Cords on the chargers are 6ft long so you will probably need 1 or 2 of these
http://www.basspro.com/webapp/wcs/st...003000_200-3-4
You probably could make them just be sure to use heavy enough wire (14 gauga I think is what they use).
The charger stays hooked up to the batteries all the time. Just plug it in when you get back from fishing and forget it until time to go again. I wouldn't be with out one. I also use one of these http://www.basspro.com/webapp/wcs/st...L&cmid=PP_P1_2 but its not really needed, just a convience.
Fair Winds and Following Seas
Bill H. PTC USN Ret
Chesapeake, Va