DIY: How to revive a dead 18650 (or any) Li-ion battery cell
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- Опубликовано: 1 ноя 2017
- Check out my newest 18650 salvage video: • Revive dead 18650 batt...
Today I will show you how to revive a dead 18650 Li-ion cell that's being refused by the chargers. This method will work with any Li-ion battery, not just the 18650 cells. Here's my follow-up video: • Follow up video: Will ... if you wonder how much current (Amps) goes through the wire.
Note: this is not a permanent way to charge an 18650 cell. The point of this method is just to bring up the voltage of the dead cell to a point that is enough for a real 18650 charger to accept it and charge it properly. When a Li-ion battery does not have high enough voltage, the charger would not charge it. I think the reason is safety because if the voltage is too low, it might take a risk of charging a NiMH or NiCad cell which are only 1.2 volts each. And if you put a NiMH or NiCad cell (at 1.2 Volts) in a Li-ion charger that charges up to 4.2 volts, all hell will break loose.
Also: don't overdischarge a Li-ion cells down to below 3V especially below the threshold recognized by the charger. Otherwise, it will not live long. The "Goldilocks" zone for a long and healthy Li-ion cell life is between 30% and 90% charge. Too much charge or discharge would be bad for the cell.
I have made a detailed video on this. There's a lot more information on this new video: ruclips.net/video/yuLdi4oT7xI/видео.html
Electric scooter 🛵 🛵 and
Excellent video content! Forgive me for butting in, I would love your opinion. Have you ever tried - Lammywalness Trendy Trade Guide (erm, check it on google should be there)? It is an awesome one off product for learning how to recondition batteries at home without the hard work. Ive heard some decent things about it and my best friend Jordan after many years got excellent success with it.
There are several suggestions for getting a good result
never attempt to do this until you are sure what you are doing - the acid can burn your skin
check the voltage first - there may be a dead cell which would waste your time.
Check the battery fluid.
attempt to fully charge the battery.
(I discovered about these and more from Jons Mender Guide site )
Once the battery is fully charged, next find out what the capacity of that battery is.
@@familyguyandothergreatanim2371 z xxx
The lesson of the clip for me is: the use of the little magnets!
I am converted
Me too.
Using magnets actually work or no? Lol
@@gerhang3361 not on my meter. tips are made of 316 ss material
magnetz it making cell fixed then litum batte light now voltage ok
Using magnets to hold the leads is very clever!
I see this more and more. Started using it too, I hate screw or solder .. magnet are amazing
I advise you to check the resistance of your magnets with a multimeter, some have a coating with high resistance so they heat up
Magnets are amazing except on copper terminals :(
bro... get a stronger magnet... think super conducting... still wont hold it but what you are aiming for is a fall rate so low, resistance wont approach infinity in your life time :D never mind the impracticality of such a bat pack, or the substation connected to it
just build a spot welder
This is the simplest method that most videos describe, but I prefer a safer method. This way can make the battery heat up and explode.
I use a bench power supply where I can dial in the voltage and the current. I limit the current to about 50 milliamps, and then I gradually raise the voltage to the point where it starts to take current. Sometimes this can be as high as 30 volts. Once it starts to charge, I reduce the voltage to about 4V, and I turn up the current to about 100 mA, and let it charge for a few minutes. At this point I transfer it to a proper charger, because it monitors temperature and controls the current, shutting off when the charging is complete.
It's particularly useful for older cameras which have dead batteries which no longer take a charge, and the new battery is either very expensive or hard to find.
I've been doing it this way for some dead skateboard batteries. But I also recommend trying to blow up them batteries ;)
Those without a bench power supply can just use a partially-discharged battery to revive the deep-discharged one. The lower potential between the two will naturally limit the current and will produce less heat.
@@M0DB0Y why ? What is gained. ? What is lost ? or poisoned?
How can you tell if it's taking charge? I have a dead 12v lithium. Thanks
@@threeworlds My bench power supply has adjustable voltage and current, and displays both with 3-digit accuracy. I set the limit to less than 50 mA to start, and there's never a problem.
Great video, something else you can do to revive the cells is to set your RC charger to NiMh mode which does not have Low Voltage protection and set it at 0.1 amps, this will trickle charge the battery to get it above 3.0V and then you can switch it to LiPo mode :)
I do this trick at 0.1 amps using a bench power supply ... using NiMh mode is a great idea too ...
Very helpful thank you. I didn't gave any good 18650's so I used 2 AA Alkaline batteries in series and connected them to the dead 18650 in the same way you showed. Worked surprisingly effectively and only took a few seconds to bring the 18650 up to a chargeable voltage.
Real bcuz i don't want to my battery explode 🙄
2x AA cells in parallel with a deal li ion cell. Make sure all connections are solid and then take a walk around the block. Goal: determine the response time of the local fire department.
@@uhmgawa6533 Or just connect it for a few seconds and don't leave it's sight and it's perfectly safe
I love your accent / voice it is so soothing to listen to in a tutorial like this
I'm so glad i stumbled on this!
Didn't know you it was a voltage drainage issue, I left my batteries plugged in my gimbal once discharging so I messed up 2 batteries. I didn't know it was a voltage drainage issue with these types of batteries. I didn't have the right tools like a volt meter but fortunately 2 18650 batteries where charging so I charged one. The working 18650 connected to the dead battery through simple soldering wire i had laying around..When i saw the spark i thought it probably fried it..I got paranoid so i only did it for like 10 seconds or less.
Just like jump starting a car it instead the battery came back to at least 1 volt and the charger no longer displayed an error and begun charging the dead battery!
this works wonders!
You saved me having to spend 20 something dollars on new batteries and having to wait for shipping and cancel a video shoot!
Thank you!
Same i let the battery sit for a couple of month on the desk. Last time i checked, the battery was good. And now, there is just 0.100V inside. Don't understand.
Love the magnet idea 😉, that alone is a thumbs up 👍
For Anyone out there, I used this method with a dead AA NiMH rechargeable battery, and it worked as described.
This battery is a Li-ion. It's a different beast. I wouldn't recommend this to be honest, it would be more successful on a NiMH battery and if it isn't it a worse case result would be less explosive.
I've seen this method mentioned in other places, but I particularly appreciate the description explaining the _reason._ 👍 Far too many people just "give a man a fish" instead of teaching. 🤦
Your videos are gold...literally...watched your drone vid which gave me the guts to try what i had wondered would work...take my old ecig batteries and replace the weak lipo in it....works great using certain brands of batteries and waaay cheaper and safer than expensive over priced lipos.
A lot of the RC chargers have a power supply or 'smart charge' mode that will allow you to put any current you want through the leads. Super useful.
love the magnet trick - never seen that one before! Thanks!
My friend with the best accent ever ! So happy to stumble upon you again. As always great stuff thanks
Thanks for a very clear description of the process as well as the 30 second max charge warning.
Worked for me, thank you so much, some of the comments about corroding insides of the batteries have me worried, I will keep a close eye on them, besides that, my charger wouldn't charge them, now it does! A++
Thank you, saved 4 batteries that had been in a flashlight that was left on. My Opus charger would not charge them before I tried this.
you damaged ur cells in the process. leading to a shorter life span
I have watched this video two times now. I have saved around $120 with your technique! Thank you
This worked well! Thank you! I will say I held the multimeter on the old battery after disconnecting from the new one and the voltage was not holding- but is expected from a battery that was left dead for so long.
Using magnets instead of soldering for a short term connection. -Great idea!!
Thank you so much! I have an 18650 battery that won't charge so was trying to figure out how to zap it without ruining it. Your video is awesome and the tip about using magnets is brilliant! Now I can fix several different things I have that won't charge.
I tried. It worked. I had 3 expensive and near new 18650 batteries. All VERY flat from a big flashlight. All now charged. I tried 2 different chargers. Thank you.
Using the magnet for contact for charging ...... BRILLIANT....somehow I missed that one all these years......ty sir
you are the boss! i had one 18650 that had only 0.18v charge and its now back at 3.7v and working again thanks alot
BS
That's exactly how I did it and with a very similar charger. It doesn't work long if the battery is too dead but depending on what you need the battery for that's not a big deal. For batteries between 1.5-2.5v they can usually come back to almost perfect health. The older and longer the battery was discharging, the less likely they are to come back to normal.
Thank you for making a video on how to revive / rejuvenate a battery that is dead or no longer active.
I am terrible when it comes to anything electrical but I bought the cables & alligator clips shown above, followed the directions to the letter and boom! My left-for-dead 18650's are charging in a wall charger ... something they refused to do for 2 weeks! THANK YOU!!!
are they still working
Thanking you for this trick! But, I did my a face palm when you used the magnets on the clips! I love magnets but never thought of that.
An age-old problem solved!
Not a good idea. These magnets are coated with nickel and is not a good conductor compared to copper leads when charging at high amp rates.
@@furonwarrior unless you use it to keep them in place but still have full contact between the lead and the battery. How he had it wasn't the best, but it is a smart idea
I just did this and it worked great. I folded a strip of aluminum foil until it was about 1/4" and then tore it in half, I stood the 2 batteries beside each other on one of the foil strips, I laid the other across the top terminals and counted to 20, I put the battery in the charger and it worked! Thanks for the tip!!!
Excellent idea! :D
I figured this out myself, too. The electrically conducting magnet trick is the cat's meow. Thank you! Good stuff.
But does it holds charge??
Not usual for me to leave coments. But you rock dude! You have fixed my battery! Thank you so so so much for the good help! You are the best! Thanks heaps!!!!!
Oh my goodness! I followed your instructions and it WORKED like a charm!!! I have a 14650 Li-Ion inside of a plastic case and protector circuit (known as the LIP-8) for an old Sony Mini Disc. I had purchased that battery as an extra backup and failed to actually charge or use it back in the day. The battery was so dead it would not recognize. You got me going my friend - thank you!!!!
I like all your battery videos..very informative and straight to the point..subscribed.
Wow, your magnet trick is super useful! Thank you!
This just saved me some serious time. thank you!
Just curious; Do you know which battery more closely matches it "C".. !;!
Totally worked! Thanks man, awesome vid! Only took a few seconds for the charger to recognize the battery
This worked great for me. Thanks, you saved me a lot of money on batteries i was going to recycle
I never thought of just using another battery to recharge up a battery enough for a recharging, some great advise, thank you, I needed that. Also the magnets are such a great idea as well, I've already purchased some new small magnets just for doing this technique now. Again thanks a lot, Tom.
Thomas Fanning this is actually horrible advice dont do this
Hey great tip on the magnets
Thanks for this, saved the 18650 battery on my screwdriver!
Very nicely done, VuaEco! I like your easy-going tone and the clear explanation. Thanks for sharing :o)
The magnet thing is freakin awesome... that helped me more than anything!!!
Thanks bro! Learn something new today!!! Badass
Great Idea on using magnets to hold the leads. I hadn't thought of that.
the charger will not charge the battery because if the voltage is below 2.8v the battery became unsafe, good that you are teaching people how to overpass the safety feature
it may show you a good voltage, but i dont think it could work as a regular battery, it wont give you enough current, and will drop voltage so fast.
Ahmad Ebrahimi will it work as new battery cell if this process is done with dead cell ?
@@kuldeepsinhzala6471 no, it last only like 5 - 10% than the original power
Not true I revived a point & shoot camera battery that I had let get too low and it has worked fine for over a year now ' all depends .
When they show less than 2.5v or get warm when charging , i give them to the recycling center.
Thanks a lot. Funny cuz the charger and voltage scenario down to the charger indicator lights and color of cell...Got my dead cell up in under 30 seconds!
Great tips. The magnet trick to conveniently attach leads is also clever. I didn't have a charged lipo battery, but this also works if you have a variable power supply. I just set mine to 3.2V and connected it in parallel to my battery for 30 seconds, and the battery was ready to charge!
I like the magnet idea there. Thanks for the tip.
Nice idea with the magnet, will use from now on! Cheers, brow.
I've enjoyed your accent while watching your various battery videos.
I tried your method on NI-MH batteries and it worked. Thank you very much for sharing this!
An excellent job. You saved me 4 batteries of 6000 mAh. Thanks a lot.
they are not 6000 mah anymore. (they probably never were, companies lie a lot about 18650 capacity)
However the batteries “recovered” in this way will never hold a charge long under load. Over discharging an Li-Ion battery permanently damaging the cell.
Good point, glad someone pointed it out. Some further remarks:
1) It's not a good idea to use another cell to do this, as you'll be depleting it quite fast, and you can't control the (dis)charge rate. Best use a bench power supply, or an AC/DC adapter of the correct voltage, with a low current rate.
2) "It's already at 3V". No, the other battery has drained to 3V. Just because you touch the tips of the battery under charge doesn't change the fact that what you're measuring is the voltage of a parallel circuit. Hence, you measure the voltage of the other cell, not the one you're touching. Due to the high current at which it discharges into the other one, it experiences a voltage sag, which is why you're measuring 3V instead of 4V. If you want to know the voltage of the battery that's being salvaged, disconnect the other cell and measure in isolation.
That said, there's nothing wrong with the general principle. With the caveat, as you pointed out, that those revived cells will never be quite the same again.
@@EvenTheDogAgrees Not to mention the cells that have reversed polarity.
@@bingosunnoon9341 you don't get reverse polarity by connecting cells in parallel. Reverse polarity is what happens when unevenly charged cells are being discharged in series. The stronger cells will push current through the circuit, including the weakly charged cells, and force them to discharge so far that eventually the charge on those cells flips polarity.
@@EvenTheDogAgrees That's not true at all. The cell nearest the B- terminal always reverses first, regardless of connection scheme.
Using another cell to charge it will destroy them both. The battery providing the power will discharge at like 40 amps and will charge the other battery at like 40 amps. You are essentially short circuiting one and charging the other way too fast. Batteries have almost no internal resistance. So they can suck back a near unlimited amount of amperage. The amperage they are charged at and discharged at should always be controlled.
This is amazing, thanks for posting!
🤟 Worked great for restoring my HS510 drone battery! Was about to tear the battery apart but I just did the jumper wire trick for a few seconds from one of the other HS510 drone batteries and it came back to life and is now charging on the Holy Stone charger. Thx for the great vid!
Nice video. I also liked the way you "connect" the battery with magnets ;-)
Yes but, once charged how long do those dead cells last compared to a good battery?
The reason why charging at unlimited current is a bad idea is that when a lithium cell is discharged too low there is nothing formed on the plates, charging at a low current (sub 100mA) will reform the chemistry on the plates if you charge too fast it will cause uneven forming of the plates and WILL cause dendrites which are shorts inside the cell, that do not happen right away and if it is put in a pack it will short out and cause a major chain reaction
This is not charging at "unlimited current". It entirely depends on the cell you use to charge the dead cell. In this case the LG cell puts out 2C or 3 Amps max. And it's also and old cell so it would be even less than that. I have never seen any Li-ion charger that puts out less than 100mA. Let's say if you do have one, how long would it takes to charge a 3350mAh cell? Let me do the math: 3350/100=33.5 hours! Yeah, that's over 33 hours to charge a Li-ion cell which I have never seen. Most charger would only take less than 4 hours. Lots of charger would take less than an hour. Some even take half an hour. That means they charge the cell at over 3 Amps on a regular basis. I'm not saying that's good for the cell but unfortunately there are lots of chargers out there that can charge a Li-ion cell in less than an hour especially cordless power tool battery chargers. Take a good look at all cordless power tool chargers: Dewalt, Milwaukee, Ryobi, Kobalt, Bosch... all of them have fast chargers. In this method I'm using, I'm only charging it at 3 Amps for 30 seconds. That's even less than a typical charger that does it all day everyday. Sure dendrites are formed in Li-ion cells but that's a typical life cycle of a Li-ion battery. It's like human growing old, having white hairs and wrinkles, developing cancer. That's part of growing old. Not all dendrites are bad, however. Only ones that are big and hard enough to pierce through the cell layers and short out the circuits. Most dendrites are harmless and part of the life cycle of a typical Li-ion battery.
Yea but tell me the current that it charged at. Oh you don’t know for sure because you didn’t limit it. When reviving a dead cell you only charge at a low current until it is at a normal voltage again. Then you can charge it in your ultra fire linear parallel charger
SuperBrainAK
Yes, I know for sure what the charging current is. It's much less than 3 Amps. Here's the follow up video: ruclips.net/video/vFmbG8GpS4A/видео.html
The tool manufacturers want you to buy more batteries, so fast charging makes the customer happy and destroys batteries making the corporate jerks happy.... it's a win - "win".
One weird tip...I guess you're in the right place since youtube.com has no shortage of scams but the link you supplied is a classic marketing scam.
Thank you! I liked the tip you gave about magnet to secure the aligator. One question, how is it affected a dead battery on his performance? Once dead is like does not have the same capacity? Thank you
Awesome idea with magnet to connect wires....and great vid. thanks.
That was really cool!! I thought you would jump the dead battery with a live one with perhaps twice the voltage!! but you did it a lot safer!! and those magnets!!!
The magnet to hold the leads made the vid..thx..the battery revival was old knowledge
Thanks man worked great, I just held wires to the connectors
Thanks had a brand new item with inbuilt battery, accidentally left on and ran flat over a couple of weeks. Would not light up the LED panel or charge. Pulled the battery out, kick started as explained in this video, put the battery back in and it is now charging as normal. Don't know yet if I have done permanent damage, but looking good so far. Was a life saver because we could not get another 3.7V the same size as the one built into the item.
Just woke up my 25r's, we will see if they hold charge.
Thanks man👍
There was no way I was sticking something under positive to reset cid button 😢
did they hold charge?
@@anthonyhadsell2673 sure did bro, still going
Really? I find that very hard to believe. Not if the cell's CID has been tripped it won't. It physically cannot! The CID is a current interrupt device making a physical separation of the circuit like a fuse. This is just a "wake up" method for very low voltage cells. However even with all that said, this is a VERY BAD idea and stupid on oh so many levels. That 1.7m people watched this recommendation is the only positive about it, certainly there should be a bunch of warnings attached to the video. It's impossible to list all the reasons in a YT comment BUT just "off the bat," paralleling 2 cells of very diff voltage levels is dumb and dangerous due to possible excessive equalization current. Just from your example of a 25R cell, if that one was the charged cell, it could easily dump over 50a instantly (25r can pulse discharge more than that too,) to the low cell, with unpredictable results on both low cells and any thin AWG wires connecting them. Fire can erupt wyite quickly in that circumstance. Yes, crap low discharge rate laptop cells are less of a danger for this, but there are so many other factors. Aside from all that, the "woken" cell may suffer from dendritic growths and may self discharge to LV quite quickly, making the entire operation essentially irrelevant. Considering how cheap these cells are I can't believe people are wasting their time, and inviting a potentially dangerous situation in their homes, but they "your life, your house/mortgage," if people are renting though, I wouldn't let the landlord see the video or comment ;p
@@ABritInNY I didnt say CID was tripped at all. Just low voltage that my charger wouldnt charge. I used a full charged bat and jumped it in 20 second increments while holding in my hand to keep an eye on heat.
Anyway your question was really? My answer is yes, I dont talk shit.
As far as the rest of your comment, I only got to about the 3rd line before becoming to bored to continue🤷♂️, but I appreciate your effort, thanks. I have no doubt you are very smart😁
@@rustyh1686 Understood, but then I'm not sure why you'd say in your comment"...to reset the CID button." I mean why mention reset if not tripped? That was kinda the part I was commenting on.
Cool trick, man. Just a tip: if you put electricity thought a magnet, with time, this one will be demagnetized. And the magnets also add resistance to the circuit, so it's better if you don't use magnets while charging your batteries. Peace, bro. 👍
That's the point only 30secs?
Thanks man it works! I had a dead AA very new battery only used it 3 times. Wouldn't charge, when I measure no voltage. I actually used a 9v to give it a jump for only 5 seconds. Then measured 0.8v and now its charging.
Excellent, just the magnet idea alone was enough for a thumbs up.
I think the magnet s on the alligator clips was the coolest and most handy thing I've seen all day. Did you just glue small magnets to them or are they actually magnetic?
He put tiny magnets on battery
@@troublefollows9986 might have just put batteries on the magnets
I discharged my battery to far and the charger wouldn't charge it. I tried your suggestion and it worked. Thanks
Charger didnt charge it for good reason. Its safety function that is built in. When litium battery goes under its safe to charge voltage, it looses its capacity and creates internal resistance witch eventually cause short circuit witch causes it to heat up and catch fire, if not explode depending construction.
Sure you are able to revive battery like this, but its not safe to operate afterwards and its capacity is cut greatly. I have done this to my rc Lipo batterys for few times, but i know the risk involved and kept these batterys separated and monitored from the rest until it bloated too much for my comfort level, witch point i run it down to 0 volts, using light bulb as load, check there was no voltage in any of the cells, cut the connectors off to be used in other batterys (only cutting one lead at the time), electric taped the lead ends and recycled it according the laws around here.
Bro your a life saver Thank you very much!!
You, good sir, have just saved me the cost of a new battery. Thank you!
Matt Deluca what’s that 2$ wow now you can retire!
@@shawnt8891 more around $7-10 for a good 3000mAh 18650. I actually had 2 dead ones that I revived, so I saved double lol
Good ones (good name brand samsung, lg, enloop etc) can be upwards of 15-20 bucks a piece
Mine sparks when combined in parallel. Also no voltage increases immediately. Checked the dead battery resistance, it has few ohms. Is it end chapted?
Most likely yes
what you can also do is use a Turnigy or imax b6 charger to raise the voltage to get them to charge. all you have to do it swap it to NiMH mode and charge it for a couple seconds until the voltage on the 18560 is 2.25-3v and then you can swap it back to lithium mode and continue charging like normal. it will work for any lithium cells.
Don't work with a 406 DUO charger.
It worked, thank you!I have saved a dead Li-Ion battery.
Discovered this myself with tablet flat li ion batteries. Nice video.
This is what's called bump charging, i have done this before to my cell's and it does work as long as the cell has not reached it's end life cycle.
I always find myself coming back to your channel to see what your up to and it is always entertaining. I also get more ideas watching your videos.
I live in Texas so never thought temperatures below 40 deg f would effect me but recentlyI was visiting the cold northern states and experience temp well below the safe levels for the 18650s so I had to pay attention to the temp inside the RV. I was wondering if you have done any test on charging and discharging 18650's in cold temps? By the way my RV Powerwall build has worked out great... thanks for all your videos.
don't try to charge a cold battery, let it rise to normal room termperature first, some tool battery chargers have sensors that check for this before attempting to charge
Not that this guy shows ANY safe knowledge regarding lithium ion batteries. The guy you want for this info is called Mooch. Don't follow this guys advice at all if you value your health and property.
RV-PowerWall you're* up would *affect
I had purchased a new battery after realizing the aftermarket deck I put in my VW Wagon was draining it but was time anyways 2 replace. So it killed the new one. My 20+ year old charger had an issue with power cable eventually fraying so I picked up a new digital smart charger (EverStart Maxx 50A,15A,3A trickle). Hooked it up and pressed recalibrate and nothing. I was confused, passed, and gutted. But then I took a step back and thought to myself alright, so I got to work. I replaced the power cable in the old school direct current charger. Tested it and made sure there where no issues. Threw it on the dead battery for a small period of time and once I got it to a quarter to half way of it being charged I tried the digital and it started charging and doing its job. So yes this is a very, very helpful way to get more life out of batteries like these that are believed to be dead. I have a 10 year old 18650 battery from an old original vape pen which broke in my Tactical flashlight and still to this day I use it almost daily taking the dog out. Lasts as long as it did back then and same current too as every 6months I throw the 18650 that came with the flashlight in and double check so I know how it's doing and to re-topoff the stored one to keep it freshly charged while stored.
Good job. Great video. Love the magnet technique.
I came back here to hear you say cells again. If I could thumb it up again I would.
Cool trick with the magnets, I will definitely remember that!
Would be cool if you can check the capacity of a cell brought back to life like that and maybe try it with an old dead cell as well.
BTW, what accent is that? Sounds cool.
I have a couple friends who are Vietnamese and their accents remind me of his. I also like that accent!
@@axelcramer3964 I was definitely thinking Southeast Asia
He is from the Philippines bro
Three replies about the accent. Zero about battery capacity. I’m also interested to know what the stats are on one of these “resurrected” cell, especially when compared to a new or even “like new” cell!
I also like the accent. Very cool 😎
You wizard !!! Just what I was looking for. Thanks for sharing !!
This is very brilliant. Thank you
Have to wonder how long that cell is going to work after doing this. Something tells me you wouldn't get too many more uses out of it.
It wont work at all. When he put the voltmeter on it you could see the voltage diving. There is an internal short in the battery it will be down to zero volts maybe in an hour.
It was already dead, so whats your point. You get a couple extra charges for free.
@@dreadog6425 it really just depends on why the cell is so low. If it is at 0v its done, you can do this and charge it and it will be back to 0v faster than you can use it... maybe an hour later or a day later. If the battery has any sort of charge when you try to save it you are going to be able to use it a lot more times... although you need to find out how it got pulled down below the cutoff voltage. Often this happens in packs where another cell is 0v and has a short and drags others down. Find the 0v one and replace it... pack is fixed. Dinking around with the 0v is a waste of time. But for testing you can charge it, measure voltage,then let it sit for a day. Check the voltage again.
His method for charging isnt very smart... there could be a very good reason the battery is at 0v. Putting a good battery across the terminals of a bad one is dumb. If that battery has a short circuit... and his does because it gets hot... you are hoping the battery can safely dissipate all the energy you are putting into it. If you put a wire across the terminals of a good quality fully charged unprotected cell it would go very bad very quickly... like the wire glows instantly... it is absolutely nothing like an alkaline AA battery.
Interesting thing i saw on bigclivedotcom youtube, he did research on the overdischarge causing damage issue. Sounds like it might be not so bad. Its based on the very first li-ion batteries and they have come a long ways in manufacture since then.
@@dreadog6425 At the risk of the cell short circuiting causing a violent fire. Yeah go ahead, get those last few charges of of it............
@Chris Richards
Talk and more talk, $50 scam, worst rating on Amazon.com
You should really have some amount of resistance (like a 3V light bulb) in series between the two batteries to limit charge currently (even though it will take longer), as you likely over currenting the battery for a time with possible damage. Even more so if you try to charge a smaller capacity battery from a bigger charged cell, when it could potentially even cause a fire or battery rupture (in the smaller cell). I have an electronics engineering background and having seen lithium battery fires, I recommend treating lithium batteries with great care!
yes, these safeties must be told in such videos, ppl just look as this type of videos and jump into experiments without knowing harmful side of it. some times these batteries burst out like a bomb and cause serious injuries.
Why didn't it burn huh?
What amps and voltage is dangerous?
I LOVE YOUR ACCENT!! 👏🏻👏🏻👏🏻
I think he's Vietnamese, my maths teacher in highschool was, and he sounded EXACTLY like this XD
Why I never thought of using magnets? Good job!
No matter how you revive them they are good as dead, they won't hold charge for long
Strangely I have an electric bike that I have built a battery out of 18650 cells that originally tested "dead". I got them to take a charge using the parallel battery method.
This e-bike will run for about 4 hours continuously on a charge; using these reconditioned cells. It's been going like this for about 4 months now.
@@DBPR01 some cells have protection inside , an ic chip that will cut the power if the cell voltage is too low. It may show zero volts when actually is not. Whatever the case, just check temperature when charging and discharging, some cells can be hotter than others.
@@clixium Both of your lasts comments are useful, I believe some applications can perfectly be made with "dead" batteries with no risk at all, such as a stupid ring device or so.
Almost feel like I’m getting an order of gator nuggets in Pierre Part, Louisiana. It’s everyone else with an accent! 😄👍🏼
Wait, so, where IS he from?
Great Info - I never would have thought of the magnet trick - thanx
Much love! This totally worked for me. Was at 0.15V, placed in parallel for ~10 sec to 1.8V, which was enough for my charger. Good looking out!
@1:53 YOU DIDN'T DISconnect the parallel wires BEFORE testing the lame battery. So you were getting the sum of the whole circuit. Not the actual reading of the lame battery alone. Though this method does work, i would've liked to have seen the actual voltage of the lame battery solo at each test point.
I Like your video and I think it's safe..I like the fact that you answer to all comments with a positive response..I already made one explode and it's crazy dangerous not fun at all. I'll never never going to do that again..but I will dispose them the proper way.. ido you have a recommendation for that ?
I've done all sorts of crazy stuffs with Li-ion batteries and I've never seen any explode, not even once. What kind of battery did you explode and what did you do to make it explode?
It works with my old metal hydride makita batteries too, I use 2 x 9 volt batteries in series to raise the voltage to pacify the charger. 😊👍🏻
Thank you!!! This video helped me a lot 😊👍 subscribed!