Your tow vehicle is not considered to be a primary charging source for your batteries, and it doesn't matter what type of battery you are using, no harm to your vehicle alternator or your rigs batteries should happen. The hot wire in the trailer connection will not change what amperage will reach the trailer.
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Bob & Becky
2012 3402RL
2012 Chevy 2500HD D/A CC 4WD
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