BT-DN300 Di2 Battery

The new DN300 Built-In type battery features the same waterproof design that Di2 users have loved for generations. Now with 3 ports, it delivers

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-DN300 Built-In Type Di2 Battery, SD300 Type for DURA-ACE/ULTEGRA

Shimano Di2 battery too small for round seatpost : r/bikewrench

Hands On Bike: Specialized Aethos: Thru Axles, Roval Seatpost and Di2 Battery

Shimano BT-DN300 Di2 Internal Battery SD300 - R9250/R8150/7150 R9200 R8100 R7100

Shimano Di2 Battries BT-DN-300, Sports Equipment, Bicycles & Parts, Parts & Accessories on Carousell

Shimano BT-DN110-A Di2 Internal Battery – CCACHE

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-DN300 Di2 Built-in Battery 3 SD300 Port BTDN300 for Dura-Ace Ultegra

Shimano Di2 E-Tube BT-DN300 Built-in Battery Excel Sports

Shimano BT-DN110-A Di2 Internal Battery – CCACHE

Shimano E-Tube Di2 Battery Mount - Components