Shimano BT-DN110-A Di2 Internal Battery
SHIMANO BIKE COMPONENTS > Di2 > ACCESSORIES
SKU code: SHM-IBTDN110A2
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The Shimano BT-DN110-A is the internal lithium-ion battery that powers Shimano's E-Tube Di2 electronic shifting systems across road, gravel and mountain bike platforms. Slim and cylindrical, it mounts discreetly inside a compatible seatpost or frame battery mount, keeping your cockpit and frame clean while delivering enough power for up to 2,000 km of shifting between charges.
Highlights
- Compact internal design: Cylindrical 17 mm × 160 mm profile slots neatly into seatposts or frame-integrated mounts for a clean, cable-tidy build.
- Extended range: 7.4V / 500 mAh (3.7 Wh) capacity delivers an estimated 1,000–2,000 km of shifting per charge depending on terrain and front derailleur usage.
- Smart low-battery protection: When power drops critically low, the system locks the front derailleur while preserving rear shifting, so you're never stranded mid-ride.
- Synchronized Shifting ready: Onboard processing chip enables Shimano's Synchronized Shifting and Semi-Synchro modes across compatible groupsets.
- Fast charging: Reaches full charge in approximately 90 minutes via a USB adapter supplying at least 1A, or around 3 hours via a standard computer USB port.
- Firmware upgradeable: Update Di2 firmware and customise shifting via the Shimano E-Tube Project app (EW-WU101 or SC-MT800 wireless unit required for wireless updates).
Charging
The BT-DN110-A charges via the SM-BCR2 battery charger, which connects through the Di2 junction box. Charging time is approximately 90 minutes from a USB power adapter providing at least 1A, or around 3 hours from a standard computer USB port. The E-Tube Project app displays current battery level in real time when connected to a compatible wireless unit.
Compatibility & Fit
Compatible with Shimano 10- and 11-speed E-Tube Di2 systems including Dura-Ace R9150, Ultegra R8050, 105 R7150, XTR M9050, Deore XT M8050, GRX RX815, and Alfine/Nexus Di2 internal hub systems. Not compatible with first-generation Di2 systems that pre-date the E-Tube architecture. Connects via a single EW-SD50 port. Can be mounted externally using the optional SM-BTC1 bracket. Charger sold separately (SM-BCR2).
- Internal lithium-ion Di2 battery in a compact 17 mm × 160 mm cylindrical form factor
- 7.4V / 500 mAh (3.7 Wh) capacity — up to 2,000 km of shifting per charge
- Fits inside compatible seatposts or frame battery mounts for a clean build
- Smart low-battery mode locks front derailleur to preserve rear shifting
- Synchronized Shifting and Semi-Synchro capable via onboard processing
- Charges in ~90 minutes via SM-BCR2 charger and 1A+ USB adapter
- Single EW-SD50 port connection to the Di2 E-Tube network
- Firmware upgradeable via Shimano E-Tube Project app
- Compatible with Dura-Ace, Ultegra, 105, XTR, Deore XT, GRX, Alfine and Nexus Di2 systems
| Part Number | BT-DN110-A |
| Battery Type | Lithium-ion (internal/built-in) |
| Voltage | 7.4V |
| Capacity | 500 mAh (3.7 Wh) |
| Weight | 50 g |
| Diameter | 17 mm |
| Length | 160 mm |
| Port | 1 × EW-SD50 |
| Charge Time | ~90 min (1A+ USB adapter) / ~3 hr (computer USB) |
| Compatible Charger | SM-BCR2 |
| Speed Compatibility | 10 / 11-speed Di2 E-Tube systems |
| Colour | Grey |
| SKU | SHM-IBTDN110A2 |
| Barcode # | 4524667329046 |
| Brand | Shimano |
| Shipping Weight | 0.3000kg |
| Shipping Cubic | 0.001000000m3 |
| Unit Of Measure | each |
Must be installed and serviced by qualified bicycle mechanic
