Well i can tell you, i couldn't get a day out of the device at all when i had 1.1 uk firmware, but flashing both the firmware and memory completely blank, and installing some essentials to use the n900 for a day, well i can say that im very suprised at how well the device has done hehe.

I may try a multi-task clog up after and see how well the battery does for tonight (And im talking 20-30 apps) oooohhhh yeaaaaahhh.

Also i did use USB to charge it, i dont know if the slow charge has impacted battery performance at all?