Grave Digger Rc Body Trying To Find A Battery For A TycoRC Grave Digger... Help?

Trying to find a battery for a TycoRC Grave Digger... Help? - grave digger rc body

I am looking for a replacement battery for is a 2003 Tyco RC Grave Digger monster truck remote control, but can not find in a store or Web site that knows the specific needs of the battery. I only know that 7.2 volts. Does anyone know exactly what is 7.2 V with this car?