48V Lithium Battery 500W Motor 27 Speed Alloy Electric Bicycle 26″ Oil Disc Brakes 48V Lithium Battery 500W Motor 27 Speed Alloy Electric Bicycle 26″ Oil Disc Brakes Electric Bike MTB Mountain Bike Electric system: Motor: 350/500W Rear HUB Brushless Motor Battery: 48V 12/15/20AH Lithium Battery Charger:48V 2A Throttle...