I got over 40 hours on my last charge with moderate use. I am rooted, but not unlocked. I use a battery saver mode, which switches off data after 15 min.
What did you used to calibrate?
I'm currently at 31hrs and my battery is at 46%. Moderate use, not rooted and not using battery saver mode. The only thing we've changed is going from Cox Internet to FIOS, so maybe the change in internet/router has caused this extended battery life??? I usually get about 14 ~ 16hrs before charging at night.