Lead–acid battery
OverviewApplicationsHistoryElectrochemistryMeasuring the charge levelVoltages for common usageConstructionCycles
Most of the world''s lead–acid batteries are automobile starting, lighting, and ignition (SLI) batteries, with an estimated 320 million units shipped in 1999. In 1992 about 3 million tons of lead were used in the manufacture of batteries. Wet cell stand-by (stationary) batteries designed for deep discharge are commonly used in large backup power supplies for telephone and computer centres, grid energy storage, and off-grid ho