Check out
http://www.fromeco.org/ . I have been converting all mine to the LiFe 2 cell batteries. And on most of my models I only run one battery now. One 2300mah 2cell keeps me going all day with reserve. And they will make the plugs how ever you want them. I usually get two standard FUT/JR type plugs, one for ign and one for Rx. Both run through a separate switch.