Shimano Di2 BT-DN300 Internal Battery

The new DN300 battery offers the same waterproof structure that Di2 users have loved for generations. Now equipped with 3 ports, it provides stable power to front derailleurs and Shimano 12-speed road shifters (with the fully wired option).
With the same dimensions as the previous model, the slim DN300 battery can be housed in seat posts or frames, ensuring a clean aesthetic.
Now equipped with 3 ports, the DN300 model simplifies wiring to the front and rear derailleurs, providing stable power supply.
The third port is for those who want redundancy with Shimano's 12v Di2 wired option. The battery is compatible with the new generation thinner SD300 electric wire and with systems following the R9250/R8150 series.

Features

• 3 SD300 ports
• Mounting method shared with BT-DN110
• Model: BT-DN300
• Series: DURA-ACE R9200 Series
  
• Type: Built-in battery
• Compatible charger: TBD
• Firmware updated via E-TUBE PROJECT
• Chemical composition: Lithium ions
• Nominal capacity (Ah): 0.5
• Nominal capacity (Wh): 3.7
• Nominal voltage (V): 7.4
• Actual weight: 52 g.

E-TUBE Technology

E-TUBE is Shimano's "service" that uses websites or apps to maximize the joy of cycling by connecting riders, bikes, and Shimano.

N.B. the product may be shipped in OEM (After Market) packaging.

Founded in 1921 in Sakai, Japan, by Shozaburo Shimano, Shimano is still based in the same city today. For cyclists, it makes drivetrains, brakes, wheels, pedals and cycling shoes. Its history in bicycle components began with the production of freewheels in 1922.