Battery keeps draining f

[Mykayla0721]

I have a 2008 sport trac. My battery has been load tested and is perfect. However my battery dies within a couple of hours, the alternator is fine. It dies from just sitting there. We did notice that the radio keeps flashing on and off. I need help? Thabks

 

[floater180]

a buddy of mine had same thing on his mustang and it turned out to be the radio had a short that kept on changing discs, with no key on, until the battery was dead. good place to start!

 

[GreenMando]

I had a battery problem since I bought the truck new. Apparently the dealer had swapped out the battery for one too small for the truck. A new battery at proper size a few months ago solved a long problem.