The MAHLE External Battery eX1 (e185) is designed for riders who want to go further or tackle the most demanding routes. The device increases the range up to 60 km. The External Battery eX1 is the only additional battery compatible with all eBikes equipped with the XS, X20 and X30 Systems. The External Battery eX1 provides extra range for your battery with minimal additional weight. With the addition of this new external battery, you are going to be able to take your bike adventures to the next level. Battery mounts in place of a water bottle when needed, and it&';s holder will double as a standard bottle cage when the battery is not needed Lightweight at 1.1kg Charges to 80% capacity in under an hour Compatible with the X20, X30 and SX systems Purchase battery cable separately