My latest run is extrapolating to 28 hours on, 6 hours SOT. Mostly web stuff and facebook. Right now my wakelocks are pretty low. I'm using Greenify. I think it helps to turn the phone completely off and then back on with some regularity. I have a poor signal so that uses a lot of battery so I've forced it into 3G. But my wife is getting the Z Play on the $200 deal plus getting $300 for her LG G4 so her phone will be the battery boss in our house.