Thank you so much for the tutorial. I saw some other video and used a simple steel wire and it just burned out !! I had totally missed out on the Amp and Wattage understanding. It took a a $1 for a feet of 14 gauge wire and 30 seconds to charge my dead battery. You saved me exactly 99$

61 year old professional tech here, you just saved my old battery packs, many thanks. Always learning!

56 years old and still learning smething new everyday and this was by far one of the best lessons yet

I cut both ends off some jumper cables and it worked perfectly thank you so much. I bought a tool set and I thought the batteries were bad. And now they're charging dude you are so awesome

I searched different videos but yours was the one that I felt I could follow best. It worked for me, saved me from buying a new battery and not sending it to the dump or to hopefully get recycled. Great video and great instructions, to follow at your own risk, love it!! Thanks!!!

If you notice once you hook up to test the battery the second time (after the jump) its steadily dropping in voltage...... The battery has a bad cell in it. Ive jumped several different types and size batteries in the last few years, and over time, I've discovered that no matter the type or size, if it has a bad cell, (or cells) it will continue to drain. Thus that battery will continue to drain over time faster than a battery that doesn't have a bad cell. There are ways to replace individual cells but that is not as easy for just anyone to do. Excellent vid though, and hope that info helps.

Outstanding!! So much easier than other videos, I saved well over $100 using this video to save 5 dead, unchargable batteries!! Thank u sir!!!!

Worked for me! Left the battery uncharged in the basement for 5 months, couldn't charge it anymore. Connected a spare battery to it for less than 30 seconds, tried charging, and everything works! Thanks!

Worked like a charm. Thank you. Got a Black and Decker for Christmas that wouldn't charge out the box. Did this with a fully charged Worx battery and now it's charging. 🤘🏾

This short video is perfect to explain its not a simple task to just buy batteries and "get more" out of our electric equipment. Thanks for explaining this to us.

I am a homeowner with a day job who does not do anything construction related for a living. That being said I am working on framing out my basement and Bought this kzfaq.infoUgkxHQsUrwNr5GQrnx9V4xDdUr56qxwuiBHt gun. I have done a few walls already, have probably shot a couple hundred nails through this thing and have yet to have a misfire. It works awesome, good depth on every nail if you have your compressor set right. My literal only complaint is that it is a bit heavy and my arm can get a little tired especially whrn I am nailing at odd angles. That being said I am super happy with it and would buy it again. Hoping the old girl allows me to get my whole basement finished out!

Just saved two dewalts and one Worx, you are the man. Thank you!

Worked great. I only left it for about 30 seconds and tested it and was already good. Thanks!

Dang this worked. I straight touched the wires from a good battery to the dead - literary touched it for 3 seconds and Wam- worked immediately. Thank you!

Thanks for the wire hammering idea . Saves me muck'n about with croc. clips and bits of metal . Perth , Western Australia .

Heard of this quite some time ago and didn't believe it, at least not fully but to my surprise it worked. Also great step by step guide. I'm not well enough informed to recommend this to others but it's a start, thanks a lot.

Thank you for this! I just attempted this and it worked with my 2 Milwaukees, had one at 20v and the other I couldn't even get a reading or at least a volt. Connected them for about 30 seconds and the 2nd reading jumped around 12 to 15v, the dead one then took the charge.

I like the way you just hammered the wire flat, I pissed around looking at Stanley knife blade's and picture hook's till I found four matching slim hook's

This rocks! I had a Craftsman battery that I never could charge. After putting on a small charge for like 30 secs, it started right up on the charger. So cool, thanks!

Thank you so much for such a clear and helpful video! Just "jump started" one of my Milwaukee m12 CP 3.0 batteries that wouldn't charge but would still start a tool, just showed low battery. Was registering a little less than 10 V, 80 seconds later, showing 10.8 V, showed two bars on a power tool, and plugged it into the charger and it started charging as it is supposed to. Again, thank you so much! Saved me buying another battery or a $73 service few to Milwaukee since it's outside the warranty range!

Dude, this was simple and to the point. I'm amazed at all the high quality stuff ur putting out these days. Beautiful!

Worked like a charm just like he said it would I can’t believe it. The only issue is you must have the same battery luckily I had one. Excellent! Works again.

No way man, this is fantastic. I have a real need for this! Thanks you so much!

Wow! Totally works. I saved a Dewalt battery and a Black and Decker battery with this method. Thanks. Saved me a bunch $

Thanks for confirming what our thought process had in mind-just used this on a Motorola Impress battery, 20 second jump start and now on the charger.

Your video just saved my batteries. It does work. Thanks!!!

I have 4 black and decker batteries I've had for over 20 years, 2 of them I have "rebooted" multiple times and they still work as backups. They tend to release their power faster than my new ones but they are there when i need them.

I like the solid wire trick. I use an auto spade connector with a test lead but those connectors are SO small I am always loosing them. I'll try yours. !

Super, thanks heaps! I had no luck with an 6Ah 18V (20V US) battery starting up a 9Ah 54V (60V US) battery but when I used a battery with the same voltage as you suggested then it worked! Whoohooo! I was nervous using my expensive battery to do it but it was a winner! Thanks again. I actually got ripped off on Facebook Marketplace after being sold a battery cheap and then getting home and it not charging and the bloke blocking me so I could not follow up! I felt pretty dumb but turns out I got 54V 9Ah battery for $90 Australian dollars. Whoohooo! Did I say thank you!!!!

Who knew! Great share. 💯💯💯 *Andrew, you are making me drunk too much. Every time you say, "Guys" I take a drink, and by the end of your video, I'm wasted! It's a throwaway word, much like when kids say, "like" three times in each sentence. It comes across as if you are trying to hold our attention. You're so good, we're not going anywhere! Thanks. 👍

Thanx, sceptical but I tried it , hot dang! It worked!

Thanks for saving me $180+ on my Lowes Kobalt 5amp battery! I really appricaite it 😊

I came across with your post and thank you very much..if you're near here I'm going to treat for a beer. I followed your instruction and My new battery worked!!!! Thank a lot sir!!. God bless!!

Thank you for a very easy, clear to understand, video.

I Did mines with 14 gauge wire I got from my neighbor and its worked. I did just as he said 5 min and place it on charger, it's charging back up. Thank you.

the trick is working.Very usefull! Thanks!

great info i need to try that on several my old defunct batteries

GGreat video, I have 2 bauer 20v batteries I'm going to try this with.

I wish I had another identical battery to fix my 24v but like you said, you need another 24v to do this. Thanks for the tip

Thanks a lot for this video! Checked 2 Mensela 2 Ah and 2 6 Ah (50 USD each). One showed 4 lights, the other a poor shadow of one LED, and it took no charge. Kicking, jump starting, the poor battery a few minutes, like You did, and it takes charging! Wow! No surprise. Opening the sad battery quite some electronics sits inside. If the voltage goes down too much the built in controller doesn't run and then no charging is performed.

It worked for me.. Thanks!

It worked. Thank you so much for this video.

Kite army I have an old model dewault drill the batteries doesn’t work is there a replacement that can fit to work ???

Going to gthe this a try. Thanks so much.

Thanks for the video, just saved three batteries 👍

Also you're able to do that the cheaper battery packs where you jumpstart them most high-end battery packs like Milwaukee have protection boards that won't allow this but the cheaper packs without protection boards you can

I fixed a dead battery I found from the dump for my ryobi tools works perfect

Thank you I worked for me. You got a new subscriber. I will tell everyone.

Thank you so much. Nice& simple. Direct& to the point

Omg I have like 6 batteries that won’t charge after watching this video im going to try this method great video

Thank you, I'm gonna give this a shot

Any other kind of wiring that we can use? Not sure I have some spare household wire lying around

Another treatment for li on batteries ,is to freeze them,then take them out of the freezer and let them thaw ,revives them

thank you and on a flashlight li-ion round batt

Great tips. Thank you.

Great, useful video. Clear and concise.

I have a Worx 24 volt battery that went dead. However, I do not have another 24 volt battery. I do have a 40 volt Black & Decker (higher) or an 18 volt Performax. But from what you sre saying, I MUST HAVE the same voltage? So I would either need another 24 volt good battery or I am SOL. Is that correct? What could happen that is a bad outcome if I tried using either the 40 volt or 18 volt to attempt the jump start the 24 volt? Just curious.

Awesome vid sir thxu!!

Awesome hack!!!! Actually works

Simple ,big helps thanks

Works like a charm!

Like the energy and subscribed

Can you use any battery to jump another battery?? Or do they have to be the same??

Great video it really helped me out thanks

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It is worth opening the battery pack [ I presume it is out of warranty, because doing this will void it]. The thing to do is to check each cell to see if the voltage on all are more of less the same. One or more cells on a lower voltage means those cells are toast, so this method will not work. If you are good with a soldiering iron you can de-solder the trashed one[s], replace them, and try again. [At your own risk, blah blah blah]. If you start a fire with a lithium battery, they are really hard to put out, even with the proper class of fire extinguisher, so there's that. If a Lithium battery gets too hot you will have a "thermal runaway" which is super bad news. The smoke emitted can be highly toxic. Some cells contain lead, nickel, cadmium, mercury, and electric car batteries, cobalt. If you breathe cobalt for example, you are dead. So if you are anywhere near such a fire, go upwind and away. FAST. Probably why such hacks are not recommended.

I have done this on car batteries and a lawnmower battery where the smart charger isn't smart enough to charge a completely dead battery, and 1.5[1.2]volt rechargeable AA batteries. It hasn't failed yet.

I'm going to try this!

❤ Thank you!

Can you do that with laptop battery? or phone battery? by end of life they used to be get a bit swollen

I did it and it worked tx a lot

It just works!!! 🥰🤙

I’m going to try this on my ego 5.0 hopefully it works🤞🏽

Wow bro it worked, you saved me a lot of $$$

You did right thing by saying don't do what I'm doing . Guys study li-ion battery and get an understanding what and why is going on or you can get a very nasty fire fast .

worked great thank you!!!!

What if I don't have a spare battery? Can I run the + and - terminals to the charger directly? I noticed mine has 4 terminals, but only 2 are + and -??

I've got 3 porter cable batteries that all simultaneously decided they'd charge for 30 seconds and then be complete. So I thought it was the charger. Replaced the charger. They'll charge for an hour now but then say complete. However you connect em to a tool, they are all dead. Porter cable also discontinued. So I don't know if they need a jumpstart or if I should just use knockoffs from now on

Thank You…🙌👍

Would that work with a halo bolt??

Just worked for me, dead one has green light on the charger anyway. Had to buy another $70 battery to do it, but now I have 2. It'll be nice not to have to swap from drill to drive.

Great video

Thanks

It's crazy I did that to jump start my truck years ago with my Ryobi 18v battery

THank YOU!!!

Why does the voltage have to be the same on the jump start battery? Wouldn't a more voltage battery equate to a better jump start? I used an 18v/54v dewalt jump start battery for my 10.8V dead lawn mower battery. It didn't work. I got the lawn mower battery to one signal light charged but that wasnt enough to get the charger to fully charge it. And I dont have a multimeter to test how many volts it is. Where am I suppose to find another 10.8V battery?

I have a dewalt 20volt 5amp that when put on a fast or slow charger it shows it charged. When u take it off it is dead. The charge lights don't light up at all. Tried doing the jumping it then lights up. Left it on for 5 10 15 mins didn't matter still said it was charged when I hook it to the charger? Any suggestions

I have a Craftsman V60 battery. How do I identify which is postive and negative?

So for how long we should connect the cable between the battery in order to jumpstart it ?

Thank you for saving me 💰

Thank you

I've got a cordless lawnmower battery that shows fully charged but wont power the mower for more than a few seconds....It's not the mower as a friend tried my battery in their same mower and had the same problem with my battery....any tips please?

What would happen if I used a 24v Kobalt battery to charge a 40v Hart battery?

WOW 😳 thanks 👍

I have a 36v ebike battery that has suddenly refused to charge (low voltage issue) - do you think this trick could work if I connected a 36v tool battery (of the type seen in your vid) for a few seconds in order to trigger a voltage boost and reset to enable normal charging? (using the proprietary charger).

Does the donor/working battery need to be the same capacity/output as the battery to be repaired? I have an M18 8-amp battery that needs fixin' but the only other M18 batteries I have for jump starting are 5.0xc

Tried on my Canadian tire impact 14.4 volt wrench and it worked. 14.4 v batteries are not made anymore. Thanks

I'll have to try it

I have been trying this on my 48v lawn mower battery. When I plug the last of the 4 connections in (be that +ve or -ve), it gives a spark and small explosion - any idea why that is? Anyway, by Jove it worked. Saved £160 for a new battery!

Can you do with a different voltage battery? I have a 40v that I need to jump but I only have a 18v battery from my drill.