TOKYO -- Panasonic unveiled a more advanced prototype battery that has five times the storage capacity of current ones, with the company's battery chief saying it will help deepen business ties with U.S. electric-car maker Tesla.
TOKYO -- Panasonic unveiled a more advanced prototype battery that has five times the storage capacity of current ones, with the company's battery chief saying it will help deepen business ties with U.S. electric-car maker Tesla.