Sources of voltage that can be recharged.

See Cell, secondary.

Electrolytic cell used to store electricity. Once discharged may be restored by recharging by putting current through the cell in the direction opposite to that of discharge current.

Any combination of two metals or metalloids immersed in an electrolyte which in itself will not produce electricity without first having the metallic portion of the element decomposed by the passage of electric current.

A secondary cell is any kind of electrolytic cell in which the electrochemical reaction that releases energy is reversible. Widespread examples are rechargeable batteries found in portable consumer electronics such as notebook computers and cell phones, and car batteries.