ENVE's Shimano Di2 Battery Grommet is a must-have accessory, allowing seamless integration of a Shimano Di2 seatpost battery within your ENVE seatpost. This clever grommet ensures a secure and noise-free fit, preventing battery movement over rough terrain. Say goodbye to noise and potential damage caused by a jostling battery inside the frame. With this quick and simple upgrade, ENVE provides a solution that eliminates the need for zip ties or electrical tape. Keep your battery protected from the elements while enhancing your riding experience.