EW-SD300 type wire port (to connect to the battery, BT-DN300)
Charging cable looks like that of the FC-R9100-P power meter
No more Junction A, that’s all part of the rear derailleur now
Also, it transmits ‘Dual Control Lever battery status’ over BluetoothLE/ANT, suggesting that the levers have batteries in them.
(people on WW suggested self-charging levers, but I have no idea really)
What do you think the 3rd port of the new battery can connect to? It seems to be redundant given that shifters have enough of ports to connect with additional satellite/sprint shifter. Or it provides somewhat backward compatibility?
German Tour Magazine wrote about the new Cube Bikes that where just launched and stated, that new Dura Ace Di2 AND Ultegra Di2 will be releaset on Sept 1st.
On Cube´s Website you can also see that NDA will be endet on Aug 31st
So - waiting has come to an end. New semi wireless Di2 will be introduced very shortly.