I have also noticed that my battery percentage skips around. Today, I was reading articles and checking Facebook/Twitter on my phone for a 1 hour train ride. When I got in, my battery was at 95%. When I got into the office and set my phone down for 30 minutes, I turned it back on and it was back to 99% battery. I am not quite sure what is causing this, but it happens often. Not a really big deal because the battery life is still absolutely incredible, but it's just odd. By the way, you should be getting was more than 5-6 hours of screen on time with this device. Last night I went to bed and my phone still had 68% juice left. It had been on for 16 hours and had 5 hours of screen time. Sorry I didn't take a screenshot, but will do so tonight if I remember.