In the past, some OEM's group stats together and throw them under Android OS in battery stats. For example, my brother's G2 shows Google Services as being higher than Android OS. Most of our Android OS usage on the Maxx should rather be under Google Services, but that is just how it is displayed. It may or may not be fixed in the next update. One of the updates for the GN fixed it. I don't think that there is anything that we can do to reduce this from taking up most of the battery besides use our phone less. But, the main reason why I bought the Maxx and love it is that I have the battery life to sync everything that I want to and have GPS, Bluetooth, and WiFi on all the time.