(250317) -- BEIJING, March 17, 2025 (Xinhua) -- This undated photo shows a drone powered by an ultra-low-temperature high-energy-density lithium battery during a flight test in Mohe, northeast China's Heilongjiang Province. The drone, developed by Chinese researchers, has successfully completed a flight test in China's northernmost city under extreme cold conditions of minus 36 degrees Celsius.
TO GO WITH "Breakthrough in ultra-low-temperature battery powers drone test in minus 36 degrees Celsius" (Dalian Institute of Chemical Physics under the Chinese Academy of Sciences/Handout via Xinhua)
