Shimano Di2 spares for the Ultegra 6700 and the new 11 speed 6800 Di2 groupsets plus the Dura Ace 7900 and the 11 speed Dura Ace 9000 Di2 Groupsets. Most of the Shimano Di2 spares are the same for both the Ultegra and Dura Ace Di2 electronic gear systems. At Merlin Cycles we stock the complete range of Di2 spares and accessories including Di2 batteries, Di2 battery mounts and Di2 electronic cables. You can also choose the choice of how to mount the battery and route the cables depending on if your frame is Di2 compatable. For Di2 frames you can usually mount the battery on special mounts under the chainstays or under the downtube, you can then run all the Di2 cables inside the frame. If your frame does not feature the internal wiring feature you can still enjoy all the features of Di2 electronic gear shifting as you can mount the battery in standard bottle cage mounts and route the wires externally and protect them with Shimano Di2 cover sheaths.