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Shimano Di2 Power Cables. Must purchase battery, charger, and power cable to complete the system - Di2 Battery, battery charger, and power cable are universal between Dura-Ace 7970 and Ultegra 6770 Di2 systems - This is the power cable for the Di2 Battery Charger (CY7972) - FD/Shifter Compatibility: Dura-Ace 7970 Di2 , Shimano Ultegra Di2

This is the correct plug-and-play wire for Shimano's E-Tube Di2 electric-shifting systems. It comes in sixteen different lengths, so choose the one(s) that's right for your Di2 E-Tube wiring configuration.