Shimano BT-R1A External Di2 Battery Width-210 Features a new faded edge

Features a new faded edge on the clamp face to help avoid hot spots and stress risers when your bar flexes under load

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Shimano BT-R1A External Di2 Battery Width-210 Features a new faded edgeShimano BT R1A External Di2 Battery. Shimano Di2 Batteries. Must purchase battery charger and power cable to complete the system. All Di2 components on the bicycle require the same firmware version. Using Di2 components with different firmware versions may cause malfunctions Use Di2 system checker to update component firmware from http: e tubeproject. shimano. com TECH SPECS Shifter Derailleur Compatibility Dura Ace 7970 Di2 Shifter Derailleur