Treks Removable Integrated Battery System (RIB) looks great and is user-friendly: the battery is fully integrated into the frame, providing excellent protection, and can be easily removed without tools to make room for a bottle cage.;This bike broadens horizons: the top-notch Bosch system is suitable for daily commuting, recreational rides, and lots of fun on the trails;The Purion controller features a Walk Assist function and an intelligent eMTB mode that automatically delivers the required power depending on the terrain;With the external charging port, you can easily and conveniently charge the battery in the frame or when removed;