SHIMANO SM-BTR2 E-Tube Dura Ace and Ultegra Di2 Battery

SHIMANO SM-BTR2 E-Tube Dura Ace and Ultegra Di2 Battery
- Meticulously sealed against the elements Low battery life indicators warn you at 50%, 25%, and critically low levels so you always know when to recharge
- Does not include charger
The Shimano BTR1 is a lithium ion battery compatible with both Dura Ace and Ultegra Di2 electronic shifting groups. It features a battery life of between 600 to 1500 miles depending on how much you shift, recharges in one and a half hours, and has no charge memory so you can charge it as often as you like. Charger sold separately.

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