im ranging 14-16 hours on standard battery on what would be average use for me. Occasional facebook, 20-30 texts including pics, maybe 10 minutes of talk time, occasional browsing, and light gameplay. This will usually leave me in the 30%-40% area in that 9pm-11pm area. I went 12 hours yesterday with about 3 text, and 5 minues of calling. and only lost about 15% of battery life. I contribute ost of that to not returning my phone to CDMA only mode, I do not get 4g in my area, the searching for 4g signal will drain your battery.
Also is anybody turnign their phone off at night when charging? My phone stays on 24/7.