I'm totally flummoxed by the ipad 2 battery. When I first got it I used it from 70% to 30% then charged it overnight. The next day I noticed it was only at 85% (after >10 hours of charging!). I spoke with the apple store and they suggested draining it to below 10% then recharging it again. After this conversation I drained the battery from 85%->7% and put it on the charger last night. This morning I went to check on it and it was at 67% and now 9 hours after this (almost 20 hours since originally putting it on the charger) it's only at 74%!!!! There seems to be something seriously wrong as it can't really take 11 hours to go from 7%->67% and 9 more hours to go from 67%->74%. I fear this thing will never fully charge. Does anyone have an explanation or suggestion or similar experience? Some other threads on the issue from my search: Here, here, here, here, here, here, here, here, and here.