Shimano Di2 BT-DN300 Internal Battery

Shimano Di2 BT-DN300 internal battery
Shimano manufacturer reference: IBTDN3001

Thanks to its compact dimensions, the Shimano BT-DN300 flat battery can be discreetly integrated into the seat post or frame. Not only does it have the same dimensions as the predecessor model BT-DN110, but it is also not inferior in terms of waterproofing.

The lithium-ion battery has three SD300 connectors for connection to the front and rear derailleurs. The third connection is used in the case of a fully wired Di2 shifting group.

In-house testing of components from the current Dura Ace R9200/R9250 and Ultegra R8100/R8150 12-speed series has shown that the battery provides a powerful and stable power supply for the powerful front and rear derailleur actuators during a range of 1,000 km on average.

Technical details of the Shimano BT-DN300 Di2 battery
battery type: Li-Ion
rated capacity: 3.7Wh / 0.5Ah
rated voltage: 7.4V
connectors: 3x EW-SD300