Currie Technologies Hybrid Electric Bike - IZIP E3 Vibe Bicycle - LS - Lithium Ion Real Transportation at Speeds up to 15 mph/ 24 km/h and Range up to 15 - 20 Miles / 24 - 32 km with Normal Pedaling (Rider Weight, Rider Input and Terrain Contingent) Upright Position with Comfortable Saddle for Rider Ease 4V10Ah 240Wh Sealed Lead Acid RMB Battery Pack is Quickly Removable from Rack to Allow Charging Anywhere. Easily Add an Optional Second Battery Pack to Double the Range. Also available with K2 LiFePo4 battery pack and charger as an added option. Twist and Go (TAG) + Pedal Assist System (PAS) for Added Versatility