Mon - Fri: 10:30am - 6:00pmSat: 10:00am - 6:00pmSun: 12:00pm - 4:00pm
3T's Battery Holder holds a Shimano Di2 seat tube battery(Shimano SM-BTR2) inside your seat post, enabling easy fitting and removal of the battery. It is compatible only with 31.6 diameter seatposts.