Secondary (Storage) Batteries

Author: E.E. Kimberly

A secondary or storage battery is a device of one or more cells for storing energy at one time for use at another time. Energy is put into it in the form of direct-current electrical energy and is delivered from it in the same form, but is stored in the form of chemical energy. After the battery is assembled, the energy is put in by "charging" with direct current. When the battery is delivering energy, it is said to be "discharging." A battery may be charged and discharged many times before it is worn out. In charging, a direct current is forced through the battery in opposition to its electromotive force.