I have a dw9116 charger. It does not seem to be charging either battery I have. The batteries are OEM, but old. When I try to charge one, after about 5 min, the charger will rapid blink. However, one battery is reading about 19.1v, and the other 14.3v. As well, if I plug in the charger with no battery, it will even rapid blink after about 5-10 min as if there is something wrong. The charger is about 16 years old. Do you think it is dead? Can I test the charger some how? Thank you.
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