Hey was wander if anyone might be able to help. Im having issue with battery drain but only after car sits for 2-3 days. AS long as I drive daily it keeps enough charge to start but if sits couple days its dead. I had optimum in front of car and 2200 kinetic in rear of car,0 gauge wire run between. kept killing batteries till they went bad so i bought two new batteries same brands front and rear also put an isolator between cause someone told me it needed it. so now only front main battery drains with car off .Ive looked at everything I know to look at and cant find anything.I have noticed that the stereo shop that installed system has a 0gauge wire ran from negative post bolted to passenger side fender. is that where it should be bolted. could it not be grounded good and cause battery to drain