By A Mystery Man Writer
Nobody goes Di2 so that they can mount an unsightly battery somewhere on their gorgeous bike. Shimano knows what is up and the internal battery was a quick answer to the complaints of the original external battery. The only needed component is one of the cockpit junction boxes to attach a charger since the battery is no longer easily removable for charging. Either the 3 port SM-EW90-A or the 5 port SM-EW90-F will do the trick.
Shimano, BT-DN110 Di2 Battery, Internal, with Bluetooth
Shimano BT-DN110-A Di2 Battery - Components
Shimano Di2 BT-DN110-A2 Internal Battery - Cycle House
Shimano BT-DN110 Di2 Battery - Bow Cycle, Calgary, AB
Shimano Di2 Ultegra Derailleur Shimano Di2 Battery Bt Dn110
Shimano, BT-DN110 Di2 Battery, Internal, with Bluetooth
Shimano BT-DN110-A Di2 Battery
Shimano BT-DN110 Di2 Battery
Shimano BT-DN110 Di2 Internal Battery - La Bicicletta Toronto
Shimano SM BTR2 Di2 Internal Battery