Shimano BT-DN300 Built-In DI2 Battery - Compatible with SD300 Wires

Shimano Di2 Batteries. Must purchase battery, charger, and power cable to complete the system.

• All Di2 components on the bicycle require the same firmware version. Using Di2 components with different firmware versions may cause malfunctions
• Use Di2 system checker to update component firmware from http://e-tubeproject.shimano.com/
• Compatible with thinner, next generation electric SD300 wires and R9250 and R8150 series systems
• Features three SD300 wire ports
• Shared fixing method with BT-DN110
• Built-in type

First, you'll get 5% back in store credit to use towards future purchases.

When you purchase through us, you get:

• Advice on whether the bike or product suits your needs.
• A professional build for all bikes, which ensures safety. If there is an issue, we can promise you that 99 out of 100 times, it will be resolved quicker than you can in your garage.
• A build history that becomes a service history, ideally. That can be very helpful if you do have any sort of warranty issue.
• Warranty support - Just contact us and we will guide you through the process.