I bought this phone at the beginning of the summer and all of a sudden during August the battery started draining faster when the display is on. Considering that I used to put the resolution on max and augmented brightness back when the battery was behaving normally, I can't say that doing those things are causing it to drain faster because I don't use those settings anymore and it is still draing fast and it is inconsistent with what the phone says it is draining the battery. This happens only when I use the display. I could play music from Spotify and blast it from a Bluetooth speaker for hours and the battery behaves normally. The phone also keeps telling me that I have a lot of hours left of battery life, but 1% battery drain takes away like 20 or 10 minutes.