Full wireless technology means an all-new Battery. The BT-DN320 fits snuggly and
protected within the new Wireless XTR Rear Derailleur and powers the fast and
smooth shifting XTR 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.

Longevity
310 MaH provides for more riding on one charge