Shimano BT-DN300 Built-In Di2 Battery

The Shimano BT-DN300 Built-In Type Di2 Battery is the power source for Shimano's 12-speed Di2 derailleurs and shifters in fully-wired configurations. While remaining the same size as its predecessor, the DN300 now has 3 connection ports to enable simple wiring options. Its thin, sleek profile allows the battery to fit in seatposts or frames for a clean look.

Features
- Compatible with thinner next generation electric wire SD300 and systems after R9250/R8150 series
- 3 SD300 ports
- Shared fixing method with BT-DN110
- Waterproof design

Specifications
Battery Chemistry: Li-Ion
Rated Voltage: 7.4V
Rated Capacity: 0.5 Ah / 3.7Wh
Ports: SD300 x3
Weight: 52g