SHIMANO Di2 Inline Wireless Unit - EW-WU111 One Color, One Size, Compatibility: Shimano Di2 E-Tube systems, Shimano DN110 battery By Visit the SHIMANO Store - Walmart.com
Shimano Di2 BT-DN110-A Battery Pack | BIKE24
Shimano Di2 BT-DN110-A Battery Pack | BIKE24
Hands On Bike: Dahon MuSP: Di2 Battery Placement and Wiring Layout