The main purpose of your vehicles 12V battery is to supply the starter with enough energy to start the engine. However, what many might not be aware of is that the battery never stops functioning once the engine is started. Yes, you read that correctly. The electrical systems in your vehicle are still supplied by the battery whether it be the radio or A/C, these systems all derive energy from the vehicles battery. This is why it is very important to have a safe and reliable battery to start and feed your vehicles electrical systems with the power they require. Let the professionals at Pal Auto Service & Body Shop test your battery for the ideal amperage and see if your vehicle requires a new reliable battery.