i even heard some little voice telling me apple had TWO os updates regarding crappy battery life, call me crazy - for hearing voices, sure, but still - if your blackberry has crappy battery life, strong chance it is user error
even in 2011, with all the amazing progress in processor power, mobile in general, etc... batteries remain the weak point in all wireless tech, there is no point in the world in worrying about it, at all
My usage:
Off charger:7am
8.00-15.00: idle/light usage
15.00-around midnight: heavy/excessive usage
With my usage around midnight I am down to %10-20 by midnight.
By the way I am also running .540, my suggestion for you is that you buy a new battery and give your 9900 another chance.
This.
New battery is never a bad idea. What's wrong with carrying 2?
My schedule looks exactly like yours except inverse because I work midnights