I just switched to the LG V30 last week SPLWF, but I will say, since getting my 10 back in January, I'd noticed over the last month or two that the battery life was diminishing, and it was never really great to begin with, but still pretty good. I never factory reset mine though. I'm the same on usage as you............ I don't use many apps, and I purposely avoid using the FB and YouTube apps. I uninstall or disable them first chance I get. My cousin was tellin' me that an advantage of getting one of the newer phones with the 835 processor in them is that the 835 has some tech or features on it that really extend the long-term battery life much better than previous processors could. So the fact that the 10 has the 820 on it might have something to do with that.