 A primary cell is a Galvanic battery that is designed to be used once and discarded, in contrast to a secondary cell (rechargeable battery), which can be recharged with electricity and reused.In general, the electrochemical reaction occurring in the cell is not reversible, rendering the cell unrechargeable.As a primary cell is used, chemical reactions in the battery use up the chemicals that generate the power; when they are gone, the battery stops producing electricity and is useless.