Shimano Di2 SM-BTR2 Battery Pack for Dura Ace
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Rechargeable battery pack with 500mAh for Di2 (Dura Ace / Ultegra 6870 and XTR M9050).
The lithium-ion battery SM-BTR2 can be mounted internal or external. The internal assembly takes place in the frame or in the seat post. For external mounting the SM-BTC1 bracket is required.
The battery provides a long service life and a high battery performance (up to 2.000km with one charge). The optional connection cable (EW-SD50) are available (from 250 to 1400mm) in various lengths. Measurements: Ø17mm; length 160mm. Capacity: 500mAh.
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