Dynamite with a 1C charge rate? I bought the IMARS D300 but it doesn’t have an EC2 adapter (only EC3 and EC5)… I’m also confused because when I charge the is battery with a usb charger that came with the Mini T2.0, I only charge out of the tiny white balancing port.
it did the trick, my battery flat out to 0.53V, it took 1:30min for the cell to rise up to 9,6V, switched to lipo charging and it just went alive again.
thank you for the great tip !
It's unbelievable in 2024, they cannot make a battery that will recharge when it's dead. I tried the NiMH trick with my charger and it didn't work. I guess I can drop another $130 for a fancy pants charger, but then at that point, a new battery is cheaper.
I have a 3s 11.1v 2600mah lipo. Had some issues charging the other day, when it gets to around 50-55% charged it completely stops and won't charge any more. It's a new charger I'm using so not 100% familiar. Any ideas? Can provide more info if needed
Does this work for Li Ion too? I have a 48V electric scooter battery that sat for too long and won't charge. Can this potentially recover it?
Once a lipo goes that low the damage is already done! What your doing is dangerous throw the battery out its not worth a fire! Theres a reason the charger wont charge it! Its dangerous!!!!
The reason most charges won't charge under 3.2v is they allow non-balanced charging. Because of this, they count volts and divide by 3v to guess the number of cells and know when to stop charging.
My Gens Ace charger charges even though the cells are at 1.5v each. I've done it many, many times and the batteries still perform as new.
Still of course, exercise caution when doing this and monitor a saved battery closely. And only use high quality lipos.
Hey James hanks sr, not necessarily true. No arguing, a dead cell whose chemistry is altered to the point where it starts to 'puff', should be properly disposed of, immediately. The scenarios in this video, though, do not typically cause permanent damage that is irreversible. Following the directions Francis provides, a dead battery can be safely charged with no ill effects. He did caution against leaving the charger unsupervised and gave guidelines on how to prevent it from happening in the first place. While, I understand your concern, I feel it is likely misplaced in this case ✌
@@jerryvolpini7987 well you do what you want i’ll be safe and throw it out
@@jerryvolpini7987 agree to this. The safety measure on the charger is there for a reason. I work in the business with lithium cells, every battery management system is designed to prevent charging once a cell is below a certain voltage. To say it simple, there is a chemical process, that starts at the low voltage and causes an internal short circuit. So to be safe, discharge the battery to 0V and dispose it.
OK so once it isdone Running my drone. recharge it. DO NOT unplug and re plug and start flying again. Ordered a New charger cause it wouldn't charge and Popped, smoke.
WOW BRO !!!!! You are Awesome!!!! I literally had a 3S lipo battery that stopped charging 2 yrs ago and your EXTREMELY informative video just saved my Lipo battery THANK U THANK U ...that was absolute genius!! I would have never ever thought to try it on NimH ...it totally worked exactly like u said 🥳🥳🥳🥳
I am charging my airsoft 3s lipo right now but im doing it differently, im charging on nimh each cell separatly to arround 4.2v (at 2 amps) then i charge each cell right after nimh mode with lipo setting at 2 amps, then about 100mah later and each cell revived i will charge it normally with balancer.
I have a dead gen 2 Spektrum 5000mAh 3S (integrated balance wiring) and a Spektrum S2100 charger...any idea how to accomplish what the "rescue" with this setup?
I too killed my 2 5000 mah 3s 11.1v batteries (plugged in over a week) stone dead no volts at all
Boosted them for 30 seconds on a regular 12 volt 2 amp car battery charger(plug started to get hot)
Then put directly onto the traxxas charger Worked perfectly
Love the videos ! I'm trying to fix a dead battery. sky lipo 2200 4s. at + and - reads 3.8 volts. I have a skycharger B6ACO. I try to charge as indicated NiMH and getting connection break error. I don't understand how I can read voltage and have a connection break. could you recommend something? do I cut the battery open and check wiring? or is there some internal damage? the battery is in excellent condition and this problem occurred sitting on the shelf. I'm a auto technician by trade but have never played with a lipo. I have other lipos that have swelled up and I'm sure they still have some good sells in them. I'm very capable of battery operation , but would rather fix this if I could before i tear it apart. You seem to be the guru of batteries on the tube!!!! Anything up your sleeve for this problem. Thanks Jeff.
Thanks again for your help!!!
Gr8 info and glad I subscribed to u cause u got the BEST RC videos out!!!
I would like to ask about my sons RC.
It losses power even full charge. Already tried to buy new battery with a high MAh but when I connect it on the RC car it will rotate the will for few sec and it lowbat. Hoping for your help
I had an incident with an RC plane which I did recover from the woods only after a couple of days.... the battery was still in the plane connected to the ESC.... battery looks intact absolutely no visible damage.
However - none of my cell checkers recognize the battery. They don't show anything... have not tried yet with my smart charger though. Wondering of that battery is now drained below critical level?!
Thank you so much!!! You just helped me to save 120$ and I’m so glad that I found this video! Best regards from Germany :)
Wish this worked with every charger I have the gens ace and it won't do it and I can't charge anything just keeps saying check ballance port I used like 2 times lol so I wouldn't suggest anyone buying the gems ace lll
But what if I got them crawlers batters n just the chargers that came in box??
Then you need to go back to high school because you have no clue how English works.
@@JakobJakob1 batteries ur right what’s batters????
Spectrum smart batteries are shit. I paid 80bucks for my so called "better" battery. But no, i assume the bms failed and slowly kept on discharging the battery, also note it was in storage for a year and I stored it at the recommend 3.85v per cell. I have chinese batteries from 7 years ago that still run fine.
Before I watch the video I will tell you what I do.. Now anyone who does this does it at their own risk but you can charge your lipo battery on nickel metal mode for a few minutes to bring up the voltage..Then charge it like normal in lipo mode.
Spot on.
My new lipo cell shows 3.7 voltage which is right but it has no current. Not even for a LED. Charging circuit says it fully charged. Maybe it just checking the voltage not the current. Is there any way to breath life into it.
Will this work on a 6s battery? Don’t want to spend over $200 on another spektrum 5k mAh battery lol.
Thank you so much!!! This just worked for me!!! great video!!!👍👍👍👍
Could I do this for lithium ion battery for my electric skateboard that ran out. It’s for the backfire zealot If you could get back to me on this, that would be great
Can you do this with the G2 spektrum charger and G2 smart spektrum lipo battery?
I did this but it didn't work. Instead now my hitec x4 displays "connection break" and I can't get it to work again. I've tried new batteries, new balance board and new cable. Help!
I was replacing the connector on my battery and short circuited for 1 second or maybe slightly more, I've short circuited alot of batteries that was still alive but this specific battery just died, it won't charge nor power my rc car. Any solution?
*You should touch the battery too and check for over heating.*
We all hear that LiPo, s can be lethal and to over discharge a pack will harm or ruin it. Yet we are willing to try this. It's stupid, it's possibly a waiting game before it catches fire ir puffs etc. Its OK saying connect a volt meter etc to mo itor but again why be In that danger area. Thought the correct advice from a experienced user would be to dispose and learn from that for next time
I have a question so I have a 3 s LiPo spectrum battery and it's fully dead can I use those 3v usb charger to charge
I have a 3s set it on 1a and it won't go past 7.92 any help?? Battery only used like 4 times and now won't work. I have it on nimh I'm very new to this. Thanks
My so sons 2s has been sitting for a year. I’m going to try this thanks! I have a spektrum smart charger I believe I have the same capability.
My battery is a 3s and when I start charging in nimh it is already at 10.88? Is my battery just junk then?
Unfortunately this did not work for me. I just got a slash and it came with a dead battery with 1.4 volts. I think she’s toast
I have old macbook 2009 dead lipo battery , can i do CPR for it using this charger?
I've spent nearly 30 minutes trying to charge my 2s battery at 1a which wouldn't work then at 2.2a which started working but was slow. I've achieved 4.90v so far (i need 6.4). If I up the amps to 4-5a and watch it like a hawk like I have been, is that safe? What's the worst that could happen?
If it doesn’t fix itself within 5 minutes, there is probably a dead cell. You need to connect a balance lead and check the voltage of eac cell. If one is at zero, battery is dead
Is there any other way to recover a dead cell lipo even without that expensive charger tool, meter reader with a bunch of bells and whistles? My charger is just a simple one, it goes green when the battery is full.
What kind of a psychopath leaves a lipo battery in their car over night?
After use My lipos always go straight into storage charge, then into a lipo safe bag and put in a big steel box away in the garage.
Thanks for this video , I am able to revive my 3s lipo from 0 voltage to charging it now 😍
This is what i was looking for! 'Force' the charger to charge it...I hope I can save my pack now.
Thank you so much, this vid saved my Spektrum smart battery.
holly shit you just saved my battery ,,wow thanks!
$100 saved
I have to try this my battery is so dead and it was not in my rc truck just on a self not sure why it won't charge but I'm going to try this out
I just watched a video from you that you released 3 years ago. I had a question, but figured you won't respond after that long. But, here's a new video from 2 months ago.
I did exactly what you pointed out in that 3 year old video, and the battery started charging. But, here's my question: I forgot to disconnect the battery from the RC car, and it was there for 6 months, maybe even more. I have 4 batteries, 2 of them 8000mah, 11.1V, and the other 2 are 5200mah, 11.1V. 3 batteries I was able to charge, but the one in the RC, I couldn't until I watched your videos. How damaged my batteries are? After watching your video, I didn't charge my batteries, I tuned it for STORAGE mode. How long can they stay after they were all tuned for storage mode? And, if none of my batteries show any sign of swelling, does it mean they're fine?
Thanks!
6:36 Forgot to turn off my what?? I have a feeling this dude's camera died/ran out of battery 😅
Damn still said to low to charge :/ got out of the hobby for a year and my battery is dead.. FML
Awesome advice, did exactly as you said and it’s working fine, thanks for sharing, love the channel ❤
This video is very clear and useful! Helped me to save my dead LiPo battery.
You can plug the balance lead into the second lipo charging slot to observe the cells voltage
What is the charger you are using. Can it be done on a Traxxas EZ-Peak.
The video starts at 3:10
That's exactly what I was going comment 🤣
my is 4s but charger show 15.7 and won't charge... any idea?
Thank you for saving my battery! Awesome information
great video! thanks for explaining
It also turns out most Lipo chargers like this built in function that allows you to output a steady voltage to the charging port to help slowly jumpstart the battery
My 6s battery when plugged into my charger shows it as a 5s but with two separate independent battery checkers it shows it as the 6s that it is. What do I do in this situation?
man ...... thanks a bunch ..... i can go to comp tomorrow.....i though i fried my battery
It worked for me but it only lasted on the battery for 1-2 minutes of flying if that
Not really what I was looking for, but idk why my rc car dies fast it has a lipo battery not even really a whole 2 mins it dies
Can you use this method to recover a dji mini2 battery that discharged from long storage?
Can't you just set the NiMH voltage to "3.3*cell count"?
Right at the end it happened . The video was playing and right in mid sentence it
This is so rad I was so worried I wasted a battery it’s fantastic he shared this information for free 👏🏼
what if I have a 3S battery with one cell at 1V and the other two at 4.2V? what can I do?
Hell ya this cured an issue with a newer battery I have. Will it be safe to continue to use a normal. It has no signs of swelling
You aren't supposed to throw any batteries into the trash! In some places it's illegal
Great video but what about with the Traxxas charger and batteries?
Just had this happen to me, I tried what you said in the video & it worked. Thanks 😊
I can just kiss you right now..! I tried it, used the video as a guide and works.!
I have a spectrum battery 5000mAh 100c 6S 22.2v won’t charger and I has one cell at 0 and the rest between 3.953v to 3.963v I try this method but still nothing could u help
Unfortunately, your battery has a dead cell. There is no way to save that.
my battery doesn’t get detected but its new never used but its been sitting for a year
I have a Holy Stone 720E drone that i left with the battery in it for 3 days in the car like an idiot.The temperature was about 36 to 38 degrees celsius, so in the car was much more hotter. The battery is not swollen, doesn't seem damaged, but it doesn't charge at all and the drone doesn't work with this battery. The second one that was separate is still working. Any chance to revive it. Is a 7,4v lipo. Thanks
Ooof, hard one cause we can't tell if if it's damaged or just discharged. If you can find the positive and negative, you can slow charge it with an rc charger as NIMH for 30 seconds to see if that wakes it up.
But at the end of the day... not worth it for most folks.
Spektrum 4s Smart G1 - Only 2 cells showing up at 2.95, 2s not registering at all. Was used as 8s the other identical lipo is only 3. 77 all 4 cells. Will this work if 2 out of 4 cells dont show up at all?
Yes it worked🎉🎉🎉 4s lipo went from 9.39v to 12.43 in NIHM mode at in about 1 minute. Then all 4 cells registered again and switched back to Lipo mode to put into storage. Thank you Francis!
Thank you! Saved one of my LIPOs!
I find your videos very helpful and easy to understand..thanku!....and by the way.. Has anyone ever told you that you looked like the country singer ...neil mcoy? Lol
Not yet! I'll look it up.
Thanks for posting this, this info is worth gold! 😎 👍
My question is, will this still work when it's only one cell that has dropped way below the 3.2 mark? I have a 6S lipo which that happened to, a CNHL 6200mah 90C Racing Line lipo, not cheap lol. I was almost just gonna remove the bad balance lead & rewire it to a 5S (1x6 connector) and use it as a 5S lipo.
Thanks again for posting this!👍
Yes you saved 2 batteries for me! Thanks!
Man this helped so much. I was prepared to buy a replacement battery when I found this video. Quick and easy fix thank you.
After reviving a dead lipo, is it not going to perform as well as it used to?
I have known about this method for a while, but thankfully haven't had to use it much. I bought 4 batteries from a reputable company about a month ago. They were 5200mah 4s 80c packs. Wouldn't you know that every single pack was dead! I mean too dead to even power the cell checker. I had never experienced this many dead packs in one sweep before. I was going to throw them out, but I couldn't help trying to revive them. End result? I charged and balanced all 4 packs! I also discharged them at 5 amps, charged again, and then discharged at 10 amps! I'm shocked honestly. No telling how long they were dead before I received them, but here we are.
I think I cant save mine becaus its a 3s lipo where 1c is fine 2c is zero and 3c is fine
Thank you for this, you saved my lipo, much appreciated...
Glad I could help
Bravo 🥳 I tried this and so far it’s working!
What do you store a 4S 840 95C at? Thanks.
What worked for me was jumping it off of a Milwaukee battery pack and some old TV power wire tapped it twice and my charger started working again
Pretty scary but cool idea!!!! If you had a meter on the balance plug, you could see what was happening and it would be less risky