I had a similar problem when I first started using it during the testing. I found I could just barely get a full battery use in a day, sometimes more. (I still charge at the gate) We are use to referencing the paper plate and looking away so I found that the screen was being left on when not necessarily needed. I made an effort to shut the screen off more often and that has helped quite a bit. Screen brightness and leaving the screen on have the biggest effect on battery life. (Even if it's set to sleep in a minute or two)