KETELES KF9 1000W 17.5Ah 20‘’ Folding Electric Bicycle. The KF9 1000W comes with a high-performance motor that generates an impressive 72 Nm of torque, offering a powerful, smooth, and efficient riding experience. Equipped with a 48V 18Ah removable battery, it delivers reliable power for longer rides. It features a foldable frame and Shimano 7-speed drivetrain.