That article is focused on lithium ion batteries, not LiFePO4 batteries that typically go in trailers. Those requirements, including venting, are appropriate for lithium ion batteries. (View Post)
I think a simpler way would be to pull the fuse on the tow vehicle. Whether it's an after market or OEM brake control wiring, there should be a fuse for the trailer 12V wiring, and another for t… (View Post)