Shimano Di2 Dura-Ace Charger Cable Electrical outlet power cable for Di2 Dura-Ace battery charger. Note - To complete the Di2 System all items listed below are required. To maximize the performance and utilize Di2 to its fullest potential it is very highly recommended all other components(brakes/crankset/ect.) be Shimano Dura-Ace 7900 series. | Shimano Di2 SM-Bcr1 Charger Power Cable Battery Charger Cable, SM-Bcc1-2