The RS Range Extender gives you another 252 Wh (70%) for those extra long rides. Adding the RS Range Extender to the Rise gives a range comparable to that of a 900 Wh battery on a normal electric bike. Under typical conditions this means around 8 hours of riding and more than 4,000 m of ascent in Eco mode.CompatibilityCompatible with Rise M Models.Go FurtherOur RS Range Extender gives you another 252 Wh (70%) offering a range comparable to that of a 900 Wh battery on a normal electric bike. Under typical conditions this means around 8 hours of riding and more than 4,000 m of ascent in Eco mode.Secure MountingUsing our patent pending design, the range extender is securely held in the bottle cage. The cable from the range extender to the standard charging point fits securely and quickly and won't interfere with the pedals.FlexibleThe RS Range Extender Cage is compatible with water bottles. Our patent pending design, is the first high capacity range extender of over 250 wh, that can be re