I know many factors contribute, but let's post some benchmarking in this thread to see how Battery consumption is on the 650...

Yesterday I went from 100 percent charge to roughly 27 percent by the end of the day

I have my Versamail checking 2 email accounts every 5 minutes.
I spent maybe 20 minutes talking on the phone
I spent about 20 or so minutes entering contacts via the 650
Played with the camera for roughly 5 minutes total
Web browsed appx 20-30 total minutes