How long does a car battery last?
The lifespan of a car battery is about four years. The condition of the charging system. Driving conditions, and temperature all determine the life of the battery. Common signs of a battery at the end of its service life are slow engine cranking. Longer cranking times in colder climates, and dimming headlights or accessories. To Safely jump start a vehicle. connect positive cables first. Then negative cable last to a metal component on the engine of the vehicle with dead battery.