Enpower Greentech Inc. and SoftBank Corp. have achieved a long-term strategic cooperation to jointly develop high-security, large-capacity, and high-specific-energy (Wh/kg) solid-state batteries, actively promoting the early application of solid-state batteries in the fields of IoT devices and mobile communication base stations. In the past three years of cooperation, the two companies have made a series of breakthroughs in the field of semi-solid high-specific-energy lithium metal batteries and have entered the commercial cooperation stage. The latest achievement is that the two companies have successfully developed a full-solid lithium metal battery using sulfide solid electrolyte and lithium metal anode, and produced ASSB cells at the Ah level (1-10Ah), with a measured energy density of 300 Wh/kg.