18650 CID Reset ⚡ DON'T DO IT! ⚡

this is what is needed so it becomes clear what is acceptable and what to avoid at all costs

4 years later and this info is still valid. Thanks for not deleting it.

2018 - 2020 :) Tried it on a dead 4 cell battery pack. (not used a lot and lay in the shed over a year sadly 0 volt.) Popped the CID back into place and they all measured 2.x volt. Charged them slowly with 200mA and raised the voltage to 4.2V. (inside lipo bag) They stayed cool to the touch and now they work like they are new again but like any other lipo li-ion they are monitored and replaced as soon as they do unexpected things. As far as I could find out the CID was invented after a bunch of 18650 burnt "down" a plane (while on the ground) so, safety is cool but it's not uncommon that batteries form a small amount of gas due to chemical processes, and yes! pretty fast if charged or depleted incorrectly. Anyone using LiPo's in RC knows this and these are even more dangerous than Li-ion.

Yep, i have to agree with you on this video. In the last couple of weeks I've been researching and studying these 18650 rechargable batteries. I've watched a lot of videos on how to recharge a dead/ no charge battery but none of them show a long term or long term useage or the problems that could arise. You video here is gold and solid advice to all. Why? Because as you said, these batteries lost their charge for a reason, plain and simple. You video here tops my charts and i think is the best advice to everyone. Thanks.

This is an excellent video. Typically, they don't recommend attempting to charge ANY lithium ion cell that has fallen below an open terminal voltage of 2.3 volts. Any commercially available charger has a built in threshold voltage under which, for the sake of safety, will not attempt to charge. In use, they say to cut them off at 2.8 volts. my designs cut them off at 3.2 volts. You still get well over 90% of the battery capacity, with enough of a margin, that it can sit for a while. In a radio controlled model airplane, cutting the main propeller at 3.2, leaves enough in reserve for flight surfaces, for a controlled landing. I typically cut the charge at 4.16 volts, rather than the full 4.2 volts, just to improve the cycle life of the cells. you still get 85-92% of rated capacity. By limiting the charge/discharge voltages, batteries last much longer, and are more safe. As far as this experiment, my results were exactly the same as yours. If you pick up a cell that shows 2 volts or less, it's ready for the recycle bin. Voltage balancing during the absorption charge is a must! Any time multiple cells are in series, it's imperative to have voltage balancing to guarantee that no cell exceeds 4.2 volts while charging.

Thanks HB. I don't know if it was mentioned that if the CID were to be damaged by jamming a screwdriver into it. Could render it "stuck closed" and not pop again when needed second time around. Great video!

I have a full pack of dead cells going into the recycle after watching this video. I checked the voltage and all under 1v from a scooter pack. looks like water had gotten into the BMS. I have plenty of faulty Makita packs with good cells. This will be my first project and thanks for the heads up.👍

I've been looking a load of videos that say this is a great way to revive batteries but I've been thinking there must be some reason this safety device is there. Thanks for making it absolutely clear that this is frigging dangerous, your video may well have saved me from a very unpleasant accident. Cheers Mate

You have effectively added caution to my actions. I was getting ready to pop the CID in mine and have decided to solder in another cell instead.

Interesting experiment! I have done nearly everything with those harvested 18650 from old laptop batteries. I tried to bring them to explosion (in a save environment outside) just with overloading, short circuit etc. - ended up only heating the cell up to probably 100 deg. C before the CID popped. I never resetted the CID. When a 18650 is behaving like here, it is internally massiv short circuit and has quite high of an internal resistance (it wont take much amps when trying to charge) but it heats up due to internal resistance and short! Anyway i found several cells very close to 0.0 volts and succeeded in recovering them to a certain extent. They tend to heat up on first charge quite a bit, so they must be under permanant surveillance in a safe environment, but after that first procedure they seemed to take a charge after having cooled down again. On the second and third try they didnt get that hot any more and kept their voltage for several weeks! They are still bad cells but i found a few on them that seem to recover even more after sitting for a year with mediocre charge. One of them only drops its voltage maybe 50mV in a month - which is quite reasonable for a bad cell. A good cell keeps its charge for years tough and i have a few which only show a selfdischarge of 10mV a year! But anyway - some of them can be reactivated to a certain extent. But i wouldnt recommend to do so, as they can behave very unexpectedly and can be potentially very dangerous! Never use such cells in your torches or e-cigarretes!

9:38 Heat from the internal short circuit by the dissoluted Cu colector . Copper dissolution and deposition during overdischarge and the formation of internal short circuit.

Some videos all over the internet concerning lithium ion and li-poly battery. Others just pretend to be electronic techies that are actually electronic junkies. They simply do not know what they are doing. Good info fro them. Hats Off!!

Great video. So many people trying to do this. DON'T BE STUPID. All it takes is one person to cause a fire, property damage, personal injury, etc and we'll get more and more regulations piled on us.

Bullocks, I've been doing this for years. Of course I have no depth perception and I shake hands with my left. Good vid!

Well done mate. I've had soooo many 0 volt cells, all to the recycler too!

Great job Pete... Yup, it's dead. I'll also echo the rule that if the CID's popped then the cell simply goes into the recycle bin without fail. What is surprising is that all of the cells CIDs popped - this is surprising, because if one goes then power stops flowing through all of them. I have revived some zero volt cells with intact CIDs successfully, and appear to be quite healthy. Agree the TP4056 is good for doing this, so it prompted me to go through my rejects pile that the Opus didn't respond to, and I managed to find a handful of cells that could be revived... yay!

Hi Pete. Thanks for pointing this out to the community please don’t feel silly about this video, it is essential that others learn and don’t get fire trapped, in my opinion it is far more sensible to do due diligence by obtaining spec sheets on cells prior to purchasing them, too many people seem to be tempted into buying cheap lightweight shit.

Awesome video! I learned a lot, even if it was not succesful. More about the 18650 cells, what to avoid, security stuff ,etc. A very constructive video. Thanks for share it!

I recently found out you should not beep test across a battery as it can damage that part of the meter. That part is for Resistance only. when you go across a battery or cell you are allowing it to discharge through the meter.

Oh my.. thank you... I saw this video first before trying to repair my dead rechargeable 18650 batteries.. God bless Sir you already save me from harm..