LEAD-ACID BATTERY

"A rechargeable battery. During discharging, the reaction on the positive electrode is the conversion of lead dioxide to lead sulfate, while on the negative electrode it is the conversion of metallic lead to lead sulfate. The reactions are reversed during charging. The current collector can be lead in both electrodes. The electrolyte is sulfuric acid. While it is one of the earliest practical storage batteries (1866), it is still very widely used today, e.g. as automobile starter battery. "