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Battery. A battery is a hardware component that supplies power to a device, enabling that device to work without a power cord. Batteries are often capable of powering a laptop computer for several hours depending on how much power it requires.ou are here: Dictionary B-Definitions. A battery is a hardware component that supplies power to a device, enabling that device to work without a power cord.
Battery is a nice and simple battery management app. It displays the current status of your battery, how much time you have before the phone turns off and other useful information. But that's not all, this app also allows you to easily enable/disable various phone services. This can further extend the life of your battery, when you need it most.