Considering the switch; question about iPhone 5 battery life

I'm considering switching from a Galaxy Nexus to an iPhone 5. Politics aside--I'm pretty platform agnostic, having owned a device on every platform--I was wondering about the battery life. I shoot television, which means that I'm standing around waiting 6-7 hours a day to be on camera. This means that I'm generally on my phone, reviewing my scripts, on Reddit, or gaming. Does the iPhone 5 have enough juice for 6-7 hours of 3D gaming? Or would it be prudent to stick to browsing and lighter games? I've read conflicting reports on other forums, so I was wondering for some direct input.

Note: I don't actually intend to play 3D games for 6-7 hours, more curious as to what the upper limits of battery usage is like.