Mon - Wed: 10:00am - 6:00pmThu: 10:00am - 8:00pmFri, Sun: ClosedSat: 9:00am - 5:00pm
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.