You've probably got GPS switched on. It really eats battery. I think that battery usage screen calls all GPS usage Maps.
If you got some spare space on a screen I'd add a power control widget. There is a good one pre-installed called power control. It's a strip of five buttons that shows you certain settings that are on or off and lets you toggle them. So you can turn on GPS only when you need it.
After using Power control widget for a while I now use Dazzle which is more compact and more customisable.
I also use setting profiles lite to set up home, work, car, meeting, etc. settings.
