my daily use
on stock rom KK1, rooted, some bloatwares are frozen in Titanium backup
screen auto brightness
3-3.5 hrs screen on time, mostly for internet data streaming app, like XDA, Gearslutz, FML, Engadget, IGN, youtube , internet browser
3G always on(HSPA+ 21mbs)
30 - 60mins phone call
2 - 3 hours music.
LOADS of whatsapp texting
some emails from gmail app
some facebook checking
syncing are ALL on, (google, whatsapp, facebook)
my phone battery go from 100 to 0 % in around 11 to 12 hours.