Location services are definitely causing some excess battery drain for some reason. I've had the phone since last Tuesday, and I've kept it on LTE with all location services on the whole time. Battery life has been great, it makes it through the day with plenty to spare. Except last night... I left it on while charging over night, like usual, and after 6 hours it had only charged from 15% to about 65%. After I turned the screen on for a few minutes, while still plugged in, it dropped down to 63%. At that point I turned it off and it almost got to 100% before I had to leave for work. About 30 minutes later I arrived at work (I was driving so I didn't use it at all), and it had already lost 10%. The only unusual item in my battery usage was Google Services, so I turned off location services and the excessive drain has stopped.