I've always been struck by how Panasonic hasn't been able to sign up any other EV manufacturer to use their cells. LG seems the company that is signing up everyone else. One big difference is that Panasonic makes small cells, while the others all make those large pouch cells favored by the rest of the car industry. I wonder if the real reason Tesla allowed others to use their patents was pressure from Panasonic. Tesla had patents on the battery pack itself which might have been preventing others from using Panasonic's cells.