Hi, I'm relatively new to the Nexus 7 and was just wondering if my battery usage is normal. I have the brightness set pretty low, roughly 10-20%, and about the only thing I've done is read comics on websites and browsing. With 16% battery left, my screen on time is only 5h 50m. I read the tablet can get 9hr out of it of actual use so I'm wondering why mine seems to be draining faster than their quoted time? Also I turned off all the sync features, bluetooth, gps, nfc, and have wifi set to be on only during wake.