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The third port is for riders who seek the redundancy of Shimano's 12-speed Di2 wired option. - Compatible with thinner next generation electric wire
Shimano BT-DN110-A Di2 Battery - Components
Shimano Di2 BT-DN300 Battery for Internal Mount - bike-components
Shimano 105 Di2 R7170 2×12 Speed Groupset – Pedal Force super-light carbon bicycle
Shimano DURA ACE Di2 R9250/R9270 2x12-speed Upgrade Kit Disc 11-34 Groups
SHIMANO Dura Ace Di2 Groupset - Westdene Cycles
SHIMANO BT-DN300 Built-in DI2 Battery - for Dura-Ace 9150 and Ultegra R8150 Systems, Compatible with SD300 Wires : Sports & Outdoors
日本オーダー Shimano BT-DN300 Di2
Shimano Di2 BT-DN300 Battery (Built-In Type)
Shimano DURA ACE BT-DN300 Built-In Type Di2 Battery Internal SD300 Type The new DN300 battery features the same waterproof design that Di2 users have
Shimano DURA ACE BT-DN300 Built-In Type Di2 Battery SD300 Type - Bulk / OEM
The new EC300 charging connector is designed specifically for Shimano's 12-speed Di2 road drivetrains. Connected via the rear derailleur, it is also compatible with Shimano power meters. Charging of the new Shimano 12-speed Di2 road drivetrains is now accomplished with the EC300 charger cord. Attached to the rear derailleur, this new cord is less expensive than previous chargers and can also be used to charge Shimano power meters.
Shimano EW-EC300 Charging Cable