Standard USB Connection.
Compact Portable Fast USB-C Bike Charger Adapter for Shimano 12S Di2 Electronic
Shimano DURA-ACE EW-EC300 Charging Connector Cable 1500mm for 12S Di2, Type-A
Di2 Charger Adapte, USB-C Bike Derailleur Charger Adapter for 12-speed Electronic Derailleur 12S Di2 R9270, R9250, R8170, R8150
Shimano Non-Series Di2 Di2 EW-SD300 E-tube Di2 Electric Wire
