In your 11 odd hours of iPhone off the charger, you have used it for 8 hours.. Phew... I normally achieve a usage of 8 hours in 2 full days or so.. Min 40 to 45 hours roughly
I use it for work. When I'm not talking on the phone, texting, and emailing, I'm streaming music from DI Radio. This is the first iPhone that can get me through an entire work day without plugging it in. Just to get to 1% for that picture I had to AirPlay Hulu for an hour or so when I got home from work.
I'm pretty happy with this, it's such a change from my 5S that I needed to be tethered to a wall output several times a day.