First day I had it it sat on the charger (in the car all day). I had GPS and music streaming over bluetooth and it still died by the end of the day. This leads me to conclude that I was drawing more power than I was receiving. Granted it was plugged into a USB port in our ford Fiesta, I will try the standard car adapter next and see if that does the trick. Still, that's pretty good considering the phone was only at about 30% charge when I opened it.
The following day I felt the battery was horrible. I got about 5 hours usage out of it before I got the "critical" notification.
Today has been really good. Granted I haven't been using it as much, but I am at over 75% battery and it has been off the charger for a good seven hours, one hour usage on it.
Most of eastern Mass seems to have LTE, and I have it in my house too, so it has been on most of the time. Can't complain really. If there are battery issues I don't feel that is due to LTE.