I saw that Wal-mart had 12 volt Coleman refridgerator/coolers on sale. I was thinking that this would be a cheap way to add refridgeration to my boat but I am wondering what the draw on the batteries would be. I also considered adding another 12 V battery in another location and using that battery solely for the refridgerator (that would tie me to a dock every few days to charge that battery. I would be scared to run it to my house battery because I am not sure what the drain would be (thought it would be nice because it would charge by the engine).Does anyone have experience with this? Any thoughts or suggestions would be greatly appreciated.