Big Iron wrote: > I'm about to instal dual Optima yellow top batteries in my sweet young > bride's 06 Rubicon > (Kate). > > My question is, do I run them paralell or do I seperate them out, > using a charging system > isolator, running the jeep on one battery and the accessories on the > other? Always use an isolator. It's safer. http://www.4wheeloffroad.com/techarticles/dual_batteries_backup_battery/index.html http://www.wranglernw.com/ShowCategory.aspx?categoryid=790 -- DougW