battery

1. A device used to power electric devices, consisting of one or more electrically connected electrochemical cells or (archaically) electrostatic cells. (countable) · alkaline battery· sodium-ion battery
2. Such a device that has multiple cells. (countable, uncountable) · Her phone needs a new battery because its present battery no longer holds a charge well.
3. The energy stored in such a device. (informal, uncountable) · Her phone did not have enough battery for another phone call.· A: How much battery do you have left? B: Only 63%.
4. The infliction of unlawful physical violence on a person, legally distinguished from assault, which involves the threat of impending violence. (countable, uncountable) · Holonym: assault and battery
5. A coordinated group of artillery weapons, with any of various numbers of guns. (countable) · Outside the ancient fort, you can still see worn areas in the stone where the batteries were once placed.
6. Such a group of a certain size (number of guns and artillerists), within a schema of military unit organization. (countable, uncountable) · They sent four batteries southward in an attempt to shore up the defenses around the depot.
7. An array of similar things. (countable, uncountable) · Schoolchildren take a battery of standard tests to measure their progress.
8. A set of small cages where hens are kept for the purpose of farming their eggs. (countable, uncountable)

Plural batteries