I am finding mine very much like Android tablets I have used (Touchpad and Transformer Prime). Battery lasts ages for web browsing only, but very few hours if you play games on it. I don't think any of the games I have even render at the native resolution but battery seemed to die fast (although I never play it in long enough sessions for it to really bother me, but I appreciate others might).
Burnout Crash and TowerMadnessHD (especially) seemed to take a lot out of it. 20%-25% in less than 1 hour. Mine is normally on full brightness, but I don't see the point in running it any less. It's not as "blinding" at full brightness as people mention (if anything I think my SGS2 is brighter on full). Plus, it's not that viewable in sunlight unless it is at 100% brightness and even then it is not as great as I thought it would be.
rp2000