I saw a neat contraption today, Not sure where to get it the guy said he bought it in canada. Its a battery box that sits in your cargo area and a 12 volt battery tender that plugs into your 12 volt cigarette or powerpoint and tends the battery that is in the box. I guess you can call it an alternative to the dual battery setup, but looked alot simpler and can be removed if need be. It also keeps your engine compartment free, anyone have one?