In telegraphy, the source of power that actuates the telegraphic station recording instruments, as distinguished from the source of power that furnishes current to the line.

A stamp mill.

plural of battery cage

A battery whose purpose is, in addition to powering an electronic device, making the powered device permanently unusable once the energy runs out.

plural of battery mate

The time that a battery lasts

(literally) Acid used as electrolyte in a battery, usually sulphuric acid. / (military slang) Coffee.

Synonym of battery-powered

fitted with a battery or batteries, which provide(s) the power to operate the device.

plural of battery booster