Going to need a little more info. If the battery is real low, it should be charged with a battery charger, it takes a lot of driving to charge a real low battery with the car and its not real good on the charging system. If the car is shut off can it be restarted, If the car sits for a day or two does the battery go dead? You may want to have the battery charged and tested to make sure its good. A simple test to check the charging system is to check the voltage at the battery with the car running at a fast idle, it should be between 14-14.5 volts.