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Shimano Di2 Battery SM-BTR1

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Shimano Di2 Battery SM-BTR1

The lithium-ion battery is for both external mounting at the frame.


  • External Battery
  • Extremely reliable
  • Easy mounting
  • High-power lithium-ion battery
  • Long battery life (up to 1.600 km when fully charged)
  • The charging time for completely discharged battery is just 90 minutes
  • With recycling marking
  • Compatible with charger SM-BCR1

Product features

  • Model: SM-BTR1
  • Battery: Lithium Ion
  • Nominal capacity: 500mAh 3.7Wh
  • Operating temperature range:
    • During discharge: -10°C bis 50°C
    • During charging: 0°C bis 45°C
  • Nominal voltage: 7.4V


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  • Alfine Di2
  • XTR Di2 M9050
  • XT Di2 M8050


  • 71g

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