The Zehus all-in-one motorhub has a capacity of 250 watts and includes a 30V Li-ion, 176 Wh battery. It has a maximum capacity of 40 Newtonmeters (Nm). The motor assists you up to 25km/h and the amount of support depends on the setting you choose. For more detailed information see also the other Q&A's on support and the battery, or use the Zehus manual. You can find it here.