A 2,000-metric-ton all-electric cargo ship has been launched in Guangzhou, China. Manufactured by Guangzhou Shipyard International, the 70.5m (230ft) vessel uses a 2,400kWh battery system comprised of 1,000 individual lithium-ion packs. It has an 80km (50-mile) range, a 2,200-ton cargo load and a top speed…