Shimano DI2 BT-DN300 internal seat post battery

Shimano ’s Di2 BT-DN300 internal battery is at the heart of the Shimano 12-speed electronic drivetrain, designed to offer reliability, discreet integration and advanced connectivity. It is fitted directly into the seatpost or frame, ensuring a neat and protected installation.

Equipped with a 3.7 Wh lithium-ion battery (7.4 V / 500 mAh), it offers a range of up to 2,000 km, ideal for long rides as well as intensive use.

This new generation introduces a major development: 3 SD300 ports, allowing for simplified cabling of the front and rear derailleurs, whilst retaining a wired option for certain set-ups.

Compatible with recent Shimano s such as Dura-Ace R9200, Ultegra R8100 and 105 Di2, it works exclusively with EW-SD300 cables, which are slimmer and more modern.

Connected to the E-Tube platform, the BT-DN300 enables firmware updates, customisation of settings and access to advanced features such as Synchro Shift.

An essential battery for getting the most out of the performance of the latest-generation Shimano electronic groupsets.

Key features

• Compatible with 12-speed Di2 (R9200 / R8100 / R7100)
• 3 SD300 ports for simplified cabling
• Long battery life (~2,000 km)
• Discreet and protected internal battery
• E-Tube compatible (settings & updates)

Technical specifications

- 3-port battery for R9200 and R8100 road groupsets
- 0.5Ah, 3.7W and 7.4V
- Same internal mounting as the Shimano battery BT-DN 110
- Manufacturer’s weight: 52 grams
- Part number Shimano BT-DN300
- Brand: Shimano