setting powersave bias is POINTLESS, this combined with a high up threshold simply means you rarely hit the top frequency which for most of you is ~700-750 MHz. So you are using your N900 more or less at 600MHz most of the time which happens to have the best speed/voltage tradeoff. Apply a little thought. Set max speed to 805, use an up threshold of 93, enable SR, remove all frequencies except 250, 500, 650,805. Keep HW wake ups below 500 when the device is at rest. There is you magic battery saving right there. Magic super mega script, pff. Smoke and mirrors broo.