Revive DEAD Battery Packs - Rebuild Repair - Dewalt Milwaukee Makita Ryobi Bauer Ridgid 18v 20v 12v

Power tool battery packs easily saved. Save it from the cursed Charger Flashing.

Replacement battery cases/boards

Internet " you can't solder on cells" Me "been there done that"
A common 18650 Max operating Temp is 75C/167F That's hotter than you can hold and is common after heavy use(I've personally tested it). Soldering tabs on generally only gets to the barely warm phase. True solder doesn't melt until 375F but spot weld needs to be at least 2550F to bond. The spot weld is a second long. The solder is 7 seconds long. Just so happens 2550F is 7times more than 375F..... Go figure.

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[sixtyfiveford]

🚨WHAT I USE IN THE VIDEO

Replacement battery cases/boards

[scottgerlach]

Did you notice that the failure battery is always the 1st one in the series. This is due to overcharging, the chemicals in the battery overheat and degrade. Its common in all batteries including phones. Very instructive video. Kudos.

[MakingStuff]

Great info! I have several packs that the BMS failed. The cells are still good but the little circuit board inside is bad. I take the cells out of those and use them as replacements as needed.

[Stevesbe]

I got 2 Chinese makita batteries for $32 from ebay they lasted a few months both shorted out with high amp draw tools. They sent me 2 new ones and the same thing happened .I bought some decent new cells from the 18650 battery store for $2 each and rebuilt them and they are amazing way better then any factory makita pack

Thank you for taking the time to put the video together. I am an electrician of many years but you tought me something new, thank you especially about laptop cells and internal resistance pairing

[Sommers]

Figures. Manufacturers want us to buy new but often isn't necessary. Great job showing us how to save money and be easy on the environment.

[twistedhillbilly]

Even if I don't have a need for a pack, I harvest the cells and convert everything I have to use the 18650's I've done maglites air and water pumps, a lighted collar for the dog, anything I can fit them into.. just pay attention to the voltage...

[nemoa]

You never want to replace a single cell unless you test the internal resistance and you pair it with cells of similar internal resistance. Otherwise you are setting yourself up for disaster. Also only solder the battery if you are completely confident in you’re skills. If you insist on doing this, buy a little spot welding machine… and please be sure to match internal resistance, because tools these days draw a lot of watts and you don’t want a thermal runaway situation on your hands.

[davidbiloen]

Amazingly informative!! You are one hands-on dude with zero BS 👍🏻

[robertragland]

I like the setup of your shop. Makes a great background that any gesrhead would admire. Looks like a ideal spot to enjoy a cold beer and good friends. Excellent video dude.

[patrickhandyside]

I have to say I rarely find a video on here that genuinely makes me happy I learned something new. I was well aware of the batteries inside these packs, but never even thought to try to open one. I have the individual 18650 charger for my vaping batteries which indecently are the same cells just usually much higher drain. Anyways I have so many old packs that don’t charge well that I can now mess with and try to make good again! Thanks for the amazing info.

Please if you have a chance do some videos on building/repairing or improving EGO batteries for blowers trimmers and mowers if you could. Thanks again definitely earned a sub and a like!!

[brentjohnson]

Very good video. I have been fixing the small tool batteries in my Ryobi One+ (18v) for years. Most of the time, I take out the batteries and bypass the BMS and charge/jump it with a good back. Then if it charged up, I put it on the charger and 90% of the time I am good to go. Very occasionally I find a bad cell and grab one out of my stash and I am good to go. Good advice and description on this video. All the best!

[richardclifton]

First off: Give Ginger another biscuit.

I had similarly the same issue with solar-powered lights. The solar panel was tested and it was putting out the needed voltage to keep the batteries charged, so I figured it had to be the batteries not accepting the charge. I went and ordered a 10-pack of matching batteries because I had 3 of these same lights. I tested the batteries on each one just like you did. I disassembled them because the new batteries cost me around $15.00 for ten of them and each light cost over $40.00 new a few years ago, so the expense was worth it.

Once I disconnected the old batteries that showed no power and soldered in new ones I saved 3 lights from the dump.

By the way, those 3 solar lights went almost 3 years without a problem, so hopefully, the new batteries will last just as long. I think it took about an hour to repair each one (disassembly was a headache), but well worth it as they live again and it didn't cost me another $150.00+ (Current Prices) to replace the lights. I still have 6 batteries left over, but it was cheaper to buy them in quantities of ten than one at a time.

P.S. I don't throw anything away intact. If I can recover a screw, bolt, washer, etc. from it, I do. This has saved me many trips to the hardware store when building something totally different.

[zxztv]

Lithium cells are quite impressive for there size, just look at modern jump start .
So much current, amazing.
Your dog is just loverly, she is so forgiving.

[jayleeb]

Thank you so much for this! I just won a $700 e-scooter and it came with a junk battery that only lasts like 10 minutes and the company that makes it went under so buying a new battery is out of the question. I broke the battery down and was thinking I would have to replace all the cells but now that I found your video I know how to test each cell so I can hopefully get this thing running. Thank you again, subscribed!

[Peter-zfo]

Very well done and informative. Many diy ers have no idea this can be done and will spend tons of money on. A new battery pack.

[anonimoporsiempre]

Thank you very much for you time teaching how to repair the batterys 👍🏼👍🏼🤝 03-27-2023 7:18pm. ⌚

[vsvnrg]

ive found you to be the most informative source when it comes to anything relating to cordless tools and batteries. not all li-ion batteries are created equal. some of the older hilti and dewalt use lithium iron batteries which have a lower voltage rating but higher recycle rate and cant be charged off li-ion chargers.

[motd]

Got my subscription off this video. I have a dead Craftsman battery pack that I didn't want to spend $100 to replace. Definitely going to do this instead! Thank you!

[googacct]

I have pulled apart a few of my bad battery packs, but have not gotten around to replacing the cells. The M12 is a bit tricky to pull apart. What I found worked well for getting the cells out of the tight battery pack is to put some hot melt glue on the end of the battery and attach some kind of puller. I use the pullers that are used in paintless dent repair.