What Is It?
The Shimano BT-DN320 Di2 Battery is a compact rechargeable lithium-ion battery designed to power Shimano's latest 12-speed wireless Di2 MTB and GRX electronic shifting systems. Unlike previous internal Di2 batteries that were mounted inside the frame or seatpost, the BT-DN320 installs directly inside the compatible wireless rear derailleur, providing a cleaner design, simplified installation, and excellent protection from impacts and the elements.
With a 305 mAh (2.32 Wh) capacity, the BT-DN320 delivers reliable power for Shimano's fully wireless XTR, Deore XT, Deore, and GRX Di2 rear derailleurs, while remaining quick and easy to remove for charging.
Key Benefits
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Designed for Wireless Di2: Powers Shimano's latest fully wireless 12-speed MTB and GRX Di2 drivetrains.
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Derailleur-Mounted Design: Fits securely inside the compatible rear derailleur, eliminating frame-mounted batteries and wiring.
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Protected Installation: Enclosed within the derailleur to shield it from mud, water, impacts, and debris.
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Quick Removal: Easily removed for charging without dismantling the drivetrain.
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Long Battery Life: 305 mAh lithium-ion battery provides extended riding between charges.
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Compact & Lightweight: Small form factor adds minimal weight to the drivetrain.
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Genuine Shimano Component: Engineered for dependable performance and seamless integration with Shimano Di2 systems.
Specifications
| Specification |
Details |
| Product |
Shimano BT-DN320 Di2 Battery |
| Battery Type |
Rechargeable Lithium-Ion |
| Capacity |
305 mAh |
| Energy |
2.32 Wh |
| Nominal Voltage |
7.6 V |
| Mounting Location |
Inside compatible wireless rear derailleur |
| Charging |
Removable battery (compatible Shimano charger required) |
| Weight |
Approximately 23 g |
| Colour |
Black |
| Application |
Shimano 12-speed Wireless Di2 MTB & GRX |
Compatible Components
The Shimano BT-DN320 is compatible with:
- XTR RD-M9250-GS / SGS
- Deore XT RD-M8250-GS / SGS
- Deore RD-M6250-SGS
- GRX RD-RX827-SGS
- Compatible Shimano 12-speed wireless Di2 systems using the BT-DN320 platform.
Who Is This Best Suited For?
The Shimano BT-DN320 Di2 Battery is ideal for:
- Cross-country (XC) racers
- Trail riders
- Enduro riders
- Gravel riders
- Adventure cyclists
- Riders using Shimano's latest wireless Di2 drivetrain
- Cyclists wanting a spare battery for extended rides or multi-day events
- Riders replacing a worn or damaged BT-DN320 battery
Compatibility Note: The BT-DN320 is not compatible with previous Shimano Di2 batteries such as the BT-DN110 or BT-DN300. It is designed exclusively for Shimano's latest wireless 12-speed MTB and GRX Di2 rear derailleurs, where it mounts directly inside the derailleur body.
