I'm sure that you're probably aware but I wasn't until I watched the GZ Q&A video about charging these lithium yeti's from a vehicle. They said to only charge them with a keyed 12V source or it will drain the vehicles starting battery when the vehicle is off. I charge my AGM yeti on a 12ga wire (fused of course) direct from the battery to the rear of the vehicle then anderson power poles to GZ 8mm. This was convenient since the power poles were always hot but the yeti would stop charging when the vehicle was off and the volts dropped below 13.5V. I'm hoping GZ will come out with some sort of vehicle smart charging cable for the lithium's that will automatically disconnect the yeti when the source volts drop below 13.5V or what ever thresh hold they set.
We take the ARB50 and Yeti 400 in my wife's Acadia on vacation and the rear outlet is always hot. It will be a PITA to have to remember to unplug the Yeti lithium every time we stop.