The zinc-carbon battery is one of the classic batteries, also known as the manganese dioxide-zinc element, because the positive electrode
, the cathode, contains, among other things, manganese dioxide. Because it can be manufactured extremely cheaply, it continues to be widely used. Zinc-carbon batteries are concentric in
design.They consist of a round zinc container, which forms the negative anode, containing the electrolyte
, a solution of ammonium chloride. The central component is the positive cathode. It consists of manganese oxide in which a carbon rod is centrally located. The carbon rod together with the manganese oxide forms the positive cathode. The electrodes are led to the outside via a metal cap and the metal base.Wh/kg and the self-discharge is 7% per month.