Amount of time web browsing?
Amounts of time playing games?
Just a estimate is fine.
Do you get good reception where you're at? Reception plays a role in your battery life!
Also have you calibrated your battery? This could possibly be a battery calibration issue. I'll play some NOVA on mine just to see what my battery drain is, should be relatively close. (Evo 3D)
EDIT: Apparently I dont have NOVA installed, i'm gonna use Spiderman 3D instead. Should still be close in terms of the power it requires to play the game.