BT-DN300 Battery
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BT-DN300 Battery delivers lightweight, reliable power for wireless Di2 shifting across all riding disciplines
What Our Gearhead® Experts Are Saying:
"This battery made my Di2 upgrade seamless. It installs quickly in the seat tube, barely adds weight, and delivers all-season runtimes—huge step up from the older version."
BT-DN300 Battery is the brains behind the next generation of Shimano’s Dura-Ace and Ultegra Di2 systems, supporting advanced wireless shifting for road, gravel, and cyclocross bikes. Packed into a compact, 59g design, it mounts stealthily in the seat tube to power both front and rear derailleurs via a single, low-profile connection. The upgraded 300-series wiring boosts reliability and integrates seamlessly with Shimano’s latest wireless controls, making setup fast and essentially maintenance-free.
Engineered for longevity, the BT-DN300 delivers increased charge and extended runtimes compared to previous generations, meaning more rides between plug-ins for those who train or explore year-round. The battery also features consistent voltage output—key to smooth shifting and quick response under racing or adventure conditions. Officially compatible only with the new 12-speed Di2 series, this battery is a must-have for those futureproofing a high-performance drivetrain or refreshing a modern, wireless setup.
Details
- Di2 seat tube battery engineered for latest Dura-Ace and Ultegra wireless systems
- Powers both derailleurs with compact, single-unit design
- Quick-connect 300-series wiring improves wireless reliability and control
- Delivers longer charge and more cycles than previous generation Di2 batteries
- Consistent voltage output supports precise, responsive electronic shifting
- Compatible only with Shimano’s latest 12-speed Di2 drivetrain setups
- Lightweight build (59g) integrates seamlessly into seat tube or frame
- Item #SHIU1E6
- Compatibility
- Dura-Ace Di2
- Claimed Weight
- 59g
- Activity
- road cycling, gravel, cyclocross
- Manufacturer Warranty
- 1 year
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