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Streamlined Di2 integration with the BT-DN300 Battery—slim, stable, and future-ready
What Our Gearhead® Experts Are Saying:
"I just started running the BT-DN300 in my new Di2 setup, and the clean look is a major win. It fits perfectly inside the seatpost, and the extra SD300 port gives me the wired backup I want for longer endurance rides."
When we want our Di2 system to be sleek, reliable, and ready for the road ahead, we install the Shimano BT-DN300. Designed to mount internally inside a seatpost or frame, this compact battery delivers steady power to front and rear derailleurs with a minimalist footprint.
With three SD300 ports and full compatibility with Shimano’s latest R9250 and R8150 12-speed Di2 groupsets, it supports both semi-wireless and fully wired configurations. For riders seeking extra reliability on long rides or remote adventures, that third port offers a trusted wired connection option—all without changing fit or form.
Details
- Compact Di2 battery mounts cleanly inside seatpost or frame
- Three SD300 ports support full or semi-wireless 12-speed setups
- Compatible with R9250, R8150, R7150, and RX825 Di2 systems
- Shares mounting design with previous BT-DN110 battery
- Li-Ion chemistry delivers stable 7.4V output
- E-TUBE PROJECT compatible for firmware updates
- Lightweight 52g construction for performance-focused builds
- Ideal for road, gravel, and endurance cycling with Di2 drivetrains
- Item #SHIU1OS
- Battery Type
- Lithium-Ion
- Capacity
- 0.5 Ah (3.7 Wh)
- Output
- 7.4V
- Compatibility
- Shimano Di2 R9250, R8150, R7150, RX825 series; SD300 wires
- Activity
- road, gravel, enduro
100+ Years in the Making
Founded in Japan in 1921, Shimano has spent over a century earning the trust of riders at every level. Their precision engineering and relentless drive to innovate have made Shimano components a fixture on trails and roads worldwide.