The principle of golf cart batteries is that they belong to batteries. It uses a lead plate filled with sponge shaped lead as the negative electrode, a lead plate filled with lead dioxide as the positive electrode, and 1.28% dilute sulfuric acid as the electrolyte. During charging, electrical energy is converted into chemical energy, and during discharge, chemical energy is converted back into electrical energy. When the battery is discharged, the metal lead is the negative electrode, which undergoes an oxidation reaction and is oxidized to lead sulfate; Lead dioxide is the positive electrode that undergoes a reduction reaction and is reduced to lead sulfate. When a battery is charged with direct current, the two poles generate lead and lead dioxide, respectively. After removing the power source, it returns to its pre discharge state and forms a chemical battery. Lead acid batteries are batteries that can be repeatedly charged and discharged, called secondary batteries.