The new DN300 battery features the same waterproof design that Di2 users have loved for generations. Now with 3 ports, it delivers stable power to Shimano's 12-speed road derailleurs and shifters (if a fully wired option is selected).

SPECIFICATIONS

• Model No: BT-DN300
• Series: Ultegra R8100 Series
• Average weight: 52
• Type: Built-in battery
• Compatible charger: RD-R9250, RD-R8150, RD-R7150 (NEW)
• Firmware update by E-Tube Project: Yes
• Master unit: Yes
• Chemistry: Li-Ion
• Rated capacity (Ah): 0.5
• Rated capacity (Wh): 3.7
• Rated voltage (V): 7.4
• SD300 connector (pcs): 0
• SD300 port (pcs): 3
• SD50 connector (pcs): 0
• SD50 port (pcs): 0