A voltaic battery that stores electric charge WordNet 3.0 & Open English WordNet

A rechargeable battery, storage battery, or secondary cell, is a type of electrical battery which can be charged, discharged into a load, and recharged many times, as opposed to a disposable or primary battery, which is supplied fully charged and discarded after use. Wikipedia

An accumulator is an energy storage device: a device which accepts energy, stores energy, and releases energy as needed. Wikipedia

An apparatus for storing energy or power Wikipedia Disambiguation

Type of electrical battery which can be charged, discharged into a load, and recharged many times; device that stores energy Wikidata

A rechargeable device for storing electrical energy in the form of chemical energy, consisting of one or more separate secondary cells. OmegaWiki