Hong Kong CNN  —  China’s Contemporary Amperex Technology (CATL), the world’s largest producer of electric vehicle batteries, has unveiled an upgraded battery it says promises an even longer range than rival BYD’s cutting-edge technology . Both tech giants now boast they have batteries that can charge EVs in as little as five minutes. But on Monday, CATL upped the ante by announcing that its new Shenxing battery has a range of 320 miles, about 70 miles longer than BYD’s stated range of 250