With everything on and using the phone heavily throughout the day, Im lucky to get 8 hours (which Im well happy with, considering its completely replaced carrying a lappy arround). This is fairly normal battery drain, it really depends what you are using/doing thoughout the day. For eg, in offline mode (radios off), I get days of battery life. Another thing which Ive found heavily affects battery drain is proximity to cell towers and wifi access points. Low signal strength will increase battery drain, as the radio transmits at higher power levels to maintain communications.