Dewalt Lithium Ion Battery Won’t Charge? Try Resetting It With This Easy Fix.
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- Опубликовано: 11 авг 2021
- Dewalt battery not taking a charge or the charger not picking it up? Try this before scrapping it. There’s a good chance it just needs to be reset. This should work on all brands dewalt, makita, craftsman…
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#DIY #dewalt #powertools #fix #battery #chargeabattery #fixabattery 
Хобби
THIS is how you make a RUclips instructional video. Quick explanation, followed by easy to follow demonstration. No fluff, no rambling, no over explaining. Well done!
AND.....NO Music!!
@@chuckredd9131 Good point. He avoided overly dramatic or annoying music, too.
Agreed, well done, but watch it at 1.5 normal speed
Would have been better if he didn't start off with what's up guys
And not telling the viewers to like comment and subscribe. If I like the video, I'm going to like it. I definitely don't hit the like button when a content creator is telling me to like it. Even if I do like it, at that point I don't want to hit like anymore because I'm being told to do so.
My partner has a lot of tools, so when he needed a circular saw, I ordered this one for him as a Christmas gift. ruclips.net/user/postUgkxYDKeIjKLOfcwTgdin7TtCutsz4MbIc43 He is incredibly happy with the purchase. He stated that he likes that it is powerful, but still easy to use and cuts very well. He mentioned that it is important to know the right tools for the job at hand, and this compact saw has been exactly what he needed for a variety of projects at his rental properties and renovations. He also appreciates the battery packs, as stated, he owns a lot of DEWALT tools, so he is able to always keep batteries charged as needed.
Saved me a new battery. Straight to the point no stupid loud music. Again thanks
Just did a Google search to get here. My battery was good but been sat on the shelf for months. It wasn't showing any signs of life. Did this reset and it worked like a charm. Thanks man, saved me buying a new battery.
Nice!
@@MatthewPeechWoodworking can i connect 20v good battery to 18v bad battery and fix it?
What I like best about you is your willingness to share information, “trade secrets “ and shortcuts you have learned over time.
When I was an apprentice it was so frustrating that some old timers wouldn’t share their knowledge as they seen it as “ Job Security”!
Knowledge is useless if it isn’t shared, and I appreciate your willingness to do so. 👍🏼
@@repentandbelieveinJesusChrist3 I am a child of the Most High God, Saved by Faith through Grace, not by works so I cannot boast.
I still don't share secrets....................they will come with me when I die
Now I’m in my 50’s and I’m now one of those “old timers”, I’ve always shared all my secrets, it’s never harmed me. Apprentices always like working with me, I’m patent, calm and never tell them off ( unless they take the p1ss then they’re told no messing ) and will explain to them over and over.
People who are secure in their abilities are willing to show anybody because they are confident in their own abilities, and have a bring it on attitude to any competition and actually appreciate others who can or are skilled as much as they are. What's sad is those who try to mislead you or tell you wrong Information on purpose to try and cause you troubles because they are so insecure about their own abilities and are worried any new fish or anybody who knows anything might come in and take their jobs. Probably lied to get their position anyways. But the real good ones can be shown the essential basics and figure out the rest with relative ease especially if they pay attention to what an old schooler does. Most old school people are more than willing to show thirsty younger people who want to learn, only problem is most young people these days don't care enough to thirst and are lazy to boot, plus they are know it alls. The biggest blocker in learning know it alls.
@@mikeforner7797 well, that will be your legacy, a guy who didn't know shit.
While waiting online for a Dewalt agent to answer me, I found this video. I said "what do I have to lose". Well sure enough, after only a few seconds, I put the dead battery in the charger and it was immediately recognized. I hung up on the agent :) Thank you Matthew for making this awesome tip video!
Thank you for this Matthew! Just did this to a milwaukee 18v battery that had been sitting dead on my work bench for about 3 years now and would not charge. Now it's charging, thanks again.
Dude! You saved me. I've had this dead battery for a while, and didn't think it could be revived. This worked. Thanks.
Worked like a charm. Took a total of two minutes to get the battery ready to charge. Thanks saved me the expense of purchasing a new battrey.
Glad it helped
I use 8 to 12 batteries daily. Had 3 go out last week. Much appreciated.
@@MatthewPeechWoodworking i have one that will charge fully but only last about a minute. Any fix for that?
@@user-cs3zs6jn1d That usually happens to a new battery. Keep on totally discharging, then totally changing, over and over again for about 6x times (cycles) more.
Only for the cost of almost burning down your house! So cheap!
Was totally skeptical and did not think it would be as simple as this to fix! Just brought 2 batteries back to life! Thanks
No worries! Yea I've done this several times.
Repent to Jesus Christ
“As a father has compassion on his children, so the Lord has compassion on those who fear him;”
Psalms 103:13 NIV
Do they fully charge and do they hold charge like a new battery. Or so they drain faster? Cheers
@@dranderson6071 yes they will charge but capacity and discharge power are effected this is why lion lipo batteries blow up and catch on fire pulling to many amps from a damaged battery will make it blow up
@@repentandbelieveinJesusChrist3 dude! Why the hell do you people have to do this all the time? If you found something that works for you, great! Congratulations! But please keep your damn preaching to yourself. That is so inappropriate.
I had a dead Dewalt battery, tried this and it worked like a charm, now I will have 2 good batteries again.Thank you
Top video. I haven't tried this technique yet but will in the morning and let you know the results. What impressed me the most was your concise, straight to the point delivery. No long intro and many minutes of my existence lost to unnecessary waffling. 😊
Great video, Left my battery on my impact wrench almost two years in garage from cold to hot days and my charger wouldnt even detect a defective battery nothing. I tried this and it worked like a charm thank you!!
Warning. Only do this in an emergency. If you manage to charge this battery, do not keep this battery anywhere it can cause a major fire.
Why ? When these batteries are discharged below 3v per cell, dendrites (small spiky structures) can grow and possibly pierce the separator between the anode and cathode of the battery, causing a short circuit, and thus a fire.
Most consumer electronics will regard 3.3v as fullt discharged, and the battery protection circuit will then turn the equipment off to prevent over discharging.
If a cell is found to be 2.3v or lower for anything by the a very brief time, then it is effectively dead, dendrites will have certainly grown, and even if you manage to charge it, the dendrites are still there, and you now have a ticking time bomb. Do not reuse such a cell.
Once that separator is pierced you may have a fire, the intensity of that fire will depend on how much charge is stored in that cell.
If your battery pack has been dischared for some time, open it up, and measure the voltages directly accros the individual cells. If this is less than 3v, do not attempt to charge. Even if there is not a fire, you will notice that after charging, that cell will self discharge within an hr or so. This is due to a partial internal short circuit caused by dendrites. More energy put in to such a cell increases the risk of fire.
You have been warned.
This man is awesome! He is teaching the world how to win with batteries! Everything is going battery powered these days. He could be onto something big!
Huuuuge!!!
Holy crap! It worked! Thank you for your straightforward and helpful video and for not unnecessarily making it 20 minutes long.
I had seen before how this was supposed to work but I wanted the details. I picked your video because it was the shortest. You explained everything that a person needs to know in a short amount of time. I just went out to the garage and did this to my battery, it is now charging. Thanks so much!
Fantastic video. Clear concise instructions. Will definitely file this away for a time when I need it. Thank you very much!
Worked like a charm !!! Thanks for the tip, saved me from dealing with DeWalt customer service.
Thank you so much! You just saved me $50 - $60. It was so easy! Battery is charging now. I appreciate you so much! Thanks again!
Thanks for hot tip!! I had a dead battery, googled the issue, found your video, followed your instructions--and voila!! Much appreciated!
Fantastic. So simple and works exactly as he shows it. Thanks a bunch.
Dude, you just saved me hundreds of dollars, awesome video, straight to the point! Good job my man!
I had the exact same problem with the exact same hardware. I had been putting off looking into it for weeks, and when I saw your video, I fixed it in seconds! You saved me a lot of money, thank you!
Matt, I was just about to go get a new battery and this popped up on my Facebook feed. I have a Dewalt heated jacket I got new for Christmas last year and put it in the closet with the battery still hooked up. Needless to say the NEW battery was dead and wouldn't take a charge. I tried your hack and it worked like a charm. Appreciate you making this video. Thank you!
No worries at all. I figured I wasnt the only one that needed to know this trick.
I gave this method a shot, and dude I wish I saw this before. I Tried it, and it's so easy peasy and worked like....AMAZING! Thank you, love all your planter videos, I just gotta do it. Andrew 😀
Well done, Matthew. I've had a 12v DeWalt battery completely dead for a year, unable to take charge. I was ready to dispose of but kept changing my mind until I watched your video, and what a surprise, it’s been working! Thanks man, for being there for us. You've got my "like"
It’s tough to believe what you are commenting because you didn’t comment that you fixed the battery with this process. Let me guess you’re just still so happy that there is internet and wait what’s this? A video about batchry?!…. Amazing!…
Warning. Only do this in an emergency. If you manage to charge this battery, do not keep this battery anywhere it can cause a major fire.
Why ? When these batteries are discharged below 3v per cell, dendrites (small spiky structures) can grow and possibly pierce the separator between the anode and cathode of the battery, causing a short circuit, and thus a fire.
Most consumer electronics will regard 3.3v as fullt discharged, and the battery protection circuit will then turn the equipment off to prevent over discharging.
If a cell is found to be 2.3v or lower for anything by the a very brief time, then it is effectively dead, dendrites will have certainly grown, and even if you manage to charge it, the dendrites are still there, and you now have a ticking time bomb. Do not reuse such a cell.
Once that separator is pierced you may have a fire, the intensity of that fire will depend on how much charge is stored in that cell.
If your battery pack has been dischared for some time, open it up, and measure the voltages directly accros the individual cells. If this is less than 3v, do not attempt to charge. Even if there is not a fire, you will notice that after charging, that cell will self discharge within an hr or so. This is due to a partial internal short circuit caused by dendrites. More energy put in to such a cell increases the risk of fire.
You have been warned.
@@gregjones3660 are you okay?
@@kenlang1070 im gay
@@gregjones3660 me too
Thank you so much for this! It worked as quickly and as well as you said it would. People like you give me faith in humanity!!!
This saved me hundreds of dollars. I had a few that would not do anything. This trick works and they are now fully charged. Thanks you so much sir for sharing this.
Hell yeah my man! You just saved me hundreds of bucks!!! Thank you so much for taking the time to make this video
You just saved me over $200 for my photo studio light battery. I thought one of batteries was dead (no response)…
Little wire connection with good battery just like you showed and battery alive and charging again. Amazing. Thank you, you r genius!
Warning. Only do this in an emergency. If you manage to charge this battery, do not keep this battery anywhere it can cause a major fire.
Why ? When these batteries are discharged below 3v per cell, dendrites (small spiky structures) can grow and possibly pierce the separator between the anode and cathode of the battery, causing a short circuit, and thus a fire.
Most consumer electronics will regard 3.3v as fullt discharged, and the battery protection circuit will then turn the equipment off to prevent over discharging.
If a cell is found to be 2.3v or lower for anything by the a very brief time, then it is effectively dead, dendrites will have certainly grown, and even if you manage to charge it, the dendrites are still there, and you now have a ticking time bomb. Do not reuse such a cell.
Once that separator is pierced you may have a fire, the intensity of that fire will depend on how much charge is stored in that cell.
If your battery pack has been dischared for some time, open it up, and measure the voltages directly accros the individual cells. If this is less than 3v, do not attempt to charge. Even if there is not a fire, you will notice that after charging, that cell will self discharge within an hr or so. This is due to a partial internal short circuit caused by dendrites. More energy put in to such a cell increases the risk of fire.
You have been warned.
Seen it done but had no faith. Worked like a charm. Short and sweet video also, straight to the point. Much thanks to you good sir!!
Gotta give credit where it's due! Your informational video just saved three of my 20v Lithium Ion batteries! They're not cheap, and as you discussed, I drained the batteries too much where it would not allow a charge. Thanks for your video, and for saving me a considerable amount of money!
When disconnecting batteries, never pull both leads out of one battery first. No matter how careful you think you are, sooner or later you'll let those two wires touch and short out the battery that the wires are still connected to.
You always disconnect one lead first from each of the two batteries and then disconnect the second lead.
Excellent advice, Rex!👍
What is life worth without a little adventure/risk??
Same advice when jumping a car. Wife and her friend got to meet some hunky firefighters, though.
@@bruceregittko7068 good for them
💥 learnt that when a kid jumping the car .👍
You are a lifesaver!! I cannot thank you enough; thought I was going to need to buy another battery and, as a female who hates to have someone else do things for me, you gave me a solution that works!! THANK YOU!!
Dude you are a lifesaver.
You are a godsend my friend. My battery was dead exactly how you said....left in a radio all night. Quick 5 second boost and it was charging again. Many many thanks! These damn things are expensive!
Thank you!!! Was about to buy another but decided to look for a fix. Worked perfectly!
Dude you just might have saved me the time and headache of taking apart my dewalt battery that just got completely discharged!! Thanks !!👍
UPDATE: Just jumped my dead battery like you showed and it’s now taking a charge !! Don’t know why I didn’t think about doing this in the first place??? It’s just like jumping your car battery and then keeping the engine running so the alternator charges it up again!
THANK YOU!!!!!
It's still dead.
Warning. Only do this in an emergency. If you manage to charge this battery, do not keep this battery anywhere it can cause a major fire.
Why ? When these batteries are discharged below 3v per cell, dendrites (small spiky structures) can grow and possibly pierce the separator between the anode and cathode of the battery, causing a short circuit, and thus a fire.
Most consumer electronics will regard 3.3v as fullt discharged, and the battery protection circuit will then turn the equipment off to prevent over discharging.
If a cell is found to be 2.3v or lower for anything by the a very brief time, then it is effectively dead, dendrites will have certainly grown, and even if you manage to charge it, the dendrites are still there, and you now have a ticking time bomb. Do not reuse such a cell.
Once that separator is pierced you may have a fire, the intensity of that fire will depend on how much charge is stored in that cell.
If your battery pack has been dischared for some time, open it up, and measure the voltages directly accros the individual cells. If this is less than 3v, do not attempt to charge. Even if there is not a fire, you will notice that after charging, that cell will self discharge within an hr or so. This is due to a partial internal short circuit caused by dendrites. More energy put in to such a cell increases the risk of fire.
You have been warned.
Battery is still going strong but appreciate the warning about the dendrites. But with what Dewalt charge$ for the$e batterie$ I will take the risk
Glad I found this info. I was running my leaf blower until it stopped every time. I clean up my whole street almost daily. My next move is getting a gas-powered blower.
I was today years old. A battery that was only a year old, which I thought was dead, is now charging again. Thank you!
Worked like a charm, thank you! I have a new DeWalt 12v battery that has never charged, and this fixed it in 60 seconds.
Warning. Only do this in an emergency. If you manage to charge this battery, do not keep this battery anywhere it can cause a major fire.
Why ? When these batteries are discharged below 3v per cell, dendrites (small spiky structures) can grow and possibly pierce the separator between the anode and cathode of the battery, causing a short circuit, and thus a fire.
Most consumer electronics will regard 3.3v as fullt discharged, and the battery protection circuit will then turn the equipment off to prevent over discharging.
If a cell is found to be 2.3v or lower for anything by the a very brief time, then it is effectively dead, dendrites will have certainly grown, and even if you manage to charge it, the dendrites are still there, and you now have a ticking time bomb. Do not reuse such a cell.
Once that separator is pierced you may have a fire, the intensity of that fire will depend on how much charge is stored in that cell.
If your battery pack has been dischared for some time, open it up, and measure the voltages directly accros the individual cells. If this is less than 3v, do not attempt to charge. Even if there is not a fire, you will notice that after charging, that cell will self discharge within an hr or so. This is due to a partial internal short circuit caused by dendrites. More energy put in to such a cell increases the risk of fire.
If the cells have briefly (a few hrs only) dropped below 3.3v, but, not below 2.3v per cell, then ok, have a crack at charging, but, there is increased risk of fire. 3v can be revived ok providing the cell has not been sitting @ 3v for period of time. More time below 3v = greater risk the anode to cathode separator will be pierced from growing dendrites, causing a short circuit, and hence a potential fire hazard.
You have been warned.
Thanks so much for this, just saved two of my batteries thanks to this video!
Thank you. I've seen this done before but never had to do it. This morning one of my batteries was completely dead and wouldn't take a charge. This worked like a charm.
I had done the exact thing with a 2ah battery. Run it down in a stereo. It’s been on the side for over a year. It was a nearly new battery before it went into the radio. I’ve just followed your instructions and wow. You saved me buying a replacement. Thank you. I have sent some money as a thanks for saving me money! .
Thank you. Actual useful content. I will always remember this.
This is so simple yet counterintuitive, would've never thought of it. Saved lots of batteries today. Thank you!
It really is counterintuitive. It would do the opposite to balancing the cells . It would unbalance them more.
@@chrishart8548 I think you are missing the point. A few seconds of charge merely brings up the voltage temporarily so that the charger will recognize it as a battery to be charged, there is no actual charging happening. It is a bit like the foamy milk on a cappuccino, looks big but all air.
I've just jump-started a battery that has been dead for 2 years and wouldn't charge. I nearly threw it away. You've just saved me a lot of money on a replacement. Thanks 👍👍
Brother you just saved me $300 bucks, you sir have a nice day 👍👍👣👣👣
It totally worked for me. Just a few seconds and then the unrecognized battery was able to charge normally again. Nice! 👍
Thank you! What a great straightforward video. This worked like a charm and saved me $90 on a new battery!
Thank You Matthew! I had the identical battery, which was almost new. Your idea worked like a charm. I connected mine for 15 seconds, which is likely 10 seconds too long. After removing wires one light was lit on the charge indicator. Your presentation is too the point with no fluff.
I had seen other people do this but didn't really trust them, but after watching several of your builds and getting a feel for you I think I can trust your instructions and I'm going to give this a try
I had x4 batteries that weren’t charging, I find leaving them in the radio kills them. But after following this video all 4 are now charging and working well! You have literally saved me about £200! Thank you so much.
Is the radio the charger?
Same question - "the radio"?
@@MMAFightMagazine my dewalt dab radio completely discharges the batteries if you leave them in, poor design by dewalt
excellent tutorial, jumped our dead depleted dewalt 20V battery right up. hardest part was finding some spare wire to use😆🔨⚙️
Thank you!!! I had a "bad" battery sitting on a shelf for years because I never got around to recycling it. Easy fix and saved me some $$$. Thanks!
THANKS A LOT!
Battery began charging!
Thanked God for providence to find this helpful info!
Awesome, thanks. I haven't had this happen to me yet but I have a pile of Dewalt stuff so I'm sure it'll come in handy eventually
Thanks Matthew! , you saved me from buying a new battery. Great video 👍🏽
Boom goes the dynamite! 100% works 🙏🏾
Thank you Matthew it really worked as you showed .the battery was on the shelf for seven years.GOD BLESS YOU
Well done Matt and thank you! I had a new Dewalt 4Amp 20V, same as you had in the video tip and it was totally dead and would not charge, had been on a saw all Winter and it was 100% depleted. Your tip allowed me to basically get the Dewalt charger to detect a slight current in the battery again and it charged perfectly.
Was not 100% depleted ... under 3.3 volts is irrecoverably dead. It's no magic, it's chemistry.
@@countmorbid3187 Thank you Mr. Dewalt!
Thanks, Mattew this video got me going again in 5 minutes and most of that time was finding wire and stripping the ends.
Awesome!
thank you for the easy to understand, plain talk, common sense video! If you want to make a youtube video, watch this guy. He's no bull, gets the job done, and is a pleasure to listen to and watch!
You just saved me over $200 for replacement batteries … thank you!
Thank you for this! I had 2 dead DeWalt batteries and so thought my charger was dead.
I used a charged Bosch to get them started. Worked exactly as you explained and saved me from buying a replacement!
Thanks for the excellent tip, worked like a charm for me!!
Glad it helped!
Thank you sir you have just saved me a bundle of money , as some others had batteries sat dead for a few years , got board tonight and thought you tube ,,, amazed to see the dead battery finally charging , next is 54v will try that ,,, you are totally right , funny thing is the worst thing for a dewalt battery is the piggin dewalt radio ,,, thumbs up mate
Dude!!!!! It worked!!! You're the best!! I can't wait to show this off to my man friends!
Awesome!
I stored a 18volt dewalt impact for multiple years. I thought I had to replace the batteries because obviously they were dead. So I thought, I followed these instructions using a 20 volt battery and had great results. Thank you for saving me the cost or buying new batteries 👍
You used a 20v to revive an 18v battery? All my 18v work for a minute then die.
@@JC-qm4ot this self discharge is due to the internal short created by the dendrites that have grown. You were lucky to not have a fire.
Warning. Only do this in an emergency. If you manage to charge this battery, do not keep this battery anywhere it can cause a major fire.
Why ? When these batteries are discharged below 3v per cell, dendrites (small spiky structures) can grow and possibly pierce the separator between the anode and cathode of the battery, causing a short circuit, and thus a fire.
Most consumer electronics will regard 3.3v as fullt discharged, and the battery protection circuit will then turn the equipment off to prevent over discharging.
If a cell is found to be 2.3v or lower for anything by the a very brief time, then it is effectively dead, dendrites will have certainly grown, and even if you manage to charge it, the dendrites are still there, and you now have a ticking time bomb. Do not reuse such a cell.
Once that separator is pierced you may have a fire, the intensity of that fire will depend on how much charge is stored in that cell.
If your battery pack has been dischared for some time, open it up, and measure the voltages directly accros the individual cells. If this is less than 3v, do not attempt to charge. Even if there is not a fire, you will notice that after charging, that cell will self discharge within an hr or so. This is due to a partial internal short circuit caused by dendrites. More energy put in to such a cell increases the risk of fire.
You have been warned.
THANK YOU! Saved me 200 bucks on a new battery. If you are ever in Fargo ND I’ll buy you a beer
Excellent walk thru simple and consistent ! Will keep that in mind ! Thanks for your video
Well Mathew, I can't tell you how helpful this has been. I have already taken 4 different batteries back to Dewalt to have them replaced just for this very reason. Many thanks for some extremely helpful info sir and you now have a new subscriber!
How do you take them back to Dewalt
@@billyd.6411 Out here where I live there is a Dewalt store that does repairs. That's where I take my Dewalt tools to be repaired and such. And as long as the batteries are still under the 3 year warranty then they will exchange them with no questions asked.
@@brianfalls5038 ok thanks will give it a try do I need a receipt or can they tell from serial numbers
@@billyd.6411 If you look on your battery then it should have a date code on it. It should be on the top left hand side of the battery. You shouldn't need a receipt for the battery.
Thank you, Matthew, you're a Peech! EVERYONE knows this fix, THE WRONG WAY!!! Most have been taught to do that reset with a number of electric sources other than the right one you can easily get from a like battery! Too easy! And then with your explanation we now have a full understanding as to WHY this is happening! Thank you again for taking your time to make this video!
Reasontruths: that's ok but what about those who do not have a spare battery laying around. Can another type of battery be used to put some juice in it? I guess you have to match the voltage.
@@horacesawyer2487 Good question, try it and see. What can you lose? A battery you can't use? I have multi voltage transformers, I'll find the right match no matter what the voltage. I have a whole slew of AA and AAA rechargeable batteries that are completely dead, and won't charge, this method works to bring them back! But I just use another AA or AAA to jump start the dead ones because I have so many good ones also. Do you have any small rechargeable's to try it? It doesn't seem that a lower voltage could hurt the higher voltage battery. Try at your own risk, but crazy me would go for it!
@@reasoningtruth Warning. Only do this in an emergency. If you manage to charge this battery, do not keep this battery anywhere it can cause a major fire.
Why ? When these batteries are discharged below 3v per cell, dendrites (small spiky structures) can grow and possibly pierce the separator between the anode and cathode of the battery, causing a short circuit, and thus a fire.
Most consumer electronics will regard 3.3v as fullt discharged, and the battery protection circuit will then turn the equipment off to prevent over discharging.
If a cell is found to be 2.3v or lower for anything by the a very brief time, then it is effectively dead, dendrites will have certainly grown, and even if you manage to charge it, the dendrites are still there, and you now have a ticking time bomb. Do not reuse such a cell.
Once that separator is pierced you may have a fire, the intensity of that fire will depend on how much charge is stored in that cell.
If your battery pack has been dischared for some time, open it up, and measure the voltages directly accros the individual cells. If this is less than 3v, do not attempt to charge. Even if there is not a fire, you will notice that after charging, that cell will self discharge within an hr or so. This is due to a partial internal short circuit caused by dendrites. More energy put in to such a cell increases the risk of fire.
You have been warned.
an this be done with a 10 amp battery charger?
Ok anyone that tells me RUclips is stupid I'm going to just say yep. But this is the best video I've ever watched I just had that problem today with a fairly new battery I did exactly what this man instructed I just watched it 10 min ago and my dead battery is already charging 👍
Brilliant!! Thank you! Tried it and worked straight away.
Outstanding!!! With the outrageous cost of these batteries, one can’t afford to discard one that may have life left in it.
This worked ! I was skeptical, but I was so happy ! So simple. Thanks !
No worries! Big money saving tip! Pass it along!
I always heard you had to take them apart, disassemble the small "cells" inside, charge individually, then reassemble. This is sooooo helpful! Thank you!
Thanks brother!!! I did it on my 2 dead battery’s and WORKED!!! Perfect 👍🏽👍🏽🙏🏽
What I have found in the lithium batteries I've played with, have a computer chip inside to control charge rate, heating, etc. When the battery is completely dead, there is no power to run the chip. I have directly charged cells with a 9 volt battery, current limited, to get enough charge to run the chip, then the battery will charge normally.
So what is shown here is correct, with a slightly different background.
The only risk is a totally discharged battery changes chemically and can become internally shorted. Be very careful when charging and using it afterwards as it could easily catch fire.
I guess all these people dont know how dangerous a li-ion battery can become once its dropped below 3v, there is a reason the charger will not charge it
@@HardcoreRC fire smire whats alittle fire....lol
@@memyselfandi3925 LOL, yep lipos fires are nothing to worry about 😂😂
Yep, Stranger Danger. One you see one light off you would never do this in your home.
I am shocked that I had to scroll so far in the comments to find a warning about the fire hazard in doing this.
Thanks! About three years ago I ended up with two Black & Decker hedge trimmers and never got around to sending one back. I was going to sell it, but never got around to that either. So it sat in its box until this year, when somehow the charger for the original one got misplaced. The "extra" battery was completely dead and wouldn't take a charge. Following you instructions fixed it immediately. Just the time it took to cut a couple pieces of wire and strip them on the ends. I'll remember this. Again, thanks.
Wow, thanks! I had 2 dead batteries that I must have just run completely dry. This worked like a charm. What an easy fix! I can't wait to pass this on!
My only suggestion would be to make up your wires with spade terminal ends, just to avoid the risk of loose strands of wire breaking off inside the battery housing and causing problems down the road.
Otherwise, good video, thanks. 👍
Well done Matthew!…I just encountered the very same situation…the battery was not old and lightly used. Your “fix” worked perfectly!
Battery been on side in garage for 2 years. Fixed in 2 minutes. Great tip, thank you
my dead battery is taking a charge as we speak. Great tip! I wonder if it works on other makes.
Awesome! Im not sure.
Yes this does work, my 20v battery pack read 2.0v, i bumped it with another 20v pack for a 2 sec and it gave it a surface charge of 12v decreasing to 7v which is enough for the charger to recognize the battery. This can probably be done using a 9v battery as well if you only have one tool battery since your only giving it a small surface charge
Warning. Only do this in an emergency. If you manage to charge this battery, do not keep this battery anywhere it can cause a major fire.
Why ? When these batteries are discharged below 3v per cell, dendrites (small spiky structures) can grow and possibly pierce the separator between the anode and cathode of the battery, causing a short circuit, and thus a fire.
Most consumer electronics will regard 3.3v as fullt discharged, and the battery protection circuit will then turn the equipment off to prevent over discharging.
If a cell is found to be 2.3v or lower for anything by the a very brief time, then it is effectively dead, dendrites will have certainly grown, and even if you manage to charge it, the dendrites are still there, and you now have a ticking time bomb. Do not reuse such a cell.
Once that separator is pierced you may have a fire, the intensity of that fire will depend on how much charge is stored in that cell.
If your battery pack has been dischared for some time, open it up, and measure the voltages directly accros the individual cells. If this is less than 3v, do not attempt to charge. Even if there is not a fire, you will notice that after charging, that cell will self discharge within an hr or so. This is due to a partial internal short circuit caused by dendrites. More energy put in to such a cell increases the risk of fire.
If the cells have briefly (a few hrs only) dropped below 3.3v, but, not below 2.3v per cell, then ok, have a crack at charging, but, there is increased risk of fire. 3v can be revived ok providing the cell has not been sitting @ 3v for period of time. More time below 3v = greater risk the anode to cathode separator will be pierced from growing dendrites, causing a short circuit, and hence a potential fire hazard.
You have been warned.
@@nordic5490 true this trick only worked temporary and the pack didn't hold a full charge, after separating the individual batteries 1 cell was bad and couldn't be charged, also realized this method can over charge cells. The remaining cells tested fine with low resistance and near rated capacity
Hot Damn!! Your process worked as advertised! That in itself is refreshing in the world of RUclips, but you just saved me from having to buy a new battery. Thank you, thank you!
Thank you my friend - I just used your method to bring back to life my battery - a different brand !
It’s Alive !!!!
under no circumstances do this without testing cell voltage first (open the battery up and check the voltage acreoss cells), YES it can work if the cell voltage is still above 1.9v , if it has dropped below 1.9v and you do this you run a high risk of overheating the cells as the cells can experience dentritic growth between cell layers and cause short circuits
Do you have to disassemble the case or can you test at the B+ & B- contacts?
@@kevosims2012 I take the case off so I can check the cells individually (or in parallel pairs) if you measure the total battery voltage it might show it down by a couple of volts which could be interpreted as either a partly discharged battery or a battery with one cell near death, I don't like the ambiguity
@@TheMingilator Copy that. Thanks for the reply, very helpful.
It's not going to overheat and explode in 3 seconds.
Having said that: do this outdoors
@SaltyBrainsif it's been entirely depleted then it is no longer a good cell, it is best practice to dispose of them
I'm going around and finding people who think their batteries are junk and asking if I can have them for five bucks and when they ask why I'm gonna lie and say something that is a lie... Thank you for this video
Thank you. Terrific video - clear, concise. Worked like a charm for a friend's DeWalt battery he was having this experience with.
Excellent, my Bosch Battery had the same problem and it magically worked, Thank you from England
Warning! There is a fire hazard if you do this!
There is a reason why the charger will refuse to recharge a dead lithium ion battery. It may get internal chemical damage leading to a short and thermal runaway. In an emergency it can be done (I used a resistor to somewhat make it safer) but the battery shall regarded as unsafe for ever after that. I must be discard in some safe way.
Yes, 100% correct.
Warning. Only do this in an emergency. If you manage to charge this battery, do not keep this battery anywhere it can cause a major fire.
Why ? When these batteries are discharged below 3v per cell, dendrites (small spiky structures) can grow and possibly pierce the separator between the anode and cathode of the battery, causing a short circuit, and thus a fire.
Most consumer electronics will regard 3.3v as fullt discharged, and the battery protection circuit will then turn the equipment off to prevent over discharging.
If a cell is found to be 2.3v or lower for anything by the a very brief time, then it is effectively dead, dendrites will have certainly grown, and even if you manage to charge it, the dendrites are still there, and you now have a ticking time bomb. Do not reuse such a cell.
Once that separator is pierced you may have a fire, the intensity of that fire will depend on how much charge is stored in that cell.
If your battery pack has been dischared for some time, open it up, and measure the voltages directly accros the individual cells. If this is less than 3v, do not attempt to charge. Even if there is not a fire, you will notice that after charging, that cell will self discharge within an hr or so. This is due to a partial internal short circuit caused by dendrites. More energy put in to such a cell increases the risk of fire.
You have been warned.
Just did this with my 40v trimmer, couldn't believe it worked. Thank you for sharing!
It worked…plain & simple. You are the Man & I thank you!
Worked perfectly, thanks man. Also thanks for making a short and simple fix video.
awesome WORKED LIKE A CHAMP!! One of the best videos ever! saved me a lot of $$$$
Just tried this and its charged my battery, thank you simple and effective video. Your a legend