0v 18650 - How the CID works 

I heard a hiss come out of mine as I was doing this. It went 0 Volts to 2.32 Volts. Very interesting... To the charger I go with it now. Thank you for this informational video!

Such a rare moment of experience, when a youtuber is actually really useful and makes all the difference - thank you very much!

Love your simplicity and openness man. Great find.

few of my 0v 18650 cells were already in the dustbin, moment I saw this video I pick them back up and they are now back to life! Big thanks!

It's really awesome video. This video is more sharp than any videos that is recovered from 0v to its original capacity. Thanks a lot!!!

Excellent finding! Thanks for sharing! I know it's been almost 5 years :)

Thank you for the knowledge, I knew there was a safety device but nothing more. I know Li batteries can be hazardous so I never explored them. I still will not reset the device, but I like having the knowledge of what likely happened if it tripped.

thank you it is good to know the basic of recovery .

Interesting to see this feature on the 18650, thanks.

Thank you for illustration the whole idea.

Thanks for the video. Very useful information. @2:48 You reference papers you've seen about the CID, could you share which papers these are or where to find them? Thanks

It's a very useful video help to rescue 18650 battery which unable to charge! Thank you for sharing.

Warning! That disk shows that the cell overheated and is no longer safe. The cell was either severely overloaded or had an internal problem causing it to build up gas pressure. No matter what caused the problem, the cell is dangerous and should be disposed of, and quickly. You are literally playing with fire. The cell chemistry has been altered and the cell is no longer safe. There’s a reason for the protection circuit and the vent release and it’s not to remove them.

Best video iv watched for a while amazing find there I'm just repairing a work colleges drill battery and found half of them are 0v thanks for the info

AWESOM. I have also awake a lot of cell by applying this mathod. It is effective when the cell is completely showing 0 volt. Very good explained.

OMG maaaan, thank you so much. Been busting my head for a week now to why few of them just died suddenly

You sir are a hero! Lol. I was about to cut into my LG cell and decided to do a quick search. Glad you did this man! Thank you!

The most accurate and detailed video about reviving 18650 long sitting almost dead lipo battery...i've seen many videos abou it and tried the same technique but couldn't get to light up a single led bulb...my issue was i don't have a multimeter at hand and tested my 6 dead batteries on a led bulb and a couple of other small light sources, didn't work so i am about to thriw them away for shit, THEN came along this great explanatory tutorial that actually shows how they work inside the positive pole, and that is what i was looking for, seeng what's inside and the functionning of it so that i can figure out a smarter way to revive the battery... Pheww, just getting pumped up now on how to properly get that bumped up cone to go down and hopefully reviving the cell battery...im about to try the led again right now and hopefully it will work out as intended... Thanks again

thank you i just saved 2 vape batteries and am pissed i threw away like one hundred dollars of them in the past like 10 years. i clearly over charged them all back in my day. but this taught me alot anyway, thankyou brother.

Very useful tip and advice. thanks!

thanks for the post. I've run across this many time and I have just sat them to the side. Now that I have a good idea what the problem is I can attempt to get them back in service. Here's a idea if pressure tripped the safe device, use pressure to reset it. I'm thinking about 1 to 3 psi should be enough.

Great discovery i recovered a dead 18650 and its working now. Thanks and I appreciate your video

I've been tweaking with my 0v 18650 2p pair from my laptop battery for 4 hours, I tried putting it on charge and everything, this was the problem, thank you, now I don't have to spend to get a new battery, I understand the risks involved in using such a battery but it is what it is

Thank you very much! Same problem, same cells. I will try for sure.

Warning: The Designer of this batteries have build in this fuse for security reasons. When you disable this fuse the battery will work, but no insurance will pay any dollar, when you burn your house with such a repaired battery.

I was charging 18650s with a phone charger and being careful and throwing away ones that behaved different. A guy kept borrowing my batteries and bringing back junk. I charged one about 5 minutes and it was already getting warm. Took it off the charger and set it aside. About 2 minutes later I heard a noise and the battery was shooting flame from the negative end. It was spinning and hovering like a firework. It was loud and grey dust went all over. My Chihuahua Yoda was trying to get out of the room. It seemed longer but it probably hovered spouting flame about 10 seconds. Never accept a battery from a tweaker

Very revealing. Thank you for sharing!

THANKS! Just messed around with a few bad ones I had, ended up popping the cell so cant use them but sure enough, it read 4v after it popped.

finally someone explains this, thank you so much

Great info I have over 35 batteries with 0 volts, will check them before recycle them. Thanks.

Interesting! I've been watching a few 18650 teardowns and I'm realizing that there's a lot more engineering in them than meets the eye.

OMG, this finding is awesome dude. Really thanks. I need to test the capacity of batteries just now revived :)

Interesting indeed. I disassembled a dead HP battery pack today at work, out of curiosity. It was farly new, and its counterparts from the same batch all had 95-100% of their capacity remaining. Turns out 5 of 6 cells popped their top. The computer in question just got a spare installed, and I hope the same fate does not befall that one. The screwdriver trick worked on all cells, but it remains to be seen if they are useful for anything.

I was interested to know the reason behind. You have explained well. Thank you.

Appreciate this, going to try 20 cells I overheated by over discharging today :)

I would recommend that if you intend to reset, and reuse these, you should at very least closely monitor their temperature during both the next subsequent recharging, and reuse.

Great informative video mate, cheers. As you mentioned, this may not be the smartest thing to do but do at you’re own risk... 👍 Just wondering if you have tried recharging these reset cells ? I have seen a video recently where the cell didn’t charge during the attempt but rather just got very hot very quickly indicating that the CID had popped due to an internal fault within the cell rather than it happening not by the fault of the cell but as you suspected, a fault of the charging system maybe overcharging the poor cell causing it to pop. Just interested !🤔 Thanks. Well done 👍

On my protected 18650's that had "popped" the protection button, I hold the bad one to a good one positive to positive and connected the negatives with a small wire for 5 seconds to reset the protection and they usually always reset and start charging.

That pressure buildup release sound was stunning.!! :)

Great video!!! Thank you so much, bro!!!)

If you can keep your local fire department in your house, feed them, give 'em sleeping bags, let them shower, borrow your deodorant, etc. this method is terrific. But...and you knew there was going to be a but...these 18650's are great because of the current they current they can hold, and if that current decides to short through the Lithium, your potentially in big trouble. On January 7, 2013, a laptop Lithium battery overheated (in a crate of them) and started a fire in an empty Boeing 787 in Boston. It wasn't flying at the time. Popping the CID is now a standard find on almost all Lithium 18650's in large part because of that accident. They found a way to make them safe. Please, don't undo that safety mechanism. Unless you can fulfill the first sentence above.

Great find. Was having the same problem. I wonder if the process of removing them from the pack is also putting alot of force on the tops adding to the metal popping out. Should have watched the vid all the way thru. About jumped out of my socks when one hissed like yours did. Samsung IRC18650-28A. 2BC1 here

that CID acting as a fuse to the battery means that not recommended to use anymore

thank you very much bro, great share!!!

This work for me.Thank you!

The CID is popped for a reason, charging these batteries will eventually cause a fire. A short-circuited 18650 can heat up and ignite even when not connected to anything if you reset or remove the CID.

Thx bro, u answered all my Q's. Ur mind works like mine, I just needed to understand was going on.

That was really helpful, thank you!

Thank you. It's true. I can recovery many of my 18650 battery. If I don't see this video I don't know what to do with it. (when I use screw driver press to the hole I hear the sound like air come out and then,when I check it the voltage was come back) I very happy.

Great video. I'm rebuilding Makita 1.5 amp batt. Will this work if the batt shows 2.5v or just if it shows o? Any tricks how to remove the batt from the tab without destroying the tab or the battery

Hi mate, I have started my own rebuild station in my older timer mental regime~. Many of my rebuilds are on Vanon 'Knock offs' of Makita 3.0 Ah / 4.0 Ah / 5.0Ah / 9.0 Ah and found the similar battery cell in each. The cells all weighed in at mass =

Russian roulette with batteries, nice concept

Hi. Very successful. Thanks for information. I have a 36v 4.4ah hoverboard battery. The battery is shortly green, but not charged. Can I run it like the video? Thank you.

great explanation videos, thanks ...

exactly what i'm looking for.. thanks for the video

Wooden toothpicks working pretty good too! And no danger of shorting with negative pole 😅

Thanks for this info , useful , but these resetted batteries should be used with extreme caution ! Can cause damage to life and property ! Li-ion are so fire prone !

That's right, it's called protection not to explode when it has more consumption than it supports

Moments ago, I seen a video where the guy inserted a syringe and it restored voltage. No comments were allowed and no voice to explain what's going on. So I thought it was just a hoax and unliked the video. Thank you for the explanation and for allowing comments and for the education.

That's brilliant, you have saved people a lot of money even myself,it's funny how people are jumping on your band wagon and showing this over youtube, your the star here and brilliant, loved your video kind regards colin from croydon surrey England 👍 👏 👍 👍 ❤

Finally a good explanation of this situation

Thanx,, this was great info...

WOW, many many thanks it worked for my SAMSUNG battery...

Thanks for the explanation/breakdown. Prolly save about a quarter of the cells ive been collecting. Of course the safety trolls are gna troll. People can make their own decision on whether this is safe for their application/battery. Its a "proceed with caution" thing IMO. Ive actually had a small, 250mah drone cell go critical on me from overcharging after gas buildup inside. It blew and burst into flames right behind me, luckily, so I had it smothered in seconds. Burned through just about everything it touched tho. Lot of damage for a tiny little battery. Keep an eye on them if yall try this, watch closely for continued gassing and/or heat runaway.

Great video mate great to know about this

Excellent. Thanks for sharing this info, amazing. Just saving them for things like making light decoration for Christmas with some standard LED's where you not gonna stress the battery and it just helps cut cost of your projects.

Thanks it worked with me, found it helpful.

Great find

Hiciste lo que nadie o casi ninguno ha hecho en los demás videos... Sacrificar una batería para hacer ingeniería inversa y encontrar el problema de raíz. Te aplaudo y felicito por este video que demuestra que hasta este momento (para mí) has sido el único que ha hecho lo correcto.

Seems like the wire back to the spot but no power is provided. Once I popped down the positive touched the base getting contact but not enough to provide high power output. Otherwise is back but useless. Should we try soldering to get better contact?

I'm afraid they have a design flaw like the circuits in some situations, but "it's safe enough" and it's a good idea to get some good 18650 out to play with and replace the laptop battery pack sometimes.

wow ..this is a great discovery of the year

2021, O.K. Managed to do the same results re depressing the inner POS push-out to go from 0 VDC to 3.76 VDC. Is it safe to solder a a braided 18 AWG to the inner exposed contact without being to close to the lithium ? Can't use any contact to bring the POS contact beyond the top of the base without heat shielding (teflon). That is, can I solder a lead (18AWG braided) to the centre of contact we pushed down to remake contact with the 186..to bring the Lithium back 18650 POS lead accessible for use as a standard 18650? BTW thank you..two LT batts bit the dust on the two centre 18650 bat falsley going to zero VDC.

Thanks for your efforts 🌹

Great informative video

This is a great video!

usefull info thanks ! gratz from qc canada

Thank you for your video. I’ve noticed all the videos show the red probe on the multimeter touching the positive terminal of the battery to show the zero voltage. But after the procedure of popping the little cap back in you all, put the black probe on the positive terminal of the battery to show the battery has voltage! How is that please, why the change on the probe? Excuse me in advance if my knowledge is limited, thanks for your time.

Is this a feature from 18650 cells? I heards this is the metal playe that ruptures to vent..

Thanks so much for this video!!

I have a pile of those that I thought were just bad Thank you for the insight

Great video, thank you. Now i don't have to get curious and pop one open myself

You're awesome! I have an 18650 I left it in a vape mod for over 2 weeks and it was almost ready for a recharge when I left it. Just last night I tried recharging it and it was totally dead and would not recharge and showing no voltage reading on my DMM. After seeing you vid, I tried to stick something into the vents of the top cap but I could not find anything small enough that wasn't sharp like a needle. But tonight I found a little old flathead screwdriver and was able to fit in inside the vent holes and push down the popped-up diaphragm like you show in your vid. I was a little startled when it released the built-up pressure, but it was only a split second. The battery is now charging. My only fear is why it built up the pressure to begin with. I have left 18650 batteries in stuff for for extended periods of time before and this never happened. I'm almost afraid to use it. But I am so glad your method worked! BTW: Nice Harbor Freight DMM! LOL I have a few myself.

thank for showing me detail

Thank you. For the great video

These purple cells are actually pretty special. You have to charge them at 4.3V to get the full capacity (so a standard charger won't work). Only then will you get the full capacity (rated at about 2800Mah). Check the datasheet for purple Samsung (ICR18650 28A).

If they vent or hiss, doesn't that indicate an electrolyte leak ? Should you junk the battery if it released gas? I would think if the safety mechanism is based on pressure that a puncture would prevent the safety device from working. Also charging it may cause bubbling of the electrolyte and maybe a fire???

Thanks it's realy work for me !!!! (AWT 18650 40A 3000MAH)

very good video, thank you so much

I have used that trick on several of my 18650 batteries and they started hissing. When recharging them now, they get very hot. Proceed with caution here when disabling the safety feature of an 18650 battery.

I just did 2 battery after seeing this and worked great thanks so much

Well explained thank you sir now I can revive my lithium batteries fast and easy 😊

Too bad you didn't make many other videos about 18650 cells, this video is great!

Thanks. but isn't it dangerous because of the gas or leaked fluid? Might contaminate the other batteries or the case.

with your experience the cell will not back to the same situation again?

Greetz, What are the consequences (in terms of further use), if you accidentally vent the battery ? Meaning that you hear a hissing noise - like yours did @ 09:47. 🤔😐 Some suggest/claim that the battery cannot go back into protective state anymore. Ergo if something goes wrong (during charging or discharging) it can explode. Can you elaborate on this please ? You can also add links where this is thoroughly explained. Thanks. Best Regards. 🙄

Thank you for explaining how that cap works. It was very useful for me.

Thank you very much friend for this really instructive video. It´s the best on this theme !!! I used this procedure several times but I didn´t know how does it work. Because of that I damaged several cells by puting too much presure and not in the wright point. Thank you again !!! God blesses you !!!

This is freaking AWESOME! I repair so many battery Thank u

YOU SAVED MY LIFE I LOVE YOU