Treks Removable Integrated Battery System (RIB) looks good and is user-friendly: The battery is completely integrated into the frame, providing excellent protection, easy removal without tools, and space for a water bottle holder.;This bike expands horizons: The top-of-the-line Bosch system is suitable for daily commuting, leisurely rides, and plenty 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;Thanks to the external charging port, you can conveniently charge the battery in the frame or when removed.