Panasonic just agreed to sell
Panasonic just agreed to sell Tesla an additional 1.8 Billion batteries over the next four years.
Then Panasonic and Sumitomo Heavy Industries subsidiary Sumitomo Mining Co LTD of Japan have agreed to expand mining operations and battery production capacity to sell even more batteries to Tesla in four years time.
If the batteries do not spontaneously combust I don't see how Panasonic can be held liable.