BYD Co. unveiled a new hybrid powertrain capable of traveling more than 2,000 kilometers (1,250 miles) without recharging or refueling, intensifying the EV transition competition with the likes of Toyota Motor Corp. and Volkswagen AG.The upgraded tech, which aims to put more distance between BYD and its rivals, will be launched in two sedans immediately that cost under 100,000 yuan ($13,800), the automaker said at an event live-streamed Tuesday evening from China....