4 scenarios for u :-

1) i surf alot with iphone. About 5hours of surfing
2) if alot of calls (as im a sales), can use 1 full day (w/o wifi, bluetooth)
3) (with bluetooth) about 12-16hours depending on no. of calls.
4) i estimated standby time with less calls about 2days no problem.

Hey, i saw alot of BossPref at installer. How does this work? If disable Wifi, can we on back using BossPref? i told usually at Settings>Wifi already turn off ma. So how it eat up the batt?