Battery (electricity)

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Battery
Batteries.jpg
Various cells an batteries (tap-left tae bottom-richt): twa AA, ane D, ane handheld ham radio battery, twa 9-volt (PP3), twa AAA, ane C, ane camcorder battery, ane cordless phone battery.
TypePouer soorce
Wirkin principleElectrochemical reactions, Electromotive force
First production1800s
Electronic seembol
Battery symbol2.svg
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.