Shimano PRO Di2 Internal Fork Steerer Battery Holder Mount SM-BTR2 - Blue Sky Cycling
Shimano BMDN100 Di2 Long Battery Mount for External Wiring - The Sports Den | Marshfield, WI
MPart Di2 Seatpost Battery Mount for seat post ID 20mm to 23mm (post size 27.2-28.6)
Di2 Battery Holder for Cannondale 25.4 Seatposts - YouTube
Internal battery options for Di2 and EPS drivetrains - BikeRadar
Di2 Accessories | Pro Bikegear
New Shimano PRO Di2 SM-BTR2 Battery Holder for Fork Steerer Includes Tool 22255446457 | eBay
Giant ISP/Vector/D-Fuse Seatpost Di2 Battery Holder - Wheel World Bike Shops - Road Bikes, Mountain Bikes, Bicycle Parts and Accessories. Parts & Bike Closeouts!
Shimano PRO Di2 Seatpost Battery Holder/Mount fits 30.9
Shimano Ultegra BMR2 Di2 Battery Holder, Black | Bikeinn
Easton Di2 Battery Holder - for 27.2mm Seatpost
Shimano BM-DN100 Battery Mount for SM-BTR1 Di2 Battery-Pack | BIKE24
PRO Seatpost Mount for Shimano Di2 Battery, 9,50 €