Shimano Dura-Ace / Ultegra Di2 11-Speed Battery Charger (SM-BCR2 with USB Cable)
What Is It?
The Shimano Di2 SM-BCR2 battery charger (with USB cable) is a charging and PC interface unit used for 11-speed Shimano Dura-Ace and Ultegra Di2 electronic groupsets with an internal frame battery.
It does two things:
- Charges the Di2 internal battery
- Works as a USB connection interface for E-Tube Project software (for firmware updates and system settings)
Key Features
- Charges Shimano 11-speed Di2 internal Li-ion batteries
- Connects via USB (PC, laptop, or USB wall adapter)
- Also functions as an E-Tube interface tool
- Enables firmware updates and drivetrain customization
- Simple plug-and-play connection through Di2 junction system
- LED indicators show charging/connection status
- Includes Shimano-specific cable (Di2 junction → USB adapter)
Specifications
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Model: SM-BCR2
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System Compatibility: Shimano Di2 11-speed road & MTB systems
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Battery Compatibility: Internal Di2 batteries (e.g. BT-DN110, SM-BTR2 depending on system generation)
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Input: USB 5V (PC or wall adapter)
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Functions:
- Battery charging
- E-Tube Project PC interface
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Connection Type: Shimano Di2 E-Tube junction port to USB
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Use With: SM-EW90 / EW-RS junction systems (depending on bike build)
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Cable: USB + Shimano Di2 connection cable included
Who Is It Suitable For?
- Riders using Shimano Dura-Ace Di2 11-speed (e.g. 9070 / 9150 era systems)
- Riders using Ultegra Di2 6770 / 6870 systems
- Cyclists with internal seatpost/frame-mounted Di2 batteries
- Mechanics servicing older electronic Shimano systems
Who Should Use It?
- Anyone who needs to charge an 11-speed Shimano Di2 battery
- Riders who want to update firmware or diagnose Di2 systems via PC
- Bike shops servicing older generation Di2 systems
- Owners of second-hand Di2 bikes missing the charger/interface unit
Riding Characteristics (Indirect Effect)
This is not a riding component, but it affects system reliability:
- Ensures consistent electronic shifting performance by maintaining battery charge
- Enables smooth, precise gear shifts through firmware updates
- Helps diagnose or prevent shifting issues via E-Tube connectivity
- No direct effect on ride feel, handling, or drivetrain performance
- Critical for keeping older Di2 systems fully functional and up to date
