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The Shimano Di2 battery SM-BTR1 - For external mounting on the down tube
The Shimano Di2 battery SM-BTR1 for external mounting is a rechargeable lithium-ion battery for older and current Shimano electronic shifting groupsets. It is attached to the outside of the down tube with a bracket and is suitable for both internal and external cable routing. The battery has a maximum range of 2000 kilometres.
Information regarding the return of batteries and electrical equipment:
Learn more about returning and recycling used batteries and electronic devices here.
Type: lithium-ion battery
Voltage: 7.4 V
Energy Quantity: 3.7 Wh
Capacity: 500 mAh
Charge Time: ca. 90 minutes
- Dura Ace Di2 7970
- Dura Ace Di2 9070
- Dura Ace Di2 R9150
- Ultegra Di2 6770
- Ultegra Di2 6870
- Ultegra Di2 R8050
- GRX Di2 RX815
- Alfine/Nexus Di2
- XTR Di2 M9050
- XT Di2 M8050
- model SM-BTR1 type 1 for external mounting
- external or internal cable routing possible
- service life of at least 500 charges
- minimum range 1000 km, maximum 2000 km
- easy removal and insertion for charging in the battery mount
- excellent reliability
- recycling mark
- compatible charger SM-BCR1 sold separately
E-Tube is a system platform for the Di2 concept (Digital Integrated Intelligence). E-Tube transmits interactive signals and supplies all electronic parts with power via " Plug & Play" connections. E-Tube is resistant to corrosion, expansion and frost and ensures low maintenance. It offers optimal flexibility for your bike. With E-Tube Project you can customise the settings of electronic components and update the firmware via Windows PC, tablet or smartphone. It provides quick and easy access to information on electronic components and provides an instant overview of system status.
What happens if the battery charge level drops?
If the charge level is less than 25 %, a red warning light on the control unit of the cable starts to glow permanently. However, it can still be shifted over a distance of about 250 kilometres. If the battery is completely discharged, the red warning light flashes. In the worst case, first the front derailleur fails and then the rear derailleur stops in its current position. Of course, it can still be ridden.
- green glowing: 100 %
- green flashing: 50 %
- red glowing: 25 %
- red flashing: 0 %
Manufacturer Part Number:
- 1 x Shimano Di2 SM-BTR1 battery
- battery mount
- universal/universal: 70 g