Had 2 batteries flashing red. Both had broken solder joints at the terminals. After melting the solder joints one recharged but the other didn't. I'm suspecting I over discharged the cells that the charger didn't want to recharge it at all. I tried your boost method a few times. The final attempt I had all 4 terminals connected for around 10 minutes then went to charge it. It charged and the battery works now. Just saved myself $200 bucks by not having to buy new batteries. If I could give you more than 1 thumb up I would. Thanks, dawg.
You’re the man! For the record, this just worked simply bumping the positive and negative in a 18v battery. Same theory, just bumping it. I’d STRONGLY recommend monitoring that particular battery as lithium ions are very finicky but occasionally just sitting too long with no charge can put them past where they will want to charge according to these chargers. I appreciate them “playing it safe” and not burning me however, at $100 a pop.... sometimes the juice is worth the squeeze in a controlled, safe environment.
I had a totally dead battery and kept it in my tool box for over a year. It was flashing the red light on the charger.... i found your video yesterday and now after doing this to my battery twice today, I now have a charging battery. thanks a lot man \m/
I had a battery that I was getting ready to toss and came across your video so I tried it and its now on the charger taking charge not sure how long it will last but thanks for sharing!!
Worked thanks. I reckon a lot of people throw away batteries and tools assuming the battery is dead and after learning that a replacement battery is expensive or almost same price as a new more modern higher torque etc drill+ battery. When , actually the battery is ok but just requires this kickstart to raise it's voltage to a value which the charger will accept and continue to charge it. Very commion issue with NiCd batteries when owners forget to charge them occasionally and/or only rarely use the power tool.
Well, I figured this would be too good to be true, but I gave it a shot. Unfortunately, that was the case. Sadly, we no longer have a snap-on guy that comes to where I work. The upside to that is my snap-on bill has been going down, instead of consistently up no matter how much I paid.
Good job vato..I was in hurry I only power one side . didn't work.yeah..if battery sits too long don't mean no good.or..ig it sits in tool long time without use it will drain..just like your car.disconect battery..
WAY COOL, but what did you do there exactly? Was it re-polarizing, or just boosting/jumping some juice into the dead one because it was so dead the chargers circuitry couldn't "see" it? What was the actual issue and reason that this resolved it?
If your charger don’t charge anymore with any battery open it up and move the potentiometer but make sure you put it back in same place . This will make it charge again. I have already done this with 2 chargers.
What if I only have one of these batteries? I found mine in a junk car a few years ago, when I worked in a junk yard. The battery was fully charged, and now where I work my boss has a charger that works for my battery but now it won't charge.
Its a batt protection inbthe circuit board , under a set voltage parameter the batt will show bad. As lone as you dont run the batt to low you shouldn't have to do this at all... .but @hit hapoens... this works on nimi batts to.
It's not really "Fixing" it.. low cell needs replacing, or better still, complete re cell. But yes this will work, but for how long?..thanks for the vid!..
