Shimano DI2 BT-DN110 3.7Wh internal seatpost battery

Shimano ’s Di2 BT-DN110 3.7Wh internal battery is an essential component for the smooth operation of Shimano electronic drivetrains. Designed for discreet fitting within the seatpost or frame, it ensures a clean, integrated look and optimal protection against the elements.

Featuring high-performance lithium-ion technology (3.7 Wh / 7.4 V / 500 mAh), this battery offers an impressive range of up to approximately 2,000 km, depending on usage.

As the true ‘brain’ of the Di2 system, the BT-DN110 also acts as the Master Unit, enabling communication with wireless accessories (Bluetooth / ANT+) and connection to the Shimano E-Tube app for system configuration and updates.

Compatible with many Shimano groupsets (Ultegra, Dura-Ace, XT Di2), it is a superior replacement for older batteries and provides access to advanced features such as Synchro Shift.

Compact (≈ 50 g) and easy to fit, it is a reliable and durable solution to keep your electronic drivetrain performing at its best.

A key component for getting the most out of the precision and smoothness of Di2 gear changes.

 Key features

• Discreet and protected internal battery
• Long battery life (up to ~2,000 km)
• Bluetooth / ANT+ functionality (Master Unit)
• Compatible with many Di2 groupsets Shimano
• Lightweight, compact and reliable