I'm not sure what I'm doing right, but I got the phone yesterday, plugged it in at work to fully charge it, and here are my current stats since I unplugged it:
Battery Level: 40%
Up Time: 16:28:39
Awake Time: 1:59:30
Battery Use:
- Display: 58%
- Cell Standby: 13%
- Phone Idle: 11%
- Voice Calls: 10%
- Android System: 4%
- etc...
Here's the kicker - I've been on 4G/LTE for about 15 of those 16+ hours of uptime. I live in a strong 4G area, so I don't know if that's helping or not. I also had GPS on that whole time, though nothing really using it. I also left the screen on auto-brightness.
It was relatively light use. I tested out a couple of games - never more than a minute or two each. Streamed one HQ youtube video (1+ minutes). Made a handful of short calls. Downloaded/installed a few apps. Tinkered with the theme/skins a bit, etc.
But still, based on what I've been reading, and the fact that I was on LTE practically the whole time, I'm definitely pleasantly surprised so far...