Shimano BT-DN300 Built-In DI2 Battery

The Shimano BT-DN300 Built-In Di2 Battery is the internal power unit for Shimano’s latest Di2 electronic shifting systems, designed to deliver stable and reliable energy to keep shifting performance precise and consistent on every ride.

Engineered for full integration within the bike frame, the BT-DN300 helps maintain a clean, aerodynamic setup while powering all connected Di2 components. It works as part of a complete Shimano Di2 system that includes a compatible charger and power cable to ensure proper operation and charging capability.

For optimal performance, all Di2 components must run matching firmware versions. Shimano systems require firmware synchronization to avoid communication issues between drivetrain components. Firmware updates and system checks can be managed through Shimano’s E-Tube Project platform.

Key Features

• Internal Di2 Power Unit – Compact built-in battery designed for clean frame integration and reliable electronic shifting power
• Complete System Requirement – Works alongside Shimano Di2 charger and power cable for full system functionality
• Firmware-Synchronized Operation – Requires matched firmware across all Di2 components for proper performance and reliability

Utilize the Di2 system checker to conveniently update component firmware via Shimano E-TUBE PROJECT Cyclist.

For Dura-Ace 9150 and Ultegra R8150 Systems.