Shimano Di2 BT-DN110-1 Built-In Battery – Internal E-Tube Battery For Di2 Groupsets

If your Shimano Di2 shifting is getting sluggish, the battery might be on its way out.

This is the BT-DN110-1, the built-in internal battery for most Di2 setups.

It hides inside the seatpost or frame, keeping things clean.

It's the heart of your electronic shifting system, so you want a genuine Shimano replacement.

This one's brand new, still sealed.

MPN is 576775, and the size is BT-DN110-1.

Weighs about 1.0000 (probably pounds, but who's counting?).

Get your shifting crisp again with a fresh Di2 battery.

Easy install if you're comfortable running the wires through the frame.