Most wrongly think that tesla is building it’s own cells, and doing their own cell chemistry research. To be fair, Tesla press releases have been carefully worded to make it seem that way, but the reality is that Panasonic holds all the expertise, and it’s panasonic employees using panasonic equipment inside the Gigafactory making the cells. . Tesla has entered in some collaborations, but again, the experts are external to the company. Tesla does do a lot of innovative pack development and has a lab that characterizes and qualifies battery tech and gives panasonic feedback on what direction they want to go, but that is expected of every ev company.