Tune Energietrager

Due to the absence of an elegant, lightweight method to securely position your Shimano Di2 battery in your seatpost, Tune has masterfully created a simple solution to this common problem. The Energietrager from Tune is a straightforward aluminum-and-silicon compression wedge that can be installed on your internal seatpost battery in seconds. By utilizing a friction-inducing silicon wedge, the battery is firmly held inside the seatpost, resulting in a clean aesthetic and peace of mind. Available in 2 sizes, size S is compatible with seatposts featuring a 26.8 - 27.6mm inner diameter, while size M is designed for 28 - 30mm inner diameter posts. Detailed installation instructions are included with each Energietrager.