Comment by aesch

Panasonic (as well as CATL and LG) manufactures the physical lithium-ion battery cells while Tesla assembles them into a complete battery pack. When we talk about car batteries I think people are mostly referring to the battery pack which contains a lot of IP separate from the battery cell. So the supply chain is a bit more complicated its most accurate to say that while Tesla performs some of the manufacturing itself in the US it is not fully vertically integrated.