I'm new to Android specifically and smartphones in general, but why does the iPhone seem to get such better battery life? Compared with a coworker (iPhone user) today, and after maybe 8 hours or so I was at maybe 30% and he was at 70%. Roughly the same usage, he may have used his more. I'm still tweaking settings, so no doubt that's a factor, but I've seen people say that the iP isn't doing as much or that the Android uses more power because it's a more complicated and better machine. What does this mean? What is the Android doing so significantly better than the iP that accounts for such a drastic difference in battery life?