Hi Kikker 1959, it is important to get the wording right. They may supply Tesla not will. And they could supply 90T of lithium not will. Maybe subtle difference but an important one in the eyes of an investor.
https://www.google.com.au/amp/s/www.yahoo.com/amphtml/finance/news/berkshires-lithium-venture-may-supply-185043290.html
cheers