|Wirkin principle||Electrochemical reactions, Electromotive force|
The symbol for a battery in a circuit diagram. It originatit as a schematic drawin o the earliest type o battery, a voltaic pile.
An electric battery is a device consistin o ane or mair electrochemical cells that convert stored chemical energy intae electrical energy. Single-use batteries (primary cells) must be discarded when exhausted and replaced by new ones. Rechairgeable batteries (secondary cells) can be re-charged and re-used many times.