I have been running 10 apps in multitasking... Pandora playing music with the screen on Full brightness and leaving the pandora screen up at all times for about 2 hours with location services on, push at every 15 minutes, and anything else I can have on and runnig.... keep in mind I have been using this thing non stop almost since 3:00 today when it arrived and its now 1 in the morning.... that's 10 hours of use with almost 2 hours of HARD major use and I'm still at 19%
Man I couldn't ask for a better battery... I am trying to drain it dry before I go to bed so I can have a full charge tomorrow... Plus its good to do a FULL charge then drain of your battery the first few times to help with the calibration.
The battery in my opinion is AMAZING !!!