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Message: <blockquote data-quote="Villeza1" data-source="post: 6685247" data-attributes="member: 608393">Okay, with it's individual power line from the alt and iso inbetween, when the system is on it will still drain from the front batt due to the fact that they share the same alt. You'd have to get a second alt to run just the vehicle's electrical. But you dont need to do that. It's more efficient to run a power/ground wire from the from batt to the back batt. Aslo grounding the back batt will help as well. You can ground the amp to the batt. BUT...In your case, you dont even need a second battery. All you need to do is upgrade your stock batt and do the big 3. No need for a second battery.</blockquote>

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