Shimano Battery BT-DN300 Built-In Type 12 Speed Dura Ace/Ultegra

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 R9150 and R8150 series systems
• Features three SD300 wire ports
• Shared fixing method with BT-DN110
• Built-in type

First, you'll get 10% in store credit to use towards future purchases.

Our prices match the prices you might see on any brand's website, and our delivery times are roughly the same as theirs.

Also, 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.