I apologize if this has been discussed already - I searched and did not find anything about this yet. I was noticing that the battery on the n900, the BL-5J 1320mAh, appears to be a step down from the BP-4L battery in the n810, which has 1500mAh. My n810's battery was always dying, so I'm concerned about all day usage of the n900. I'm hoping that the n900 will use power more efficiently or something. I read that the new TI OMAP 3430 processor speed steps, so that could be an example of how a smaller batter can last longer... Anyone have any thoughts on this?