I am not loving the battery life on the iP6. Maybe i expected too much. I wanted a phone where i did not have to charge every night, but that is exactly what the iP6 is. I have absolutely no idea how ppl are lasting more than one day, unless one of those days is mainly on standby.
With LTE, I am lucky to get much more than 5 hours. All i do is browse forums and check twitter. Nothing intensive. How in god's name did Apple estimate 10 hours with LTE on?
I also neutered my phone by turning off any "perks" (ie push, LTE, wifi, BT, background app refresh, location services, screen is down to 20-25%). Working on only 3G, only then did i get over 9 hours one time. But normally i would get 8. I get 8 with my iP4... and that's 4 years old.