You should only allow your car to run long enough to bring you home or to a store or garage, the first thing you need to understand is why you need a jump-start car service. If the battery is dead, a charge of the battery should be installed with an overnight base to allow you to destroy the batteries if you have done something incorrectly. You must first determine if anything else occurs, such as rust on the battery wires resulting in a faulty electrical connection, or if your battery is old and needs to be replaced. The key to keeping everything functioning together is having clean electrical connections between the battery, alternator, and vehicle ground. The vehicle's alternator is not designed to act as a battery charger. Its major role is to keep the battery from discharging during regular driving by assisting in the operation of all electrical equipment such as the engine ignition, air conditioning, headlights, electric radiator fans, radio, and so on. If it needs to charge a dead battery and run everything without a little aid from the battery because it is not going fast enough for the little fan (fins) on its pulley to keep cool, it puts a lot of strain on it and heats it.