2019-6-19 · battery (countable and uncountable, plural batteries) (countable, electronics) A device used to power electric devices, consisting of a set of electrically connected electrochemical or, archaically, electrostatic cells.A single such cell when used by itself. 1749 Benjamin Franklin, letter to Peter Collinson Upon this We made what we call’d an Electrical Battery, consisting of eleven Panes of ...