Shimano Di2 External Battery BTR1

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Shimano Di2 External Battery BTR1

Genuine Shimano SM-BTR1 replacement battery pack for Di2 electronic shifting systems. 
  • Di2 External Battery, battery charger, and power cable are universal between Dura-Ace 7970, Dura-Ace 9070, Ultegra 6770 and Alfine Di2 systems
  • Battery Only  (Charger, cable and battery mount all sold separately)