Shimano Di2 battery too small for round seatpost : r/bikewrench

21 Cool New Bike Tools For 2022 - Pinkbike

21 Cool New Bike Tools For 2022 - Pinkbike

Bicycling Catalog - Red Raven

Shimano Di2 Seatpost Battery Holder

Receiving Your New Ribble Bike

Bicicleta Nukeproof Megawatt 297 Elite E-Bike Bullet Grey

Bicycling Catalog - Red Raven

Specialized Aethos/Roubaix/Tarmac Di2 Battery Seatpost Mount - Performance Bicycle

A shorter post and Di2 battery (Cutting Carbon)

BMC Internal battery adapter Shimano Di2 for seatpost with foam core - 212500

Bicycling Catalog - Red Raven