What is inside of a Shimano Di2 Internal SM-BCR2 Battery

Shimano Ultegra Di2 E-tube Built-in Type Battery, Black

Shimano Di2 Battery Replacement/Di2 Battery Not Charging(complete strip and rebuild, cost £13.99)

Di2 crushed wire replacement

Shimano Di2 SM-BCR2 Charger

Padrone Smart+ with DI2

Shimano SM-BTR2 Di2 Battery - Components

Shimano Non-Series Di2 SM-BCR1 Di2 external battery charger

Shimano - BT-DN110-A Di2 Battery for internal mounting – ADVENTURE

How To Adjust Shimano Di2 Electronic Gears On A Road Bike

Hands on with Shimano XTR Di2 at Interbike Outdoor Demo 2014 with Jenson USA