Di2 Power Kit - Bike Build

What Our Gearhead® Experts Are Saying:

"I spec'd the Di2 Power Kit into a custom Ultegra build for a client chasing marginal gains on long stage races, and the internal battery combined with the E-Tube junction boxes let us route everything with zero visible cable clutter. Charging the system between stages took less time than it took to refuel, thanks to the 90-minute internal charger. Pairing the wireless unit to a head unit gave us live gear ratio and battery data mid-stage, which matters when there's no room for a mechanical failure."

We built the Di2 Power Kit around the demands of a race day drivetrain, where every gram and every watt of hesitation counts. The BT-DN110-A battery mounts internally for a full charge that lasts months of hard riding, feeding Shimano's E-Tube system through junction boxes rated for Ultegra and Dura-Ace groupsets alike. The EW-WU111 inline wireless unit layers in Bluetooth and ANT+ connectivity, streaming gear position and battery status straight to a compatible head unit. Add the internal charger for a 90-minute refill, and the cockpit junction box for supplemental shift buttons in the drops, and the whole system runs as one clean, race-ready circuit with no wasted movement.