The DN300 battery maintains the waterproof design trusted by Di2 users while providing stable power to Shimano 12-speed road systems. Its slim profile allows it to be housed inside seat posts or frames to ensure a clean bike aesthetic.

Now featuring three ports, the DN300 simplifies wiring to front and rear derailleurs. The additional port offers a fully wired option for riders seeking maximum redundancy, making it compatible with the next generation SD300 electric wires.

Quick Facts

Feature	Specification
Compatibility	Shimano 12-speed Di2 (R9250/R8150 series and later)
Port Configuration	3 SD300 ports for thinner next-gen electric wire
Mounting	Internal (Seat post or frame); shares fixing method with BT-DN110
Weather Resistance	Waterproof construction
Wiring Options	Supports semi-wireless or fully wired configurations
Power Delivery	Stable power supply for derailleurs and shifters