I updated to 2.0 on Sunday. On Monday it was 100% at 6:30AM and was fine all day, at 11:30PM it was down to 32%. I then charged it overnight and again at Tuesday 6:30 it was 100%. Around 11:30AM I noticed it was down to 47% which seemed strange, I'd not used it heavily. At around 1:30PM I checked it and it is completely dead, I assume the battery is fully discharged. I don't have a charging cable with me... Can't understand why the difference in battery performance between the two days.