Shimano BT-DN320 DI2 Battery Built In Type For 12 Speed

Full wireless technology means an all-new battery. The BT-DN320 fits snuggly and protected within the new wireless rear derailleur and powers the fast and smooth shifting Shimano is known for.
- Protected Battery: Tucked safely inside an enclosed space, the battery won't budge even in rough terrain, while remaining completely removable for charging.
- Compatible with charger EC-DN100
- Nominal capacity: 0.305Ah 2.32Wh
- For use with compatible MTB Di2 rear derailleurs