The Std Batter is optimized to be used with Smart Hub and has 60 km of autonomy in one charge using Pedal Assist System (IPAS). The Dual Battery is optimized to be used with Power Hub and has 80 km of autonomy in one charge using IPAS. The Std Battery combined with Power Hub has 40 km of autonomy using IPAS. The Dual Battery combined with Smart Hub has 120 km of autonomy.