I have driven 13 hours on one battery with it being charged from the truck (no mods) and the battery stayed up and the res refer was fine.
I would think you have some other issue going on.
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Mocha, one-eyed toothless, hurricane survivor, Pirate dog
2019 20th Anniversary Edition 3701LK
B&W 20K for Ford OEM Puck
2018 Ford F-350 Lariat CCLB PSD DRW KJ5CQH
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