i have so far managed to stay away from overclocking. smartreflex is enabled. didn't notice a very big improvement in batterylife with smartreflex but battergraph did show a slight decrease in consumption. i generally set my phone to tablet mode during the night (I should probably script this!) and in this mode, battery consumption averages about 2-3% the whole night (which is generally around 8 hours or so). not too shabby.

does anyone here use mail for exchange?