Bike Parts Shimano Di2 BT-DN300 Internal Mount Battery

The power house of Shimano Di2 is a long-life 7.4V Li-Ion battery that is both compact and reliable, taking shifting effort away from you.

Excellent sealing and reliability have been proven through repeated field tests in various riding conditions, including extreme temperatures, rain, mud, and cobble stone roads.

The use of a single small and discreet internal battery is light weight, efficient and creates a robust and reliable system. One charge gives a 1000 kilometre range depending on conditions and front mech operation (as this is the main power drain).