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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. noun. 1. power unit The shavers come complete with batteries. 2. artillery, ordnance, gunnery, gun emplacement, cannonry They stopped beside a battery of abandoned guns. 3. range, lot, collection, variety, selection, array, assortment, gamut Crack is part of a battery of drugs used by addicts.attery-a device that produces electricity; may have several primary or secondary cells arranged in parallel or series. electric battery. A battery-the battery used to heat the filaments of a vacuum tube.