... low noise can realize as high as 80% efficiency. e-Bike Conversion Kits:1 Long working life (>10,000 hours)2 Low ... efficiency (>80%)5 High reliability.6 Low Price· The kit includes motorized wheel,motor controller,speed throttle, power break lever ... 20",24",26",700C,28" Battery24v/10Ah Lithium battery 36v/10Ah Lithium battery48v/10Ah Lithium batteryChargerAC100v-240v 2amples smart chargerUse Hour per ...