correct me if im wrong

[Calikid 5,000+ posts]

to connect dual batteries i hook up both + terminals and ground the - terminals right.

ps: sorry if this has been answered 14593943 times. just making sure.

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[draarong2004 10+ year member]

eh, yea.....but its recomended if your gonna run your stereo while the car is off, to have a isolator, so the car still starts.....