In conjunction with China’s deep sea exploration program, the institute has developed a solid lithium battery with an energy density up to 300Wh/kg which was tested during 9 dives greater than 7,000 meters, of which 6 were more than 10,000 meters, and the maximum working depth wasf 10,901 meters. Accumulated underwater working time was 134 hours, the maximum continuous operating time 20 hours.
CAS news release, March 30, 2017