I've tried different variables, like turning off GPS, turning off Bluetooth, disabling apps, uninstalling apps. I've been doing them one at a time to see if anything changes. Nothing changes it except restarting the phone. Then it randomly just starts to tank with battery life. You can see from the screenshot that when it started to tank, the screen wasn't on for a long time, so it's not like I got on my phone and started something up. It started to tank when it was idle. Also my phone has been in my house all day since I work from home, and I get solid 4g pretty much without question. So it's not fluctating signal strength. My phone was awesome when I first got it. It's only in the last week that this started. If I leave my phone unplugged at night, it'll go from 95% to 30% by the time I get up, just sitting there idle, not being used. When I first got the phone, it'd lose 6-10% over night.