Shimano Di2 SM-BTR1 External Battery
This Lithium Ion battery for Shimano Di2 electronic shifting systems was developed as an external battery option for e-Tube wiring on frames without frame integrated / internal wiring options. This is the battery only, no mount or charger included. Shimano mount options, which have the e-Tube port and communications technology required.
- External e-Tube compatible Di2 battery; reliable Lithium Ion power for Di2 systems
- Designed to connect with mount for externally wired e-Tube systems
- Incredibly durable, sealed composite housing
- At full charge the battery can deliver up to/around 1000 miles of use
- Battery only; mounting system and charger sold separately.
- Weight: 70 grams
- Shimano part# ISMBTR1A
All Di2 components on the bicycle require the same firmware version. Using Di2 components with different firmware versions may cause malfunctions.