I have an iPad 2 which has been wonderful for the past 3 months I own it. I have a smart cover on it. This morning I woke up to find the battery fully drained. The smart cover was on it like always. It's like the sleep mode wasn't working. I also noticed after I fully charged it today that the viewing screen kept putting the images upside down, which I fixed by turning the iPad around several times. This never happened before either. I would appreciate any input. What could cause the battery to drain to zero with the smart cover on it overnight? Sleep mode with the smart cover on it has always worked great before. For the record, I have auto lock on "never". Another query: I have never heard the keyboard before when I type, yet now I hear the keys clacking.