> > Components > Shifter > Electronic Shifter Parts, Shimano > Shifter Battery > Shimano BT-R1A External Di2 Battery


BT-R1A External Di2 Battery (BA7970)

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
  • Battery weighs 71g
  • Di2 External Battery, battery charger, and power cable are universal between Dura-Ace 9070, 7970, Ultegra 6870, 6770 and Alfine Di2 systems
Item Specifications
Shifter/Derailleur CompatibilityDura-Ace 7970 Di2
Shifter/Derailleur CompatibilityDura-Ace 9070 Di2
Shifter/Derailleur CompatibilityShimano Ultegra Di2