Just to give you an idea of whats out there for the taking. Here is a multi device battery powered tool kit for about $200 that has everything you might need to take care of business around the house.
http://www.amazon.com/Factory-Recond...d=3AD3ST8PPUWM
A flashlight, a sawzall, a circular saw, a drill, two Lipo batteries, and a charger for $200. You can not beat that, and reliability is very good. Acquiring two replacement Lipo batteries alone are selling for just under $200. So deals are out there if you search for them. And on certain days you can find these same kits on sale for 20-30% off.