My phone is a launch day version, all stock. In the first weeks of use, I was pretty easily able to reach ~ 22hr standby time and 3.5 hour screen-on time on 1 charge (100%-1%). Fast forward to today... with the same usage patterns and standby time, I can only reach about 2.5 hour screen-on time.
My usage patterns have been the same. And nothing has changed on my phone since day 1, other than updating to KitKat 4.4.2 and all those app updates. (I also have the updated v4.1 Google Play Services that was just recently released).
Anyone have a similar experience? Or is it just my battery that's degrading fast?