If you want a power supply for the home, I have this one from Dick Smith mounted to my pier and plugged into the mains. From it, I run my EQ6 and Orion Starshoot astrocam. It has the banana plug fittings and also a cig. lighter outlet. You can buy a double lighter cord to run more than one device as I have for both the mount and camera.
http://www.dse.com.au/cgi-bin/dse.st...uct/View/Q1755
Hope it helps.
Baz.