Battery is very important part of vehicles, it supply electrical energy to a motor vehicle. It is also known as starting lighting ignition battery and its main function is to start the engine. Once the engine is start, power for the car's electrical systems is supplied by the alternator. Now we can get batteries for Fiat car's online and offline. We should know what capacity battery is fitted in our cars. According to company we should go with oem fitment of battery. Petrol and Diesel car have different battery fitment.