I am in the process of installing a 2nd battery for my amps and air ride. I was just wondering how many of you are running second batteries? If you are...are u running an isolater as well? My main battery is an Optima Yellow top and my secondary battery is a Stinger. I've already ran 1ga wire from the main to the secondary (not hooked up yet) and i am getting mixed reviews about this isolater crap....put one on, or do i even need one? Thanks for the help!