Uploaded February 2019 | Updated September 2026, 2 weeks ago

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I've got a Dewalt battery that says it's fully charged, but when I connect it to a USB adapter the power meter shows nothing. I found the electrical terminals inside spread apart over time, and the positive side is prone to damage when it gets too hot. This battery is missing a little prong on the bottom left. So I cut a piece of copper and bend it into a "V" shape. Then slide it into the busted terminal.