I have 2 18 650 Samsung 25r batteries that I charge as a couple always yesterday one of the batteries read 4.21 volts and kept charging on a smart charger is that bad what was going on is it the battery is bad or the charger is bad please answer before something bad happens I asked a guy on YouTube that does reviews on batteries and said it happens sometimes up to 4.5volts?
closed as unclear what you're asking by winny, Lundin, Scott Seidman, Dwayne Reid, MCG Jan 8 at 15:47
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