I was wondering how many of you guys experience your battery draining even when plugged into a wall socket, because just now I was outside and charging my iPad when I noticed that my battery was going down. I was only using two apps: iBooks and Safari, and I even had bluetooth off. I did have maximum brightness though because I was outside but that was it. Is this normal? I mean my laptop at full brightness charges within the hour even when it's almost drained...