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by itself without use?

no. Try calibrating if you have not done already, or take it back the Apple Store.
 
Id definitely try calibrating the batter first if u haven't done so. If you have then Id take it to the Apple store..
 
calibrate first, if that doesnt help, call applecare or take it to the apple store.
 
is it sleeping?
the battery uses power to keep the ram active...
 
is it sleeping?
the battery uses power to keep the ram active...

Exactly what i was thinking! When mine sleeps it uses battery life and i notice that if it sleeps for about 4-5 days i run out of juice. (let me know if this isn't normal)
 
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