While the Dura-Ace R9200 rear derailleur is wired to a Di2 battery, it manages the wireless signals from the shifters. It also has the charging port for the Di2 cell. Photo: Nick Iwanyshyn
While the Dura-Ace R9200 rear derailleur is wired to a Di2 battery, it manages the wireless signals from the shifters. It also has the charging port for the Di2 cell. Photo: Nick Iwanyshyn