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SECRET to Fix Drill Batteries that Wont Charge

How to DIY Fix Dead Lithium Drill or Tool Batteries without replacing them. Fix Drill Batteries That Wont Charge. Here are the replacement batteries https://amzn.to/3tHyij6
This is for batteries that are no longer working or that will not charge. This works for 20v, 18v or any lithium battery for your tools. It works for Dewalt, Makita, Milwaukee, Ryobi, Black and Decker, Rigid, and more.
Here are the replacement batteries https://amzn.to/46qNRdq
#drillbattery #deaddrillbattery #toolbattery



  1. Its works as long as one of the cells doesn't overheat. they all use the same Panasonic battery(cells) collect all dead or discarded batteries. They're easily repaired by swapping out the blown cell. Ive done quite a few of them already the last one took about 5 minutes before I had it back on the charger..

  2. Will it work if both batteries are dead?

  3. Great tip. I haven't used this on power tool batteries, but similarly I've found that on car batteries, the newer chargers with all the sensors can have the same problem with very low batteries. So have yourself an older style car battery charger that will push charge Into it. Then you can use any charger after that.

  4. The same problem happens with normal 12 car battery chargers, they have to see a certain voltage coming back from the battery to check polarity before starting a charge cycle, it is also a part of the 'anti-spark' and short circuit proofing that if you connect the clips together the charger will not pass any power. Sometimes to charge a battery you need to connect a 'good' battery in parallel to start the charge and after 10 minutes take the good battery away and the charger will happily carry on.

  5. It did not work on any of my dead battery’s

  6. How do you fix battery chargers to power tools ?! Or a battery with out a charger?!

  7. do not "TOSS them in the garbage" Be responsible! Recycle!

  8. What about if you only have one battery?

  9. Having trouble with my 18 v Makitas, 3 of them wont take a charge

  10. I think my Samsung tablet has this problem. Any ideas on jump starting it?

  11. Thanks for the instructional… some comments…. because… well… this is the "Comments" section 🙂

    – The battery doesn't "send a signal". The charger checks for a minimal voltage to ensure the polarity of the inserted battery is correct. That way if you put some ancient Chinese battery in where B+ and B- (Battery positive and battery negative) reversed, it won't short anything.
    – The minimum voltage is around 2VDC. You can test your "dead" battery with a multimeter and if the voltage is below that this trick will work. If the voltage is above that there's another problem. If the voltage is truly at 0 then likely there's a dead cell in there or a break and nothing will fix it.
    – Always ensure that the "good" battery and the "bad" battery are similar in voltage. In other words don't try to charge a 12V battery from an 18V one or an 18V battery from a 24V one. If you're using other manufacturer batteries to charge, you can exceed the "bad" battery's rated voltage by a bit (usually 10% is safe) but reading the specs for "maximum input voltage" is smarter.
    – One second is not sufficient for a battery that's been sitting around discharged. There is no harm to leaving it connected more than the one second. The real harm only occurs when you first plug it into each other. If nothing fries, leave it in for 1-5 minutes.
    – You are taking a risk that the "good" battery and the "bad" one will completely equalize, at which point both will be half charged, but you've got the ability to charge both to 100% now.
    – Always ensure your "good" battery is at 100% or close before doing this. If it's sitting too low and it gets cut by 1/2 to charge the other one, you may end up with 2 batteries with a voltage too low for the charger to start charging.
    – LiOns will recover quickly. NiMh will take that 1-5min. NiCd… good luck. Also don't try this with car batteries, because both LA and AGMs tend to undergo chemical processes that need VERY high voltage (search for "I used my welder to fix my battery" to see how many hundreds of volts are needed) and there's always the potential for an explosion with acid anywhere.
    – LiOn is not the same as LiFePo is not the same as NiMh in that 12V requires different (higher) charging voltages for each type, but not high enough to kill the battery. Read the label to see what it is, and google "maximum charge voltage 12V LiOn" or whatever.

    In general this practice works. It won't restore your battery to new, but it will allow some limited use until it dies, which it's already indicated to you it wants to die. Put "new battery" on your amazon wishlist and send to your friends. It's safer and cheaper in the long run.

    Stylistic: if you're going to make a YouTube video showing how to connect two B+ terminals, using a red cable is perfect. For the B- terminals, go splurge on a black cable. Don't complain the wire gauge is too thick — it's YOUR video. Hit PAUSE and go buy 2 1' cables of the right gauge at your nearby hardware store. That $0.50 you spend (yes on both wires) will make your video a lot more pro than trying to explain away why the cables YOU chose to make on YOUR video which YOU edited and YOU posted are the wrong cables.

  12. Fixed multiple batteries this way. Thank you!👏👏👏

  13. What gauge wire do I need to charge the batteries? I have the exact ones you demonstrated first. They are ok for now, but I’ve had to get rid of two sets now. I’m so happy to see everyone commenting that this hack works. Thankyou! 👍🏻

  14. Thanks a lot for this video.
    Is this method works with laptop battery?

  15. What kind of wire exactly? What is that clamp wire device called?

  16. Have tried this numerous times with no success.

  17. 分析的好,有深度也很符合实际。

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