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Shimano Di2 SM-BTR1 External Battery

The standard power unit of battery that brings the Dura-Ace Di2 and Ultegra Di2 systems to life. The lithium Ion battery is housed in a waterproof (and bombproof) case that can withstand abuse from the daily rigors of cycling. One full charge can last for many, many miles.


  • Bombproof case
  • Reliable Lithium Ion battery
  • Works on all Di2 systems
  • Shimano Part# SM-BTR1

All Di2 components on the bicycle require the same firmware version. Using Di2 components with different firmware versions may cause malfunctions.

Sale Price
Reg Price $69.95
Item is in stock


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