Interesting. Where are your picking up your connection from?

I have mine set on automatic: at home it connects to the wifi for several hours. At work, I'm in a place with poor reception so it is continually having to find and reconnect (even to the basic cell radio signal). Yet my batery easily lasts 12-14 hours. The only thing I have found to suck up battery is the music player (and that's not exceptional).

I do keep the email retreiving down to every half hour on wifi and only on demand on cell data. But otherwise I'm truly 'online' all the time.