It took 3 tries with the battery taped in before there was significant enough damage that the drill wouldn't work anymore. I duct taped the battery into the drill and tossed it again. Once again, I tossed the drill as high as I could and let it come down on the blacktop. I asked everyone to step back and tossed the drill as high as I could and let it come down on the blacktop. That was all the incentive I needed to trash it. I was at a volunteer function, building some ramps for a Soap Box Derby race when the clutch on my 12V started to slip. Since the 18 Volts were available, along with a number of standalone tools that would take the same batteries, I decide to upgrade. When my second set of 12V Dewalt batteries started to go bad, the drill was also getting a bit tired. Just curious if anyone has tried to repair batteries on your own, and if so what was the result and what did it cost? Without putting in new cells, I don't think there's much you can do and new cells cost a lot more than $2.00 (at least the amount I'd need for an 18V pack). I know a little about electronics and battery chemistry, and I'm pretty sure that when NiCD batteries die, its the chemistry inside that's the cause. These claim to be able to repair old batteries, specifically for tools, for either nothing, or at most $2.00. Anyway, looking on ebay for new batteries since HD wants $80 apiece, I see several people selling 'How to repair your old battery packs - like new performance' guides. Maybe it's the saw, but me-thinks it's the batteries since they're about 5 years old. The drill still works okay, but when ripping 2x4's into 2x2's with the circ-saw, I get about done with one before the saw doesn't want to go anymore.

I think my DeWalt 18V batteries are on their last legs.

Dewalt batteries rebuild