1. Introduction
This manual provides instructions for the safe and effective use of your Ferrex 20V Li-ion Battery USB Power Bank Adapter. This adapter converts your Ferrex 20V lithium-ion battery into a portable power bank, allowing you to fast charge mobile phones and other USB-powered devices.
2. Safety Information
- Always ensure the adapter is securely connected to a compatible Ferrex 20V Li-ion battery.
- Do not expose the adapter to moisture, rain, or extreme temperatures.
- Do not attempt to disassemble or modify the adapter.
- Keep out of reach of children.
- Disconnect the adapter from the battery when not in use to prevent accidental discharge.
3. Setup
- Prepare the Battery: Ensure your Ferrex 20V Li-ion battery (not included) is fully charged.
- Attach the Adapter: Align the adapter with the battery terminal and slide it on until it clicks securely into place.


4. Operating Instructions
- Connect Device: Plug your mobile phone or other USB-powered device into either the USB or Type-C port on the adapter.
- Power On: Locate the power switch on the side of the adapter and slide it to the 'ON' position (usually indicated by 'I' or a line).
- Charging: Your device should begin charging. The adapter supports fast charging via its TYPE-C (PD) and USB (QC3.0) interfaces.
- Power Off: When charging is complete or when the adapter is not in use, slide the power switch to the 'OFF' position (usually indicated by 'O' or a circle).



Video 1: Demonstration of connecting a device to the power bank adapter.
5. Maintenance
- Cleaning: Use a dry, soft cloth to clean the adapter. Do not use liquid cleaners or solvents.
- Storage: Store the adapter in a cool, dry place away from direct sunlight and extreme temperatures.
- Battery Care: Although the battery is not included with the adapter, ensure your Ferrex 20V Li-ion battery is maintained according to its own manufacturer's instructions for optimal performance and longevity.
6. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Device not charging | Adapter not powered on Battery not connected securely Battery is depleted Charging cable is faulty Device is incompatible | Ensure the power switch is 'ON'. Re-attach the battery firmly. Charge the Ferrex 20V battery. Try a different charging cable. Verify device compatibility with USB/Type-C output specifications. |
| Slow charging | Device does not support fast charging Using a non-fast charging cable | Ensure your device supports QC3.0 or PD fast charging. Use a high-quality cable designed for fast charging. |
7. Specifications
| Feature | Detail |
|---|---|
| Product Type | Converted to 5-12V mobile phone fast charging power bank |
| Input Compatibility | Ferrex 20V Li-ion Battery (battery not included) |
| TYPE-C Output | 5V2A/5V3A, 9V/2A, 12V/1.5A (PD) |
| USB Output | 5V2A/5V3A, 9V/2A, 12V/1.5A (QC3.0) |
| Dimensions (L x W x H) | 10 cm x 10 cm x 10 cm |
| Weight | 0.13 kg |
| DIY Supplies | Electrical |
| Origin | Mainland China |
8. User Tips
- Battery Verification: For users in Australia and other regions, please verify the specific model of your Ferrex 20V battery to ensure compatibility before purchasing or using the adapter, as some regional models may differ.
- Optimal Charging: Always use a fully charged Ferrex 20V battery for the best charging performance for your mobile devices.
9. Warranty and Support
For any questions, technical support, or warranty inquiries regarding your Ferrex 20V Li-ion Battery USB Power Bank Adapter, please contact the seller or manufacturer directly. Keep your purchase receipt as proof of purchase.





