The first week or so, I was getting 12-13 hours per charge with VERY limited use. I did the CDMA fix just in case. Well, over the weekend, I started getting a measly 6-7 hours and started having to take my charger to work with me this week just to be able to make it home. I was still using it very sparingly, though. It made no sense, but I even called Radio Shack on Tuesday after getting down to 20% after only 4 hours of very little use. Of course, they were not really any help. Well, fast forward to yesterday (Wednesday). I again charged it the night before, and for no known reason, I am at 22 hours with 30 percent left after taking it off the charger yesterday morning. I used it quite a bit yesterday and did not charge it last night because I was so excited to see what it would do. I have no explanation because I didn't do anything differently. But, I hope it stays this way!!!!