An electrochemical cell is a device that generates electrical energy from chemical reactions. Wikipedia

A device used to convert chemical energy to electrical energy Wikipedia Disambiguation

A device which produces electricity through chemical reactions, commonly referred to as a battery Wikipedia Disambiguation

Device capable of either generating electrical energy from chemical reactions or using electrical energy to cause chemical reactions Wikidata

Class of electrical power sources Wikidata

The basic building block of a battery. It is an electrochemical device consisting of an anode and a cathode in a common electrolyte kept apart with a separator. This assembly may be used in its own container as a single cell battery or be combined and interconnected with other cells in a container to form a multicelled battery. OmegaWiki