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My 9 mth old MBP recently had to go in for repair (power port). Since it came back, the battery only charges to 96%!
Is there anyway to check ‘my’ current battery is the original one?
The "percent charged" value is an estimate based on a number of values reported by the battery. It is not expected to be particularly precise, since room temperature, recent usage and other factors can change those values moment-by-moment.