https://www.reuters.com/article/panasonic-autos-batteries/panasonic-unveils-prototype-battery-for-tesla-idUSKBN2HF0CV

TOKYO (Reuters) -Panasonic unveiled on Monday 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 Inc.