I have an LG Spectrum 2 with Verizon and a few months ago my battery started dying very quickly after a system update. I have looked through a lot of forums and tried a number of the suggestions that I found, but it's still happening. When I check my battery usage, it usually shows that Android OS uses 50%+ of the battery. One day, when I hardly used my phone and the battery died in the evening, it shows 11% of the battery drain was the screen and 71% was Android OS.
BetterBatteryStats indicates that the phone is not sleeping, but I can
BetterBatteryStats indicates that the phone is not sleeping, but I can