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Message: <blockquote data-quote="cotjones" data-source="post: 6731467" data-attributes="member: 573988">Noted: Cliffs...When 2 charged sources are unequal current will flow from the higher charge to the lower charge until they are relatively equal charge. So If you hook up an expensive battery in line with a stock one, overnight the stock battery will discharge the expensive one to the same level as the stock.Another problem is that if you play your music with your engine not running your audio system can drain every ounce of power until your car won't start.An isolator fixes both of these problems by separating your car's ignition charging system with it's Audio charging system</blockquote>

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