Revive a Dead 18650 Works For All Types Of Li ion Battery Cells

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Published 2023-04-23
If you're an avid user of electronic devices, chances are you've encountered a dead 18650 battery at some point. But before you throw it away, why not try to revive it? In this video, we'll share some tips and tricks on how to bring your dead 18650 battery back to life.

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All Comments (21)
  • To revive battery cells that are below their permissible voltage, you should use special charge/discharge chargers (e.g. SkyRC MC3000) that have a refresh mode designed for this purpose. Their method is extremely dangerous! In addition, such a deeply discharging battery cell certainly no longer has the specified capacity
  • @rhiantaylor3446
    A cell showing less than 2.5v can often be brought back to life by passing a small current of 50 to 100ma until it reaches 2.5v, at which point normal charging can resume. By following this video a high and uncontrolled current will flow which is likely to reduce the future life of both cells. Do it properly or don't do it at all.
  • @StarfireReborn
    I Appreciate This Video, And The AMPLE Warnings You Give. I'm Not Certain Why So Many People Seem To Be Giving You A Hard Time... It's Like Safety Has Become Priority To Living Life These Days. Keep Building!
  • @slavkog
    Wow. Didn't think of this. I had a cheap Chinese lamp running on this 18650 battery that won't charge. The problem is, I later figured, the cheap Chinese stuff doesn't have proper charge control and lets the battery discharge too much too often. No matter what I did, i couldn't get a blue charging LED on! After your clip, i got an idea, dismantled an old laptop battery (got the best out of 6 18650`s in there) and solved the problem with the lamp. Thanks man!
  • @narrysingh8313
    The pen type tester you are using where can I get it to buy and the cost
  • @LALATheClown
    This is a good way of doing it. But if you have two good working batteries. I find also just putting the positive to the positive with one battery in the negative with the negative of the other battery. And making like a little battery sandwich seems to work too. Of course is depending on how badly the battery is damaged
  • @adzinoolol
    While doing this will the healthy charger go down in voltage and the unhealthy battery go up
  • @ammaribrahimm
    Its really works for me, you save my life! Thanks brother!
  • @TheSevenCircle
    Thanks a bunch, I had two Li ion batteries that wouldnt work and I knew that the batteries were charged. I didnt put the wires for 30 secs just like 5 secs and now they are back to life.
  • @garrett69
    I do not advise doing this at all. Once a cell has failed, this means either the chemistry has altered or there has been a breakdown inside. Charging a faulty cell from such a depleted state of charge could be dangerous. Even more dangerous when you actually use it due to the heat build up created by the current draw.
  • @fruitcup01
    thankyou,. Maybe also try charging at lower voltages with an adjustable voltage regulator say 1v then 2v.
  • @keithking1985
    Just had to charge my nephew's scooter battery with my lab-bench power supply. Each 18650 cell was down to 0.7 volts. It's sitting out in the press now charged up to 35.5 volts.. I hope it holds it's charge when I check in the morning.. (it's a 36v 10.4A 30 cell battery pack) It's never been low before so fingers crossed.👍🇮🇪
  • @davex2614
    I put my batteries in the charger and they would not charge. The red light was flashing after about 30 seconds. I have an older charger that I bought years ago and i tried them in that one and they charged normally.
  • after charged i can see in your video that dead battery volt is going down..if that going down after few minutes or maybe few second it will same volt as like the begin...
  • @ytbone9430
    Really? Pumping whatever juice the good battery has into the "dead" one, seems like the worst possible idea to me and I am sure many people will agree. I actually wonder, why there is nobody screaming down in the comments. Using a power supply with setting for max current and voltage to do this is the "right" way, if there is any. You can't just put the batteries in parallel, it gives a totally uncontrolled current flow from the good battery into the "dead" one. In your example the "dead" battery even got warm after a few seconds, this is already a sign, that it's way to much power. You risk having problems with the "dead" AND with the good battery. You can do, like you have shown, but only with very short pulses, not 10-20 seconds long and only if you put some resistance in between, some long wire, a light bulb or a proper resistor. Using a medium charged battery also is more safe than using a 100% charged one. I hope you be safe and the people watching this as well.
  • @jerichojoe307
    Are we forgetting about how rapidly it was discharging after he tested it with the multimeter. Yeah it might be able to jump start the battery, but it'll probably never HOLD charge again. Kind of like the batteries in your PS4 controller. Once those batteries go yeah they might actually take a charge and you can use the controller while it's plugged in; but as soon as you remove it from a charging source and simply leave it there for a few hours it's completely dead even though it hasn't been used. I'd get that 18 650 batteries are expensive, but once they fail they fail. It's pretty simple. Just buy from a reputable company and if it fails before it's listed charge cycle, typically the company will replace it instead of having people do dangerous shit like this 🤦
  • @genericuser4266
    Dead shorting them can be unsafe and generates heat. It's an unnecessary risk. I put a 100 ohm resistor in series (Can use smaller value down to about 30 ohm but may need to be higher wattage rating if you go below 50ohm. 100 ohm was just what I happened to have.) Neither battery gets hot and the dead cell, if it can be revived, comes up to a power lever recognized by my 18650 charger in about two hours. 18650 cells have an interesting chemistry if you're used to lead acid. They gain almost all of their voltage very quickly, and then have to sit near full charge for several hours on the 18650 charger to go from 3.6v to 4.2v. I check them again the next day and, if they're still holding charge, I use them. I should run loaded discharge testing but I'm just not that sophisticated.