Shimano Di2 BT-DN110-A Internal Battery (North American)

Digital Core.

The BT-DN110-A is a significant upgrade over earlier internal batteries. It features an advanced master unit (the "brain") that allows your drivetrain to communicate wirelessly with smartphones and tablets via the E-TUBE Project app. This means you can customize your shift buttons, update firmware, and monitor battery life without ever plugging in a cable to your computer.

Why the BT-DN110-A is a Must-Have Upgrade:

• Wireless Intelligence: Unlocks Bluetooth LE (Low Energy) and ANT+ communication when paired with a wireless unit (like the EW-WU111). This allows for on-the-fly tuning and data display on your Garmin or Wahoo bike computer.

• Synchronized Shifting: This battery is the "requirement" for using Shimano’s Syncro Shift technology. The system can automatically shift your front derailleur to maintain a smooth cadence as you move through the rear cassette.

• Clean, Internal Mounting: Specifically designed to be tucked away inside your seatpost or steertube. This protects the battery from the elements and maintains the clean, aerodynamic aesthetic of your frame.

• Long-Lasting Performance: Provides a massive range of approximately 1,000km to 2,000km on a single charge. It’s a "seasonal" maintenance item. Charge it once and forget about it for weeks of riding.

• Fast and Easy Charging: No need to remove the battery from the frame. Simply plug your SM-BCR2 charger into the junction port on your handlebar or frame to top up.

• Superior Weather Sealing: Built to survive the most grueling conditions, from dusty gravel races to rain-soaked winter commutes. The internal housing ensures the lithium cells remain protected and consistent.

Technical Specifications:

• Model: BT-DN110-A

• Chemistry: Lithium-Ion

• Voltage: 7.4V

• Capacity: 500mAh

• Ports: 1 x SD50 E-Tube Port

• Mounting: Internal (Seatpost / Seat Tube)

• Compatibility: All 11Speed Di2 systems (E-Tube)

The Alegro Perspective: If you are running an older internal battery and want to use the E-TUBE app or Syncro Shift, the BT-DN110-A is the single part you need. In the shop, we consider this a mandatory upgrade for anyone building a serious 11Speed gravel or road rig. It’s reliable, it’s light, and it’s the bridge between "mechanical" and truly "digital" cycling.

Wireless Connectivity. Internal Power. Unleash the potential of your Di2 with Shimano.