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Shimano Di2 Battery Holder for 30.9-31.6mm Seatpost – Incycle Bicycles
![Universal Cycles -- Ritchey Di2 Seatpost Battery Mount [41003817003, 41003817004, 41003817002]](https://www.universalcycles.com/images/products/medium/67900.jpg "Universal Cycles -- Ritchey Di2 Seatpost Battery Mount [41003817003, 41003817004, 41003817002]")
Universal Cycles -- Ritchey Di2 Seatpost Battery Mount [41003817003, 41003817004, 41003817002]
Shimano PRO Di2 Battery Holder 31.6mm Seatpost Di2 Built-in Battery Mounting Bracket For Seat Rail Mounting - AliExpress
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