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Message: <blockquote data-quote="winkychevelle" data-source="post: 7695615" data-attributes="member: 611804">two d3100s wont be enough and the yellow top more than likely will fail first. if you were only running 1 rockford yea you would be fine but i recommend at minimum 3 more batts about that size.dekas are cheap and they work well i personally am using datasafe in my truck right now and with the 2 130a/h batts plus my factory 60a/h batt and a 145amp alt i can run 4k with minimum voltage drop.yes my lights still dim but my voltage never goes under 14v except when the truck is in park longer than 15minutes and the truck turn the alt off.the dc alt is great i had the same alt in my 99 silverado and i didnt have a problem with running 2k with just an upgraded under hood batt.</blockquote>

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