When it comes to think about the batteries under the hood of our cars, we can say, a car battery stores power for the vehicle to start, provides energy to start the engine, delivers electricity to the ignition system, works with the alternator to power the electronics and helps to regulate the voltage.Reasons for a battery fail1. Internal connections may break due to corrosion.2. Short-circuited cell3. Plates break from corrosion and vibration4. Low electrolyte level5. Sulfation due to no use…See More