Shimano Di2 SM-BTR1 Battery Pack

Item: 50-7483
Save $25.00 (32%) $52.99 MSRP $77.99
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This 7.4V, high-performance Lithium Ion battery will keep your Di2 system supplied with power no matter what. Field tested and proven to deliver reliable performance in even the worst weather conditions, the rechargeable Di2 battery holds a 1000km charge, regardless of how often you shift. Lithium Ion technology is lighter, more compact and better performing than other power sources. Mounting bracket easily adapts to all road bikes and allows Di2 battery to be removed easily for charging.

What you need to know: Ultegra Di2 Conversion
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