I am amazed. I've getting 6 - 8 hours of "usage" time along with the standby being 17-20 hours. No other iPhone has done nearly this well. I'm running auto brightness... sitting usually around 50%. I run with location services, bluetooth and wifi on all the time. Here's the usage for today as well as the other night. I've also noticed that my passbook is activating location services every time I unlock my phone... it hasn't hit the battery like I thought it would. Now... all this being said... I still wish Apple would heavily focus on improving battery life. It shouldn't even be a concern, but it always is. I'm just glad that it's not worse than my 4S!