Shimano Di2 BT-DN110-A Battery for internal mounting

The Shimano BT‑DN110‑A is a compact, waterproof lithium-ion battery designed for internal mounting (e.g., in seatposts or frames) in Shimano Di2 electronic shifting systems. It powers the E‑Tube network, enabling reliable wireless firmware updates, synchronized shifting, and robust performance even in harsh riding conditions.

Features

• Internal mountable in seat post, frame, steerer tube, etc.

• Waterproof and rugged E‑Tube connector design

• Compatible with Shimano’s SM‑BCR2 charger – no need to dismount frame

• Enables wireless firmware updates and Synchro‑Shift

• Long-range: ~1,000–2,000 km per charge depending on usage

• Supports Bluetooth LE diagnostics and customization

• Comes with mounting adapters, washers, snap‑ring, and collar