I recently purchased a Verizon LG G4 off of eBay. Loving the phone. However, I am having a serious issue with the battery life. With actual screen on use, from full to dead, I can get about 2 and a half hours; Lower than normal, but I was doing some slightly more intensive stuff (QHD YouTube streaming, Tumblr, some gaming). However. There is something very wrong with the standby time. From 100 percent at 1:20 in the morning to 72 percent at 5:50. It often drops over 40 percent overnight, and once in my pocket, it lost 12 percent in ONE HOUR. This is with everything in the background closed, and the phone just lying there. I figure that the battery is actually perfectly fine, there's just something that's constantly using it up (or its keeping android from going to sleep; screenshots below). Worth noting is that I do not have a Sim card installed (as evident in the top right of the screenshots). In addition, I leave Bluetooth of when I don't use it, don't even have mobile data, always keep everything closed, keep my brightness low, manage apps to only refresh when I open them... I'm a fairly frugal battery user. I've gone into every setting I could find, disabling things like always scan for WiFi, all location services, etc. The only thing I could guess is that somehow the lack of a Sim card is destroying it. Maybe it's constantly checking? I've read through a lot of G4 battery threads already, and I've gone into the nitpicky stuff. I don't think this is a traditional issue. That's all the info I can think of right now. I've had this phone for less than a week. Any help would be appreciated, I'm going to try a factory reset soon and hope that fixes it (which I doubt it will). Should I just buy a Sim card and not use it?