SECRET to Fix Drill Batteries that Wont Charge

Here is a replacement battery if needed amzn.to/3voqOCJ

Lithium batteries are not designed to be used beyond a low threshold of power, usually nothing less than 40% or so, and in most cases the internal circuit board is the charging monitor and it is designed to shut off at a specific point to not allow a lower level of discharge. If a battery sits long enough it will self discharge below this level. Jumping the dead battery charges the capacitor on the monitoring circuit, allowing it to believe it has the lower limit and it adjusts to allow charging. I use an 18 GA wire with a bent loop at the end to plug into contacts lie this in order to not spread the contacts too far. This is a good video, Thank you for posting.

I just did this to 3 dead Dewalt batteries, and it freaking worked!!!!!! Thank you so much.

So.... That worked like a charm!! I watched the clip earlier, gave you the like before I tried it I was that confident. Worked so well I had to return and comment. So for all those who've done this and it worked, Thank you!

We followed your instructions with the wires. Thank You it worked. Wouldn't have known this if we hadn't seen your video .

What a brilliant tip !! I had a battery that I thought was dead and had put it to one side for when we went to a battery collection place. I saw this tip and gave it a go.....WOW !! Just gave it a one second jump and tried it in the charger and hey presto, battery now charging. Thank you so much for sharing this with us.

No way..they say you learn something new every day..Thankyou so much for sharing that with us..Have an awesome day & Take care,xx

Tried it on one battery I've had at work that has been dead for a couple of years now just sat in a corner of my box forgotten. Did the trick and it's charging. AWESOME THANKS 👍

Straight up worked. Used 20v DeWalt to awaken 20v Bosch for about 3 seconds. Charger blinking now! Ty.

THANK YOU SOOOOO MUCH! Had two new Black & Decker batteries that had been left too long without use and the charger would just flash red errors and do nothing. This worked INSTANTLY! They're now charging green!

ABSOLUTELY happy to like your video. Thanks so much for sharing this. Wiring the batteries in parallel is a great tip to transfer just enough power to trick the charger. I had an old mobile phone battery that would not do anything and after putting it on and off the charger many times with zero life I put it in one last time and then it initiated the charger and charged and it's been fine ever since. But you're video jogged my memory so I can't wait to try your idea on my DeWalt 18 volt batteries that are lifeless through lack of use. I love my cordless tools but whenever you need a tool without fail it's always the Old Faithful corded tool that never fails. Cheers again.

Wow. Just tried this on my small lithium flashlight batteries and it also worked. Thank you.

Hands down the best video I've seen on YouTube. You just saved me about $200! Thank you so much.

Thank you from the UK, something i had never thought of, had two dead 1.5 mah B and D batteries, jump started from a 2.5 mah Power Exchange without issue, saved me buying yet another drill.

Literally the most useful YouTube video ever!!! Thank you sir!

U the man I'm sitting in home depot and about to go buy new batteries and it worked u just saved me a good bit of money thank God for YouTube

Thanks for this video. I have a Dewalt battery that was “dead”. I followed your step by step video and viola…my battery is charging again. Saved me a lot of $$$

This revived my 14v DeWalt battery. Thank you.

Worked for my 18 volt lithium. Went from 2.3v measured to full charge 18v. Held the wires for about 15 seconds. Thank you!

tried it . . . it WORKED!!!!!!!! The DeWalt 20V would not turn on the charger, but after I followed the directions in this video, it charged and charged fully!! This video is worth its weight in gold.