Hi. I know nothing about electricity but I followed a variation of your instructions and brought a powertool back to life. Just wanted to say thanks for the education.
Making use of the ruclips.net/user/postUgkxcJ22tnHH9l1vjdIdEIG27iOG55P7LXI8 reconditioning plan, I just saved 2 auto batteries from being completely junked. The guides were very simple to follow. I wish I would have found this years ago! You may use the guide to recondition any battery type
This actually works. One of my fatmax 18v batteries was dead. I used the other battery and a piece of twin core flex wire. I only joined them for about 10 seconds and immediately put the dead battery in the charger and it started charging straight away. Thanks.
As they say over here in the (UK), You learn new thing's every other day,so thanks my friend you've also saved me buying a new battery, I thought if connecting two together like you've shown would cause one to explode, I was obviously wrong.
Thank you for taking the time to post this video. It saved me from having to take back my open box Kobalt 40V mower that I just bought. I suspect the dead "unchargable" battery had been the reason that it was returned. Your process worked like a charm, and the battery charged completely overnight when it had previously been flashing red on more than one charger. I used another 40V Kobalt battery to charge it for about 10 minutes.
@@MichaelNazareth you don’t have to actually connect them, like with alligator clamps or anything. Just get a couple pieces of insulated copper wire, touch the negative (-) on bad battery to the neg (-) of a 2nd battery, and the positive (+) on bad battery to the pos (+) on the 2nd battery, and you should see a small spark if it’s hooked up correctly. Hold them there for a few minutes then pull it back out and see if the voltage goes up. If so, try it on the charger. If it charges, you’re good, to go, if not repeat the process until it registers on the charger and starts charging again. Just make sure you charge it fully before using it again.
I have a Dewalt 12v lithium ion impact driver set with 2 batteries. About 3 months in, one battery would not charge, the yellow light was blinking, which said something about the temperature, even though it was at room temperature. I did this trick on it just now and it has charged now and is working perfectly fine. I knew the battery was still good, cuz it's fairly new, barely used, I think the battery level light was being pushed while it was in the case and drained the battery all the way down. Thanks a whole bunch, man!!
I have two lithium batteries & one of them is dead & needs to revive them. I can use the other working battery to revive them. Can you tell me which cables to get from Amazon so i can use this technique to revive my dead battery. Thanks in advance.
I have a DeWalt power screw driver and wrench set. Came with two batteries. One charged and the other one wouldn't. I charged the good battery, wired it to the one that wouldn't charge just like this video shows. Lo and behold they both charge now. Thanks for the great video.....saved me at least 35 bucks.
Excellent video - helped me revive my Porter Cable 20v lithium battery! I was about to buy another one when I spotted this video. I used ordinary metal brackets thin enough to squeeze thru the terminals instead of metal clips and this method worked fine. Bravo!
Man, I hope this works! I lent my favorite drill to a coworker and I don't know WHAT he did to it but it is straight up dead! Trying this tomorrow but even if it doesn't Thank You, you are what RUclips is all about.
Your videos are very good. Your English sounds good. Your speech is at the optimal rate of speed. Thank you for sharing your knowledge. I encourage you to answer inquiries of viewers with regard to your videos. Thanks again .
Man, thanks so much. I had a 12V Li-ion battery for my Dremel 8260 that I left in for many months. Tried to turn it on and nothing. I tried your trick with a Milwaukee battery. 10 min charge and I was back in business. I plugged it back into the charger and it started charging. Will see if the Dremel starts working.
I found this and used the same process to charge up a Greenworks 80V battery - Greenworks Customer Service said the battery was useless- saved me $240 thanks
Great video. I did the same thing to a Chraftsman 19.2 lit-ion. The tricky part was figuring out where to connect the leads. Turns out on a Chraftsman the positive side is the end where the plastic cover is curved. The negative is exactly opposite or the end with the short straight plastic. Hooked it up, 10 minutes later it was showing 9v. Plugged it in the charger and away it went!!!
My MAN!!! I sort of owe you $80 for 2 new batts, they work like new now. Many thanks vuaeco. Another method I saw was heating the batt to 100º for 1 hour, then charge.
I have a 18v Dewalt drill,and did not use it for two plus years. both batteries would not charge, (one of the battery was brand new.) Both were dead accoding to the Dewalt charger. Use you method. Now both work, Thank you very much.
Battery-to-Battery method worked perfectly to kickstart my 12V Bosch Li-ion batt. It was somehow sitting at 1.2V. I connected this dead batt, as per vid, to a companion 12V batt. Let it sit for 20min. Then disconn batts. Dead batt had been restored up to about 9V at which point charger worked to bring it up to full charge in about 35min. Seems to work great again in my drill motor. Thanks!!
I used a couple of box cutter blades inserted in the batteries connected to my 2000 amp 6 metre long car jumper leads to charge a 58V AEG chainsaw battery that the charger would not recognise. I bought a new AEG battery and used that to charge the one that only had 1V in it, and after 10 minutes of charging, I can now charge the 'dud' battery. (I performed the operation outside where nothing would catch on fire!) You saved me AUS $200. Thanks!
Thank you! I thought I had made one of my batteries into junk by discharging it too far. This works and my battery is charging again. I really appreciate your video 👍🏻
bought a clearance battery drill. I thought it was a good price until I found the charger flashing RED! battery was toast. This procedure fixed it . Thanks
I've brought dead lipo batteries for rc boats before but I didn't know I could do it with lipo power tool batteries. I didn't even think to do it with my dead lipo power tool batteries. Now that I know I have revived a couple of my dead batteries and they are functioning just fine. BTW I revived my batteries two weeks ago before I posted this comment. Many thanks.
Nice! I had a Black & Decker 20V battery very similar to the style shown in the video. It was registering less than 1V. I connected it to just a small 9V household battery for just a couple of minutes, and it brought it up to 5 or 6V. Put it back on the charger to see if it would take, and sure enough...it started charging again! Going to let it go, but hopefully it will be good as new! *fingers crossed*
You legend - thank you so much. You saved me 100 euro on a battery replacement for the Einhell RT-MG 10.1. Einhell stipulate that the battery should be charged before putting it in storage. I didn't and had an unchargeable battery when II subsequently went to use it. Your post got me out of trouble. Worked exactly as you said. Thank you again.
Just rescued my 40v 4Ah battery using this exact method Thank you for sharing! Just a note - please use shielded cables when doing this, I only found bare steel wire and I accidentally crossed them and sparks and a nearly melted terminal was a result!
Thanks to your video I revived a SWIT S-8056N Li-Ion Broadcast Video Camera Battery. After leaving it for a month in the camera last Friday I took it out of the camera to charge it, but "smart" charger wasn't responding to the battery. I thought that I scrapped a $300 battery. After I watched your video, using the same principle, I taped wires with electric tape to the leads of another NP-1 style battery (positive to positive and negative to negative) for 5 minutes, then dropped the depleted battery into the charger. Charger became very hot at first, but came back to life. Close call...
Cheers for this upload!! Hugely appreciated. I just tried this earlier this evening on the battery for a laptop I just bought from eBay, and was extremely disappointed and annoyed to find that the battery appeared to be knackered - so much for the "perfect working order" description. Looks like it had just "gone to sleep" and wouldn't therefore wouldn't charge. I carefully broke the casing open and did exactly the same thing as you did using a laptop battery from another older laptop I no longer need. Both were 11.1V with the usual 18650 cells arranged in series. The 'sleeping' battery was 3 cells in series and was reading only 6.5V - I suspect it had been laying 'flat' and unused for well over a year judging by when this laptop last had a Windows Update run on it. A few seconds of doing this and the voltage was up to 10.2V. Put it back together, plugged it back into the laptop, and off it went :-). Currently at 86% charged so will be interested to see how long it lasts once fully charged :-)
Brilliant. Thought my batteries were dead, used this very easy shock method and both batteries were revived and fully charged. Saved me a lot of money. Thank you.
I am doing an angle grinder 18 volt battery and was pondering how to find a similar source of voltage to boost the battery back enough for the charger to work - Simple but brilliant fix, Thanks.
Thank you very much for this very useful video. In my case it was 18V procore battery from Bosch. One battery voltage was close to 3V. I've used a similar battery to revive it. And it take just a minute to reach 18.2V !! JUST BE CAREFUL TO KEEP A CLOSE WATCH DURING THE PROCESS , USE HEAVY GAUGE AND CAREFULY CONTROL THE TEMPERATURE OF THE WIRES
I am loving this. I can't wait to try it out. Whether it works or not on the 'dead' lithium battery I have, I thank you. It's sure to come in handy down the road. Thanks much.
I tried this on My Ryobi 18v lithium battery and it worked fantastic. In my case, however, I had to take the battery apart and attach jumpers from the charged battery to the battery leads inside the battery. At first, I tried the leads outside but some circuit seemed to be isolating me from bring up the voltage on the dead one. With the jumpers on the internal terminals, I was able to bring up the voltage to where the charger would recognise it as valid. It's charging right now. Very happy. These batteries are not cheap to replace. Much thanks.
alawishis congrats you have a ticking time bomb, I would wish people would use their damn brain. Research why you should never use cells that have be drained below 1.5-2.0v. These batteries are extremely sensitive and are highly chance of damage from shorts and failures within the cell. Catching fire and exploding. THESE manufacturers have these safeties in place to protect YOU from burning your damn house down.
zack9912000 It's either that or ol Zack 911 has a booming used battery business going and this method is putting a dampner on his supply and demand. I've seen him with the same comments, on many other RUclips videos, involving this subject. Just saying.
Big thanks. I figured this was possible but Google searches will tell you otherwise. Ive lost 3 batteries lately. I realized tonight it was by running them on older tools without the cutoff. So I'm gonna try to save them tomorrow with the only battery I have left!
Thanks. This worked on my 18v lithium worx battery. one was showing 14.2 volts and would not take a charge. The other was 18.6. I thought time for a new drill till I seen this video. I rigged them together as instructed for 20 mins and it went up to 18.15. Stuck it on the charger and it took a full charge. even the other one then also took longer charge too. Well done no need for a New drill yet or buying spares from eBay. Thanks for this very useful tutorial.
I tried this as well - it works great. My 24V li-on Ryobi was dead for 2+ years - super dead. This is just like jump-starting a car battery! I had no options - they didn't make this model of battery anymore, and I couldn't buy it anywhere - I was looking at throwing out the entire tool and spending lots of $$ to buy a new one. I connected the negative-negative and positive-positive to my 20V li-on Black & Decker, and I had to wait for 10 hrs for my Ryobi to get a 20V charge. (Note that different brands will have the positive-negative leads in different positions). If you do negative to positive, you will get the arcing - so there is no way you can make a mistake on this! Then I put my Ryobi on its charger, and it started charging without any problems. So for $15 for the alligator clips and AWG 14 gauge wire, I rescued my battery instead of throwing out the entire tool! Thanks, this is a great DIY hack.
Thanks, this is the same situation I faced and your solution work as described. My pack voltage was down to around 3 to 4 volts. Others comments noted but this does get your pack back into use
this worked on my 18v lithium dewalt dcd760 drill. used a battery from a 20v lith dewalt... fashioned some leads with clips,. battery was dead dead dead for 3 yrs. I gave it 10 min with this method, put it on charger and got hot/cold flashing led. before only got fast flashes which = bad battery. 1 hr later fully charged. SWEET!
Perfect! Now I have a free spare. Originally, I had a brand new Echo CBP-58V20 that was blinking red (“conditioning”) for over 24 hours in the charging station. (Bought the blower on year-end clearance and did not take it out of the box until this fall.) Called warranty service and they sent out a replacement battery. I was told to recycle the defective original battery. After the new battery was fully charged, I decided to give this a try. The original tested at 3.3 volts (from 58v!!). After 5 minutes, disconnected the wires and placed the defective battery into the charging station. Viola!! it’s now charging! Thanks!!!
Great video. Really helpful. I have been using these batteries to power my garage sound system which has a 20 watt stereo amplifier with bluetooth that I play spotify through. Ran two of my drill batteries right down an they wont charge in the charger. Now I can fix them.
Dude you rock. I had a brand new Dewalt battery that would not charge and sure enough 4 volts. Did your trick with the other battery and it charges now. Thanks.
Thank you very much for this video! I fixed my drone battery with this technique. I did have to take the case apart to bypass the power switch on it, after a quick jump start it instantly had 10 volts on the battery that I had condemned as NFG. thank you very much! I've learned a valuable lesson about lithium ion batteries!
Thanks, this worked great for me. I already bought a replacement battery, but now I have a backup as well! I used some wiring I had laying around, the solid bare wire slid right in. Thanks again!
Only use a lithium charger with lithium batteries. Piggy backing in parallel batteries works well for smart chargers because you use the known good battery to fool the undercharged battery. This can be dangerous so don’t ever leave them unsupervised. Been doing this for years with RC batteries and I use a 4010 duo charger which will charger any type of battery you want, including car batteries. It’s also capable of putting batteries into storage mode when you’re not using them keeping the life going for years when properly maintained.
I had two 20 volt li ion batteries from dewalt that died. Apparently if you don't use them for 6 mos they completely lose their charge and die, meaning that cannot be charged. I called dewalt and they happily replaced the batteries but I wasn't about to just throw these unused batteries out. I tried to resuscitate these batteries using this trick and lo and behold, SUCCESS!! Instead of sticking metal pieces into the batteries I used some 10 amp fuses I had laying around. It was scary at first because of the small spark and the potential for explosion. All in all, great hack!!
I had a Nikon Camera battery that was not taking charge.. Hooked it up with a freshly charged one for only 5 seconds and voila...the dead battery i charging.. Thanks alot for this...
hey ,if anyone else wants to discover how to recondition old batteries at home try Vaxicorn Battery Extender Guide (just google it ) ? Ive heard some incredible things about it and my cousin got amazing results with it.
There are many components to doing a pro job. One resource I found which successfully combines these is the Magic Mender Wizard (google it if you're interested) without a doubt the most useful course that I've heard of. look at this great resource.
Thanks verry much ! i had a 18V metabo Li ion i had use on a grinder , the grinder took the battery to empty why i don't know, i could not charge the battery again , i used your methode . hooked a same battery fully loaded to the bad for 5min. and it works perfect now .
Whew - I did not notice the batteries were turned opposite to each other and I thought he was connecting positive to negative even though he stated otherwise. I had to keep looking at the batteries until I noticed they were turned opposite. I'm going to try this. I hope it works for me.
Worked for 2 out of 3 of my batteries. The one that it didn't work for I got second hand and didn't work when I got it, I persume 1 dead cell as is still has some voltage. The two that it did work for were left on tool that drained them, one was at 6v (dewalt 18v)
Thank you so much, you saved me $100 :-D :-D :-D and that is just the cost of the battery, I was thinking about buying a new drill too, but not anymore.. I love that drill, but got second thoughts when the battery died on me after only two months.. and that was last summer :-D Thank you...
I just ran into this issue with my Hitachi, any tips on there being 2 + terminals on my battery, one says + the other C+, I was guessing that C+ meant charging positive terminal but I wasn't sure. I can always verify what terminals my charger actually connects to and go from there. Thanks for the advice, i hope it works for me too
Somebody needs to make a device that will do all of this in one easy step. Just hook up the dead cell, set the voltage, and turn it on. You could make a mint selling that kind of thing.
Well what do you know? I just fixed a Porter Cable 18v Lithium battery that had never worked since new. My drill came with 2 batteries so I was stuck with just one. I'm glad I never threw it away before I saw this video! Now I have 2 good batteries! Thanks.
I have 2 makita 21v almost brand new and one wont accept charge. As soon as i get some jumper wires ill try the 30 second rule and see if it works. Thanks for this
? Can this method be used for a large lithium powerpack (300V); which has a similar problem - won't accept a charge - IF I had a second lithium powerpack (that works and is charged)? dangers to the new battery pack? thank you
Does the jump start battery have to be the same voltage as the dead battery? Because my dead battery is 10.8V and my jump start battery is 18v/54v dewalt flexvolt battery. Anyway it didn't charge it. Actually it did by bringing it to a single light indicator (has 3 leds in total) and it wasn't enough for the charger to start charging the dead battery.
Thanks you so much for this video, the information was really helpful, purchased a drill that wouldnt charge, but after following your FIX i know how a functional battery/drill.
I am wondering if I could use say a 12V dc Adapter to 'jumpstart'a LiON battery? Problem is I only have one battery and several cordless drills, but they all suck batterywise. I guess you could use this to revive NiCD and NimH as well?
I use a DC power supply just to get the battery to start taking a charge. It's safe because I limit the current to 20 milliamps, which will not heat up the battery. Once the battery starts to take a charge, I use the regular charger to finish charging the battery.
Hi. I know nothing about electricity but I followed a variation of your instructions and brought a powertool back to life. Just wanted to say thanks for the education.
Making use of the ruclips.net/user/postUgkxcJ22tnHH9l1vjdIdEIG27iOG55P7LXI8 reconditioning plan, I just saved 2 auto batteries from being completely junked. The guides were very simple to follow. I wish I would have found this years ago! You may use the guide to recondition any battery type
This actually works. One of my fatmax 18v batteries was dead. I used the other battery and a piece of twin core flex wire. I only joined them for about 10 seconds and immediately put the dead battery in the charger and it started charging straight away. Thanks.
As they say over here in the (UK),
You learn new thing's every other day,so thanks my friend you've also saved me buying a new battery, I thought if connecting two together like you've shown would cause one to explode,
I was obviously wrong.
Thank you for taking the time to post this video. It saved me from having to take back my open box Kobalt 40V mower that I just bought. I suspect the dead "unchargable" battery had been the reason that it was returned. Your process worked like a charm, and the battery charged completely overnight when it had previously been flashing red on more than one charger. I used another 40V Kobalt battery to charge it for about 10 minutes.
How did you connect the terminals ?
@@MichaelNazareth It's been a while, but I believe it was very similar to how he did it in the video.
@@MichaelNazareth you don’t have to actually connect them, like with alligator clamps or anything. Just get a couple pieces of insulated copper wire, touch the negative (-) on bad battery to the neg (-) of a 2nd battery, and the positive (+) on bad battery to the pos (+) on the 2nd battery, and you should see a small spark if it’s hooked up correctly. Hold them there for a few minutes then pull it back out and see if the voltage goes up. If so, try it on the charger. If it charges, you’re good, to go, if not repeat the process until it registers on the charger and starts charging again. Just make sure you charge it fully before using it again.
I have a Dewalt 12v lithium ion impact driver set with 2 batteries. About 3 months in, one battery would not charge, the yellow light was blinking, which said something about the temperature, even though it was at room temperature. I did this trick on it just now and it has charged now and is working perfectly fine. I knew the battery was still good, cuz it's fairly new, barely used, I think the battery level light was being pushed while it was in the case and drained the battery all the way down. Thanks a whole bunch, man!!
I have two lithium batteries & one of them is dead & needs to revive them. I can use the other working battery to revive them. Can you tell me which cables to get from Amazon so i can use this technique to revive my dead battery. Thanks in advance.
I have a DeWalt power screw driver and wrench set. Came with two batteries. One charged and the other one wouldn't. I charged the good battery, wired it to the one that wouldn't charge just like this video shows. Lo and behold they both charge now. Thanks for the great video.....saved me at least 35 bucks.
Thank you for sharing your video I used your procedure on an ECO 58 volt battery and it worked my battery is new and never charged it befor. :]
you sir just saved me 50 plus dollars. I just revived 2 Porter Cable 18 volt batteries using your method. thank you thank you
Excellent video - helped me revive my Porter Cable 20v lithium battery! I was about to buy another one when I spotted this video. I used ordinary metal brackets thin enough to squeeze thru the terminals instead of metal clips and this method worked fine. Bravo!
Where did you get metal brackets ?
Man, I hope this works! I lent my favorite drill to a coworker and I don't know WHAT he did to it but it is straight up dead! Trying this tomorrow but even if it doesn't Thank You, you are what RUclips is all about.
IF you use the battery until it completely dead the charger cannot catch up. It needs the 20v boost to get started. Its a wake up call.
Worked for my 20v Milwaukee M18 battery went from 2.8 v to 18.3 after 15 minutes. Charged like a champ. cheers!
Did your battery hold charge and amperage well compared to other good batteries?
@@jerydob6499 nope!
Your videos are very good. Your English sounds good. Your speech is at the optimal rate of speed. Thank you for sharing your knowledge. I encourage you to answer inquiries of viewers with regard to your videos. Thanks again .
Man, thanks so much. I had a 12V Li-ion battery for my Dremel 8260 that I left in for many months. Tried to turn it on and nothing. I tried your trick with a Milwaukee battery. 10 min charge and I was back in business. I plugged it back into the charger and it started charging. Will see if the Dremel starts working.
I found this and used the same process to charge up a Greenworks 80V battery - Greenworks Customer Service said the battery was useless- saved me $240 thanks
Great video. I did the same thing to a Chraftsman 19.2 lit-ion. The tricky part was figuring out where to connect the leads. Turns out on a Chraftsman the positive side is the end where the plastic cover is curved. The negative is exactly opposite or the end with the short straight plastic. Hooked it up, 10 minutes later it was showing 9v. Plugged it in the charger and away it went!!!
My MAN!!! I sort of owe you $80 for 2 new batts, they work like new now. Many thanks vuaeco. Another method I saw was heating the batt to 100º for 1 hour, then charge.
Great! When do I get the check? :D
Do not ever, and I mean Never, heat a battery. It could be the last thing you do.
I have a 18v Dewalt drill,and did not use it for two plus years. both batteries would not charge, (one of the battery was brand new.) Both were dead accoding to the Dewalt charger. Use you method. Now both work, Thank you very much.
Glad it helps!
Battery-to-Battery method worked perfectly to kickstart my 12V Bosch Li-ion batt. It was somehow sitting at 1.2V. I connected this dead batt, as per vid, to a companion 12V batt. Let it sit for 20min. Then disconn batts. Dead batt had been restored up to about 9V at which point charger worked to bring it up to full charge in about 35min. Seems to work great again in my drill motor. Thanks!!
I used a couple of box cutter blades inserted in the batteries connected to my 2000 amp 6 metre long car jumper leads to charge a 58V AEG chainsaw battery that the charger would not recognise. I bought a new AEG battery and used that to charge the one that only had 1V in it, and after 10 minutes of charging, I can now charge the 'dud' battery. (I performed the operation outside where nothing would catch on fire!) You saved me AUS $200. Thanks!
Thank you! I thought I had made one of my batteries into junk by discharging it too far. This works and my battery is charging again. I really appreciate your video 👍🏻
bought a clearance battery drill. I thought it was a good price until I found the charger flashing RED!
battery was toast. This procedure fixed it . Thanks
I've brought dead lipo batteries for rc boats before but I didn't know I could do it with lipo power tool batteries. I didn't even think to do it with my dead lipo power tool batteries. Now that I know I have revived a couple of my dead batteries and they are functioning just fine. BTW I revived my batteries two weeks ago before I posted this comment. Many thanks.
Nice! I had a Black & Decker 20V battery very similar to the style shown in the video. It was registering less than 1V. I connected it to just a small 9V household battery for just a couple of minutes, and it brought it up to 5 or 6V. Put it back on the charger to see if it would take, and sure enough...it started charging again! Going to let it go, but hopefully it will be good as new! *fingers crossed*
You legend - thank you so much. You saved me 100 euro on a battery replacement for the Einhell RT-MG 10.1. Einhell stipulate that the battery should be charged before putting it in storage. I didn't and had an unchargeable battery when II subsequently went to use it. Your post got me out of trouble. Worked exactly as you said. Thank you again.
Michael Reyes
I have spent months studying battery repairing and found a fantastic website at Rapid renew roadmap (google it if you are interested)
Start your very own battery business and make huge money here: HootBattery.xyz
If you want to bring those old batteries back to life go to this link now HootBattery.club
Just rescued my 40v 4Ah battery using this exact method Thank you for sharing! Just a note - please use shielded cables when doing this, I only found bare steel wire and I accidentally crossed them and sparks and a nearly melted terminal was a result!
What metal clips did you use that slides into the battery terminal to attach the cables ?
@@MichaelNazareth go to a DIY store and get get some flat plate metal to fit between the terminals. You’ll find something in the screw section
P
I
@@MichaelNazareth.
Thanks to your video I revived a SWIT S-8056N Li-Ion Broadcast Video Camera Battery. After leaving it for a month in the camera last Friday I took it out of the camera to charge it, but "smart" charger wasn't responding to the battery. I thought that I scrapped a $300 battery. After I watched your video, using the same principle, I taped wires with electric tape to the leads of another NP-1 style battery (positive to positive and negative to negative) for 5 minutes, then dropped the depleted battery into the charger. Charger became very hot at first, but came back to life. Close call...
WOW...you kick ass. you have just saved me from buying new batteries for all my power tools. Thank you so much.
Cheers for this upload!! Hugely appreciated. I just tried this earlier this evening on the battery for a laptop I just bought from eBay, and was extremely disappointed and annoyed to find that the battery appeared to be knackered - so much for the "perfect working order" description. Looks like it had just "gone to sleep" and wouldn't therefore wouldn't charge. I carefully broke the casing open and did exactly the same thing as you did using a laptop battery from another older laptop I no longer need. Both were 11.1V with the usual 18650 cells arranged in series. The 'sleeping' battery was 3 cells in series and was reading only 6.5V - I suspect it had been laying 'flat' and unused for well over a year judging by when this laptop last had a Windows Update run on it. A few seconds of doing this and the voltage was up to 10.2V. Put it back together, plugged it back into the laptop, and off it went :-). Currently at 86% charged so will be interested to see how long it lasts once fully charged :-)
Brilliant. Thought my batteries were dead, used this very easy shock method and both batteries were revived and fully charged. Saved me a lot of money. Thank you.
They just dont hold their current anymore. Thought of that?
I am doing an angle grinder 18 volt battery and was pondering how to find a similar source of voltage to boost the battery back enough for the charger to work - Simple but brilliant fix, Thanks.
Thank you very much for this very useful video. In my case it was 18V procore battery from Bosch. One battery voltage was close to 3V. I've used a similar battery to revive it. And it take just a minute to reach 18.2V !! JUST BE CAREFUL TO KEEP A CLOSE WATCH DURING THE PROCESS , USE HEAVY GAUGE AND CAREFULY CONTROL THE TEMPERATURE OF THE WIRES
I am loving this. I can't wait to try it out.
Whether it works or not on the 'dead' lithium battery I have, I thank you. It's sure to come in handy down the road. Thanks much.
I tried this on My Ryobi 18v lithium battery and it worked fantastic. In my case, however, I had to take the battery apart and attach jumpers from the charged battery to the battery leads inside the battery. At first, I tried the leads outside but some circuit seemed to be isolating me from bring up the voltage on the dead one. With the jumpers on the internal terminals, I was able to bring up the voltage to where the charger would recognise it as valid. It's charging right now. Very happy. These batteries are not cheap to replace.
Much thanks.
Find out how to easily recondition old batteries back to 100% of their working condition: hootbattery.blogspot.com
alawishis congrats you have a ticking time bomb, I would wish people would use their damn brain. Research why you should never use cells that have be drained below 1.5-2.0v. These batteries are extremely sensitive and are highly chance of damage from shorts and failures within the cell. Catching fire and exploding. THESE manufacturers have these safeties in place to protect YOU from burning your damn house down.
zack9912000
It's either that or ol Zack 911 has a booming used battery business going and this method is putting a dampner on his supply and demand. I've seen him with the same comments, on many other RUclips videos, involving this subject.
Just saying.
Big thanks. I figured this was possible but Google searches will tell you otherwise. Ive lost 3 batteries lately. I realized tonight it was by running them on older tools without the cutoff. So I'm gonna try to save them tomorrow with the only battery I have left!
Thanks. This worked on my 18v lithium worx battery. one was showing 14.2 volts and would not take a charge. The other was 18.6. I thought time for a new drill till I seen this video. I rigged them together as instructed for 20 mins and it went up to 18.15. Stuck it on the charger and it took a full charge. even the other one then also took longer charge too. Well done no need for a New drill yet or buying spares from eBay. Thanks for this very useful tutorial.
I tried this as well - it works great. My 24V li-on Ryobi was dead for 2+ years - super dead. This is just like jump-starting a car battery! I had no options - they didn't make this model of battery anymore, and I couldn't buy it anywhere - I was looking at throwing out the entire tool and spending lots of $$ to buy a new one. I connected the negative-negative and positive-positive to my 20V li-on Black & Decker, and I had to wait for 10 hrs for my Ryobi to get a 20V charge. (Note that different brands will have the positive-negative leads in different positions). If you do negative to positive, you will get the arcing - so there is no way you can make a mistake on this! Then I put my Ryobi on its charger, and it started charging without any problems. So for $15 for the alligator clips and AWG 14 gauge wire, I rescued my battery instead of throwing out the entire tool! Thanks, this is a great DIY hack.
Thanks, this is the same situation I faced and your solution work as described. My pack voltage was down to around 3 to 4 volts. Others comments noted but this does get your pack back into use
just tried it,it works for my stanley fatmax!!many thanks mate!saved me money for replacement!!❤❤❤❤❤❤❤
just tried your fix and it worked GREAT! Got my 58v Echo battery now accepting a charge,
Thanks for the video this is the exact problem I have. someone else left my tool on. Can't wait to fix it thanks again!
this worked on my 18v lithium dewalt dcd760 drill. used a battery from a 20v lith dewalt... fashioned some leads with clips,. battery was dead dead dead for 3 yrs. I gave it 10 min with this method, put it on charger and got hot/cold flashing led. before only got fast flashes which = bad battery. 1 hr later fully charged. SWEET!
Perfect! Now I have a free spare. Originally, I had a brand new Echo CBP-58V20 that was blinking red (“conditioning”) for over 24 hours in the charging station. (Bought the blower on year-end clearance and did not take it out of the box until this fall.) Called warranty service and they sent out a replacement battery. I was told to recycle the defective original battery. After the new battery was fully charged, I decided to give this a try. The original tested at 3.3 volts (from 58v!!). After 5 minutes, disconnected the wires and placed the defective battery into the charging station. Viola!! it’s now charging! Thanks!!!
Great video. Really helpful. I have been using these batteries to power my garage sound system which has a 20 watt stereo amplifier with bluetooth that I play spotify through. Ran two of my drill batteries right down an they wont charge in the charger. Now I can fix them.
Dude you rock. I had a brand new Dewalt battery that would not charge and sure enough 4 volts. Did your trick with the other battery and it charges now. Thanks.
Great, I will try and fix my mums hoover battery, I have already ordered a new one, now she will have a spare, Thanks for sharing..
Thank you very much for this video! I fixed my drone battery with this technique. I did have to take the case apart to bypass the power switch on it, after a quick jump start it instantly had 10 volts on the battery that I had condemned as NFG. thank you very much! I've learned a valuable lesson about lithium ion batteries!
Thank you for sharing this information. I was able to recover a Bosch 12 volt battery.
Thanks, this worked great for me. I already bought a replacement battery, but now I have a backup as well! I used some wiring I had laying around, the solid bare wire slid right in. Thanks again!
Yes!!!
My 2 flat heat screwdriver jumpers were kinda sketchy but my battery is finally charging...
Thanks.
Thank you sir, you are a life saver. Jumped my 80v Kobalt max battery from a spare one and now charging again! Great help.
I was having this very problem. Your instructions were right on. Thank you for knowledge
This is a very helpful video, and saved me from an expensive repair---THANK YOU, BROTHER!!! Much appreciated, keep doin what ya do. =)
Interesting how the +/- is reversed on the two batteries. You had me going there for a minute!!!!!
Only use a lithium charger with lithium batteries. Piggy backing in parallel batteries works well for smart chargers because you use the known good battery to fool the undercharged battery. This can be dangerous so don’t ever leave them unsupervised. Been doing this for years with RC batteries and I use a 4010 duo charger which will charger any type of battery you want, including car batteries. It’s also capable of putting batteries into storage mode when you’re not using them keeping the life going for years when properly maintained.
Do you think using a 12v 1AMP wall adapter will do the trick for my 12v battery that is currently sitting at 3v and not able to charge?
Excellent tip! I was able to get three Dewalt batteries back to life!
I had two 20 volt li ion batteries from dewalt that died. Apparently if you don't use them for 6 mos they completely lose their charge and die, meaning that cannot be charged. I called dewalt and they happily replaced the batteries but I wasn't about to just throw these unused batteries out. I tried to resuscitate these batteries using this trick and lo and behold, SUCCESS!! Instead of sticking metal pieces into the batteries I used some 10 amp fuses I had laying around. It was scary at first because of the small spark and the potential for explosion. All in all, great hack!!
I had a Nikon Camera battery that was not taking charge.. Hooked it up with a freshly charged one for only 5 seconds and voila...the dead battery i charging.. Thanks alot for this...
+Bryggern
That's a very good way to apply this to other kinds li-ion batteries. Great work!
hey ,if anyone else wants to discover how to recondition old batteries at home try Vaxicorn Battery Extender Guide (just google it ) ? Ive heard some incredible things about it and my cousin got amazing results with it.
There are many components to doing a pro job. One resource I found which successfully combines these is the Magic Mender Wizard (google it if you're interested) without a doubt the most useful course that I've heard of. look at this great resource.
I have spent months studying battery repairing and found a fantastic resource at Magic Mender Wizard (google it if you are interested)
Amazing, saved my dewalt 4ah battery from the bin and a good few quid out of my pocket, cheers mate! :)
Thank you for the great tip!
Thanks verry much ! i had a 18V metabo Li ion i had use on a grinder , the grinder took the battery to empty why i don't know, i could not charge the battery again , i used your methode . hooked a same battery fully loaded to the bad for 5min. and it works perfect now .
Whew - I did not notice the batteries were turned opposite to each other and I thought he was connecting positive to negative even though he stated otherwise. I had to keep looking at the batteries until I noticed they were turned opposite. I'm going to try this. I hope it works for me.
Worked for 2 out of 3 of my batteries. The one that it didn't work for I got second hand and didn't work when I got it, I persume 1 dead cell as is still has some voltage.
The two that it did work for were left on tool that drained them, one was at 6v (dewalt 18v)
You just save me $260.00. Recovered 2 Festool batteries that were dead!!
Thank you so much, you saved me $100 :-D :-D :-D and that is just the cost of the battery, I was thinking about buying a new drill too, but not anymore.. I love that drill, but got second thoughts when the battery died on me after only two months.. and that was last summer :-D Thank you...
impressive from 6 volt to nineteen poncho volts in a few minutes, thank you very much! :)
even if not completely restoring the health of the battery, it's a great technique to get the charger to start charging it properly again.
Thank you! Worked with my Dewalt Battery... Saved me a lot into buying new batteties...
I just ran into this issue with my Hitachi, any tips on there being 2 + terminals on my battery, one says + the other C+, I was guessing that C+ meant charging positive terminal but I wasn't sure. I can always verify what terminals my charger actually connects to and go from there. Thanks for the advice, i hope it works for me too
Thank you. My stanley fatmax battery came back to life..
Your instructions was somewhat not making sense... but after putting one and one together i have managed to re-enerergise the battery ... thank you
Thanks for this! I had to get another battery to do it, but now I don't have to throw out a barely-used battery that I was careless with! ;)
Top man you just saved me 50 pounds and an 80 km drive to the tool shop.
I have a Vanon 18V 4.0AH replacement battery for a Ryobi drill. It won't charge. But it has 20V when I measure at the circuit board.
Somebody needs to make a device that will do all of this in one easy step. Just hook up the dead cell, set the voltage, and turn it on. You could make a mint selling that kind of thing.
I really don’t know why it doesn’t exist.
@@calorion
Some lucky guy out there will get rich creating it
If only we could be bothered
Will get sued by battery companies fore sure!
@@JR-zw2vb huh? On what grounds?
when you check the voltage, you should disconnect the alligator clips or the measurement will be exactly the same on both the batteries
he mentioned that it would be the same
Love it, saved me from sending back a dead battery, Really helpful thanks :)
I made a different approach in reviving my lithium batteries, i make sure all cells are balanced and working well.
that's what I do and I bet he does it like this as well now
Brilliant matter
Well what do you know? I just fixed a Porter Cable 18v Lithium battery that had never worked since new. My drill came with 2 batteries so I was stuck with just one. I'm glad I never threw it away before I saw this video! Now I have 2 good batteries! Thanks.
Excellent. I have two Li Ion batteries in series for 7.2 volts. I need to do the same. Can i use a 9 volt or what would you recommend?
I have 2 makita 21v almost brand new and one wont accept charge. As soon as i get some jumper wires ill try the 30 second rule and see if it works.
Thanks for this
? Can this method be used for a large lithium powerpack (300V); which has a similar problem - won't accept a charge - IF I had a second lithium powerpack (that works and is charged)? dangers to the new battery pack? thank you
Does the jump start battery have to be the same voltage as the dead battery? Because my dead battery is 10.8V and my jump start battery is 18v/54v dewalt flexvolt battery. Anyway it didn't charge it. Actually it did by bringing it to a single light indicator (has 3 leds in total) and it wasn't enough for the charger to start charging the dead battery.
2 lithium porter cable batteries here, about 5/10 minutes as this man shows and they now take a charge and are stronger than the 1 that was working.
Those little gator clips can be bought at autozone with wires connected for 2/3$.
Batteries so smart that they're stupid. Great video!
worked for me and i am useless at anything like this, great post thanks
Looking forward to trying this on 2 batteries that suddenly won’t charge. Hopefully it will work. Thanks !
Thanks you so much for this video, the information was really helpful, purchased a drill that wouldnt charge, but after following your FIX i know how a functional battery/drill.
I am wondering if I could use say a 12V dc Adapter to 'jumpstart'a LiON battery? Problem is I only have one battery and several cordless drills, but they all suck batterywise. I guess you could use this to revive NiCD and NimH as well?
Fantastic. Revived my ozito battery. Great job. 👍👍
I have a dead m18 battery.
I plan to use a 6v/12v car charger to kickstand it with.
Will it be safe to use the 6v setting on an 18v pack ?
Thank you, you got right to it and I learned what I will do.
I used speaker cable on 10 v hitachi battery, worked after a minute!
I use a DC power supply just to get the battery to start taking a charge. It's safe because I limit the current to 20 milliamps, which will not heat up the battery. Once the battery starts to take a charge, I use the regular charger to finish charging the battery.
where is your multimeter set to? It doesnt look like your on V for volts, am I wrong? What is the proper setting for measuring the voltage?
This is great! Where can I get the clips you inserted into the slots?
Could we use the car charger to charge the li-ion battery?
I would only use a battery tender not a full on charger
You are... THE MAN!!! Thank you soooo much I’m going to do mine now 😎😎👌🏻
This video is still very helpful!!!!!!!!!!!!!!!!! It saved me $200 usd