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An electric battery is a device consisting of one or more electrochemical cells that convert stored chemical energy into electrical energy. Connected a battery's negative to another's positive is a way to increase voltage, useful when a battery outputs low voltage.

4 votes

How can a smartphone's extended battery be same size as the original battery?

Hypothetically, battery technology could have improved between the release of your phone and the release of the third-party battery. It's not very likely though, as the other commenters have said, giv …
clacke's user avatar
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