Re: battery dies out when parked
He has what is known as a parisitic draw or an unwanted drain on the battery. Somthing like a bad switch could cause this. If it drains the battery in 9 hours it is most likley somthing that is drawing alot of current. The battery should have the power to last for longer than that. Im not sure exactly what could be causing the drain, but more than likley it is somthing that requires alot of current since it drains it so fast. The only thing that I can think of is to check anything that he might of installed such as a CB or anyother after market electrical accesories.