Shimano SM-BTR2 Di2 Battery, Internal System

$159.99 $149.99
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Shimano SM-BTR2 Di2 Battery, Internal System

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The lithium-ion battery is now available in two versions, suitable for both external and concealed internal mounting to the seatpost. A single-wire E-tube connection and new junction units for a cleaner look and easier installation. Charges internally. Seatpost Adaptor Unit is sold separate.

Shimano Di2 Batteries. Must purchase battery, charger, and power cable to complete the system.  BT-DN110A1 Internal Di2 Battery.


  • 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
  • The Shimano Di2 Internal Battery is designed to fit with internal mounts, offering a hidden solution for Shimano Di2 drivetrains
  • Li-Ion battery power

Note: Limit 1 per customer

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  • 5
    di2 Battery

    Posted by Shimano quality is always great! on 29th Dec 2020

    My original di2 battery lasted more than 7 years! While I have only just started using the replacement di2 battery, I assume it will perform just as well.