BYD Stakes Growth on Batteries, Charging With China Sales Slowing

China’s BYD Co. unveiled more powerful batteries and faster charging capabilities, along with refreshed and new models, as the world’s largest electric-car maker seeks to reverse a deepening sales slump in its home market.

Among a suite of tech upgrades, BYD launched its latest generation of so-called “blade batteries” and ultra-fast flash charging architecture in Shenzhen on Thursday. The technology is capable of refilling the newest batteries from 10% to 70% in five minutes, and close to fully charged in nine minutes.