An automotive battery is a rechargeable battery used to start a vehicle and power its electrical systems when the engine is off. It primarily supplies the necessary current to the starter motor, ignition system, and fuel system to crank the engine. Once the engine is running, the alternator takes over to power the car’s electrical components and recharge the battery. Most automotive batteries are lead-acid type, known for their high power output and reliability. They are designed to deliver a quick burst of energy, known as cold cranking amps (CCA), especially important in cold weather. These batteries typically operate at 12 volts and come in various sizes to fit different vehicles. Regular maintenance and proper charging are essential to extend battery life, which usually ranges from 3 to 5 years. Modern vehicles with advanced electronics require batteries with enhanced capacity and stability. Maintenance-free variants are now common, offering sealed designs with minimal upkeep. Over time, corrosion, vibration, and heat can degrade performance. Signs of a failing battery include slow engine cranking, dim lights, and warning indicators. Replacing an old battery with the correct type and rating is crucial for optimal vehicle performance. Overall, automotive batteries are vital for reliable vehicle operation and safety.