My battery seems to indicate a rather fast discharge, but that might be a calibration issue. Once when the batter charge indicator showed appx. 90% full I got the black screen of death stating the battery was completely discharged. I merely cycled the power switch and it turned back on and again showed 90% charged.

I'm also having a lot of WiFi issues. So either the firmware for WiFi and battery need updating, or worse I might have hardware problems. I'm beginning to get concerned.