I just got the jeep and it has factory battery that's 2 years old,was going to run on jeep battery during the day and I am bringing my optima grp 27 yellow top to run it during the night. I don't want to haul it in and out of the hotel room. just drinks till we go home so if it turns off just warm drinks. just don't want my jeep to be dead while I am out hunting and its time to go home.i will try the linc the one I went to earliar had a password