Since buying the phone, I've primarily been in an area with an active wifi connection, and every day the trend was that my battery life would be 46 to 50 hours. The last two days I was traveling and was away from wifi almost all day. Last night I went to bed after about 17 hours with 53% battery life left, so trending to 36 hours or so. Today has been the same; 14 and a half hours off battery and I'm at 56%, so about a 32 hour trend. (I was navigating for about 30 minutes off power today while driving.)
This is fantastic. Knowing that at the worst I'll never have to worry about plugging in while I'm awake? That was the reason I wanted this phone. Everything else it can do (great speed, great display, active notifications, thinness) is gravy.