1. Overview
The eufy Security Backup Battery for HomeBase 2 provides an uninterrupted power supply to your eufy HomeBase 2 during power outages and emergencies. This ensures your eufy security cameras continue recording and your system remains operational, offering up to 8 hours of continuous power.

Image: The eufy Security Backup Battery, a compact white device designed to sit beneath the HomeBase 2.

Image: A eufy HomeBase 2 with the backup battery attached, demonstrating continuous recording on a smartphone app during a simulated blackout.
2. Safety Information
Please read and understand all safety instructions before using this product. Failure to follow these instructions may result in fire, electric shock, or other injury or damage.
- Do not expose the battery to extreme temperatures (above 45°C or below 0°C).
- Do not disassemble, modify, or attempt to repair the device.
- Keep the device away from water, moisture, and flammable materials.
- Use only the provided power adapter or a certified equivalent.
- The eufy Backup Battery includes built-in protections against overcharge, high-temperature, overcurrent, and overvoltage to ensure safe operation.

Image: The eufy Backup Battery highlighting its safety features: Overcharge Protection, High-Temperature Protection, Overcurrent Protection, and Overvoltage Protection.
3. Package Contents
- eufy Security Backup Battery for HomeBase 2
- User Manual
4. Setup & Installation
The eufy Backup Battery is designed for simple plug-and-play installation with your eufy HomeBase 2.
- Step 1: Disconnect the power adapter from your eufy HomeBase 2.
- Step 2: Connect the eufy Backup Battery to the power input port on the back of your HomeBase 2. The battery is designed to fit seamlessly underneath the HomeBase 2 unit.
- Step 3: Connect the HomeBase 2's power adapter into the power input port on the eufy Backup Battery.
- Step 4: Ensure all connections are secure. The HomeBase 2 will power on, and the backup battery will begin charging if necessary.

Image: A three-step diagram illustrating the easy installation process: 1. Disconnect HomeBase 2 power. 2. Connect backup battery to HomeBase 2. 3. Connect power adapter to backup battery.

Image: A close-up view of the eufy HomeBase 2's rear ports, showing the power cable from the backup battery connected to the HomeBase 2.
5. Operation
Once installed, the eufy Backup Battery operates automatically. It charges when the HomeBase 2 is connected to mains power and seamlessly switches to battery power during an outage.
- Automatic Power Switching: The battery automatically detects a power outage and provides power to the HomeBase 2 without interruption.
- Battery Life: The backup battery provides up to 8 hours of power to your HomeBase 2, depending on usage and connected devices.
- Charging: The battery recharges automatically when mains power is restored.
6. Maintenance
To ensure optimal performance and longevity of your eufy Backup Battery, follow these maintenance guidelines:
- Cleaning: Wipe the device with a soft, dry cloth. Do not use liquid cleaners or aerosols.
- Storage: Store the battery in a cool, dry place away from direct sunlight and extreme temperatures.
- Regular Use: For best battery health, avoid prolonged periods of complete discharge or full charge without use.
7. Troubleshooting
If you encounter issues with your eufy Backup Battery, refer to the following common solutions:
- Battery not providing power: Ensure the battery is correctly connected between the HomeBase 2 and its power adapter. Check if the HomeBase 2's power adapter is functioning.
- Battery not charging: Verify that the HomeBase 2's power adapter is securely plugged into a working outlet and connected to the backup battery.
- Short battery life: Ensure the battery has been fully charged. Environmental factors and the number of connected devices to the HomeBase 2 can affect battery duration.
For further assistance, please visit the eufy Security support website or contact customer service.
8. Specifications
| Feature | Detail |
|---|---|
| Model Number | T8732021 |
| Product Dimensions | 0.04 x 0.04 x 0.04 inches |
| Item Weight | 8.4 ounces |
| Battery Type | 1 Lithium Ion battery (included) |
| Battery Cell Composition | Lithium |
| Battery Capacity | 1500 Milliampere Hour (mAh) |
| Manufacturer | eufy |
| Compatibility | eufy HomeBase 2 |
9. Warranty & Support
eufy Security products come with a limited warranty. For detailed warranty information, product registration, and technical support, please visit the official eufy Security website:
You can also find FAQs and community forums for additional assistance.