Great info. Thanks!
I dug around in my "big box o' random electrical gear" and found a 1amp USB/Car adaptor. (It was plugged into an AC->Car adaptor rated at 500ma.

) Took it out to the truck with my pass
thru and it works on a WOW cart.

That said, I'll put their 2a car adaptor and wall-adaptor on my next order. I guess I owe V4L for a pass
thru too as I reported one defective; they kindly and promptly mailed a new one.

Both work on the one USB port, and that 1a car adaptor.
Also, they sent me a couple sample carto's

with an order I placed containing a kit I put together for a friend's "after thanksgiving" present. My cursory review of the samples (maybe 10 puffs each):
CoolCart Dunhall - nice, pleasantly acrid. tingly tongue. earthy clay aroma. (4/5 stars)
CoolCart RY4 - bland, like a weak Virginia CoolCart. reminds me of wonderbread toast. too many others I adore! (3/5 stars)