I have owned the 3Gs, 4, 5, and 5s. This one is by far the worst. I average 4 hours of usage. 4 1/2 on a very good day. My main apps are Safari, browsing Facebook/Insta, Bleacher Report, and very little texting or calling. I have my mail set to fetch at a low frequency, turned off every setting that could effect things. Don't even have background app refresh on. I keep my brightness at around 40-50%. No widgets. No bluetooth. I don't play any games or stream much. Only use Maps every now and then. Not jailbroken. Little to no music usage. The ONLY culprit I can think of is low cell and wifi signal 90% of the time, but would this really cause me to lose HOURS of usage? At a minimum, I should be getting 6 hours of usage with the light tasks I use. Does this really shave off a full 2 hours or more? It floats between 1-2 bars of LTE (same for 4g) and Wifi is anywhere from full bars to cutting in and out throughout the day. Maybe it is a combo of this iOS 8 mess and low signal? I even put a new battery in recently as that was the cure for my aging 5, but it barely helped at all here. It is beyond frustrating having to charge my phone multiple times a day.