... Electric bicycle of 28" 1)Motor:250W 2)Battery:lithium,36V/10Ah, Frame:alloy 3)Derailleur:Japan Shimano 6~7 gears ... motor in China, high efficiency and durable)2. Battery: lithium, 36V / 10Ah3. Derailleur: Made-in-Japan, Shimano, outer 6 or 7 ... ): front light & rear light, front-drive motor, lock, 36V/9Ah Samsung li-ion battery, 36V/9Ah Panasonic li-ion battery, quick-release handle bar ...