I've had my Nook Color since February. I read a couple of books and the battery was fine. Then towards the end of April, I stopped using it to read, since I was reading a regular book for about two weeks. I used it to check my e-mail a couple times a day, but always turned the Wifi back off. The battery was fine. Then a couple of days ago, I borrowed a library book on it and started using it to read again. Now the battery won't stay charged. I'll read for a little while and then put it to sleep. When I pick it back up a little while later and read for like a minute, the battery will go from 86% down to 44% in a second. The only change I made was finally getting a cover for it. Anyone else experience anything like this?