Automotive batteries, commonly known as car batteries, are rechargeable batteries that provide electrical energy to start a vehicle's engine and power its electrical systems. The most widely used type is the lead-acid battery, which delivers high surge currents needed for engine ignition. Once the engine is running, the alternator charges the battery and powers the electrical system. Modern vehicles may also use AGM (Absorbent Glass Mat) or lithium-ion batteries, especially in hybrid or electric vehicles. Regular maintenance