BlueMoonRising, on 06 February 2013 - 12:04 PM, said:
Not if it's powered off, leave it in sleep mode. There's no reason to power it off anyway since in deep sleep it uses very little power indeed, but can still receive calls and texts.
That assumes you have no background process running. On the stock ROM, Social Gallery has the unfortunate tendency to suck your battery dry during just one night. Facebook can do that, too, or some games. Unfortunately, Android still has not solved this problem, although at least Android 4.2 has some reasonable tools to find out what is going on.