Originally Posted by garuhhh
If your battery life drastically goes down to 3hrs, then most probably there's an app or process keeping your cpu very active. You might want to find out what that is. i think ts much simpler than downgrading your phone to 2.1
With 2.2, my battery life is a 1% decrease every hour on standby (without mobile network turned on). Based on what I had observed last night till this morning. Seems to be similar before I upgraded to 2.2.