Sorry for the long delay in responding, but I was away from the computer for a few day's.
1st off, the battery isn't totally dead after a few day's. There is some juice, but only enough to rattle the solenoid. The truck doesn't have an alarm system or any other goodies, so that's not an issue either. The radio will come back on when the ignition is turned on unless it's physically turned off, but should that be an issue of current draw when the ignition is off? I'll do the mili-amp check tomorrow, and plan on having both batteries load tested, just to be sure. Thank's guy's for the quick response.