Shimano Di2 External Battery SM-BTR1

This 7.4 volt Shimano Di2 SM-BTR1 Battery Pack is a  high-performance lithium Ion battery that will keep your Di2 system powered for the distance. Proven to deliver reliable and high performance in the worst weather conditions, the rechargeable Di2 battery holds a 1000km charge, regardless of how trigger happy you are on the shifters. Mounting bracket easily adapts to all road bikes and allows Di2 battery to be removed easily for charging. 

• Proven to deliver reliable performance in all conditions
• Rechargeable Di2 battery holds a 1000km charge, even when circumstances require consistent and frequent shifting
• Lithium Ion technology is lighter, more compact and better performing than other power sources
• Mounting bracket easily adapts to all road bikes
• Battery can be removed easily for charging

Compatibiity:Shimano Dura Ace Di2 and Ultegra Di2 groups
Material:Composite
Weight:69g