That's the same as mine if I use auto brightness and it happens to have the screen cranked up. Or i'm at home where sprint signal is real bad. I get worried about my battery life too because it seems to eat battery as fast as a regular phone while using it, or at home, but if I just let myself not worry about the battery it actually lasts 15-22 hours depending on usage. It's so fast and easy to change the brightness since it's right in the notification curtain I may just start manually keeping it down to see what happens. I've also noticed wifi doesn't necessarily help the battery as much as other phones i've had, even in pretty poor signal areas. Turning off 4g in poor areas makes a noticeable difference though, but its kind of a PITA having to reboot it twice to turn it on/off so I usually don't. Power saving mode doesn't seem to help mine much. I think it may help a tiny bit during heavy screen on use, but it seems to actually have slightly more idle drain. At this point I just leave GPS/Wif/Bluetooth off when I don't need it and stopped worrying about the battery. It "appears" to drain quicker than most folks but if left I just let it go I end up impressed by the overall battery stats when it's time to plug it in.