RITCHEY DI2 BATTERY RUBBER MOUNT/NORMAL

The Ritchey Di2 Internal Battery Seatpost Mount is a simple, protective elastomeric sleeve designed to house a Shimano cylindrical internal battery inside a round bike seatpost. It functions via a strict friction fit. The rubber compresses so you can push it into the post, then expands to lock against the inner walls to stop battery rattle over rough terrain.