Definition of batteries:
(n) :
(electricity, electronics, countable) A device used to power electric devices, consisting of one or more electrically connected electrochemical cells or (archaically) electrostatic cells.
(n) :
(metonymic, informal, uncountable) The energy stored in such a device.
(n) :
(originally and sometimes still, strictly) Such a device that has multiple cells.
(n) :
(law) The infliction of unlawful physical violence on a person, legally distinguished from assault, which involves the threat of impending violence.
(n) :
(military, countable) A coordinated group of artillery weapons, with any of various numbers of guns.
(n) :
Such a group of a certain size (number of guns and artillerists), within a schema of military unit organization.