It really depends on how much you have the screen on, if you're using heavy, especially the camera and/or Web Browser, the battery will go down quicker. I've had no issues with battery life yet with my DNA, I have WiFi off when not needed, Screen about 25% (The brighter the screen, battery life will probably decrease as well), I do leave the GPS on, it really has no effect. There are days that I can get to 16-20 hours, lately, its been 40-60 hours (Yes, 40-60 hours or 2 days). I'm also not rooted as well