Yep - really based on user profiles. I never expected too much in terms of battery life with the standard battery - when they come out with a good extended it would probably get me 2/3's of the day - possibly all day on a light day. It could also have some to do with signal strength since my bars are quite low where I have been using/testing the I910.

Should have another standard battery Today - and that will get me much further into the DAY!