An electrical storage device that uses a reversible chemical reaction to store energy. It uses a combination of lead plates or grids and electrolyte, consisting of diluted sulfuric acid and water to convert electrical energy into potential chemical energy and back again.

A storage battery using lead (Pb) and lead peroxide (PbO2) as the "active" materials and an electrolyte solution of water and sulfuric acid (H2SO4). A storage battery changes chemical energy into electricity.

Any battery that consists of lead and sulfuric acid, has a capacity of six volts or more and is used as a power source, such as a car battery.

Slightly larger than a car battery, these have internal plates made of lead or a lead alloy, surrounded by a sulfuric acid electrolyte. Car batteries are made with softer plates. Lead-acid batteries are commonly used in solar and wind energy systems.

A battery which uses lead oxide and spongy lead electrodes with sulfuric acid as an electrolyte. Generally, they consist of several cells put in series to form a battery, such as an automobile battery. The group of cells are generally in a polypropylene container. The advantages of the lead-acid battery are commercial availability, recyclability and low cost. The disadvantages are that they are heavy and the amount of energy stored per kilogram is less than other types of batteries.

Lead-acid batteries, invented in 1859 by French physicist Gaston Planté, are the oldest type of galvanic cell battery. Despite having the second lowest energy-to-weight ratio (next to the nickel-iron battery) and a correspondingly low energy-to-volume ratio, their ability to supply high surge currents means that the cells maintain a relatively large power-to-weight ratio. This, along with their low cost, makes them ideal for use in cars, as they aptly provide the high current required by automobile starter motors.