Lead-Acid Storage Battery

an accumulator with an acid electrolyte in which the active material of the positive electrode is lead peroxide and that of the negative electrode is lead sponge. The conversion of electric energy to chemical energy (charging) and the reverse process (discharging) occur as a result of the following reactions:

Lead-acid storage batteries have a comparatively high discharge voltage (2.0–1.8 volts) and a relatively long service life. They possess high mechanical strength and are reliable. They have long been used in laboratories and in transportation and communications equipment.