battery problem
It should now show how much amperage your car is leaking. Some leakage is normal (to keep the PCM&BCM alive, etc), but it should only be a few hundred milli-amps.
If it's more than that, remove the fuses from your fuse-boxes one at a time until you find what is leaking current. This should give you a better indication of where to look for wires with poor insulation, etc.
However, if your car simply isn't leaking current, it might as well be your alternator going bad, leading to it not charging the battery enough.
AutoZone does free checks of alternators. Don't know if they need you to take if out of the car to chech it or not.

