... Pupular Electric bicycle with EN15194 1) 250W motor 2) Lithium battery,36V/10Ah 3) Alloy frame 4) Japan 6-gear derailleur ... best motor in China, high efficiency and durable)Battery of electric bicyclelithium, 36V / 10AhDerailleur of electric bicycleMade-in-Japan, Shimano, outer 6 ... motor, lock, 36V/9Ah Samsung li-ion battery, 36V/9Ah Panasonic li-ion battery, quick-release handle bar, front disk brake ...