BT-DN320 Rear Derailleur Battery Description:

This Shimano BT-DN320 Rear Derailleur Battery is intended for use with Shimano Di2 rear derailleurs, powering smooth shifting on longer rides with a single charge.

Features:

• Replacement system battery for Shimano Derailleurs
• Protected design remains safely housed when installed
• 310 MaH battery capacity provides more riding per charge

Specifications:

• Compatible: Shimano Di2 Derailleurs, EC-EN100 chargers

This product was added to our catalog on June 4, 2025