My 600's battery is fast to drain its charge. I left it off overnight and it went from 2 bars down to 1 bar. That's not good. Also it has drained from a full charge to 1 bar in less than a week, and that is with below normal usage (for me that is) as I've been too busy to read as much as I normally do. Is anyone else who ACTUALLY owns a 600 having this issue?