They do not. We're looking into it right now. While you say there is no issue, their owners manual states otherwise...which is why we have not done it.
I have attached a pdf of that page in question. basically it says "warning, do not use auxiliary battery for start aid...blah, blah, blah, end of the world, etc, etc".
We're talking to them now about a work around.
PLEASE do not send questions via Private Message, my inbox fills up too quickly. Post questions in the forum as a new thread so that other users can benefit from the answers. Use Private Messages for sensitive information only (VIN, Contact info or things you do not want the public to see).