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Message: <blockquote data-quote="hispls" data-source="post: 8651596" data-attributes="member: 614752">4 gauge CCA cable is pretty sketchy.    Really anything you're going to do here is going to tax your alternator.  Figure the factory builds new cars with the absolute bare minimum they can get away with to run the factory accessories and when you flat out double that you're going to be working it hard.  Add as many batteries as you feel you need to keep your voltage where you want with the playing you do, but the alternator eventually must recharge them.   Whether the alternator dumps the current while you're playing or later to recharge the batteries it's still working harder than it would without any add-ons so expect premature failure period.Nobody uses battery isolators anymore AFAIK.  Just parallel up as many as you need to keep your voltage up above 12V and call it a day.</blockquote>

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