So I got my Maxx about 4 weeks ago. Had the oringinal for about 2.5 weeks. Was getting about 18 hours on 4g and screen brightness about 75% with facebook. Thats all I do really. Games sometimes. Had an issue of what they call " Black screen of death " so they replaced it and the battery didnt seem to be nearly as good. So they replaced it. This one doesnt match up either. I am lucky to get 13 hours. Anyone else having issues? Did I get a weird device to start? And if I dont use internet that much will I notice a difference in games or facebook if I turn 4G off? Thats the only way I know to get my 18 hours back.. Any input is appreciated.