I'm running 6.1 beta 4 so I might be cheating. I get 12 hours on each charge with about 2 hours of LTE browsing, social networks, email and uploading pictures. I used to get a day and a half running purely Wifi when I never had a data plan and my Data was permanently off. I might fully charge up one day switch my cellular data off and see if the battery life improves.
Pretty bad, yesterday I left my hotel room at around 1pm and had my phone on 3g all afternoon played a few games, surfed the web and checked a few e-mails. By the time we left and got to the restaurant at 8pm my phone was dead.
You need a battery calibration. Charge the phone till it turns on then unplug it, run a flashlight app (or something that drains it fast) then charge it to 100. Do not disconnect the phone until its at 100% and the plug Icon is on the battery. You should be good to go after that.
updated to 6.1 on release day, charged up & have been running on that charge since. I'm very happy with my battery life - seems to be the same or maybe a smidgen better than 6.0.1 for me. I'll let this cycle drain till it shuts off and do a nice full un-interrupted charge😃 Attachment 25955