https://www.cnbc.com/2019/06/26/tesla-secret-lab-building-battery-cells-to-reduce-panasonic-dependency.html #tsla
Tesla has a secret lab trying to build its own battery cells to reduce dependence on Panasonic
Tesla is working on new battery cell designs, and a way to make their own cells, with R&D teams in a lab near its car plant in Fremont, California.