http://www.umc-j1772.com/index.php?route=product/product&pro...
When I sold my Leaf and moved across the country I gave mine to a guy charging his Leaf near a supercharger. He was so excited
You need a Tesla to CCS2, and then a CCS2 back to Tesla. I've only seen videos of this, haven't had the opportunity to test myself.
Makes me wonder what could be done to trick it into charging another EV for free.