1. Introduction
The TrustFire UC10 is a compact, lightweight, and efficient magnetic charging and discharging integrated charger designed for various Li-ion batteries. It features a power bank function, allowing you to charge other electronic devices in emergencies. This manual provides detailed instructions for safe and effective use of your UC10 charger.
2. Safety Information
- Always ensure correct battery polarity (+ to + and - to -) when connecting the battery to the charger. Incorrect connection will cause the red indicator light to flash, signaling a fault.
- Remove the battery promptly after charging is complete to prevent slight power consumption by the indicator.
- Do not attempt to charge non-rechargeable batteries.
- Avoid short-circuiting the magnetic contacts.
- Keep the charger away from water and extreme temperatures.
- Do not disassemble or modify the charger.
- Use only compatible Li-ion batteries with voltages ranging from 3.6V to 4.2V.
3. Package Contents
- 1 x TrustFire UC10 Battery Charger
- 1 x User Manual

4. Product Overview
The TrustFire UC10 features a USB-A plug for power input/output and two magnetic contacts for connecting to batteries. An LED indicator provides status feedback.


5. Specifications
| Attribute | Value |
|---|---|
| Model | UC10 |
| Certification | CE, ROHS, FCC |
| Input Voltage | 5V/1A |
| Max Charging Current | 1000mA (Max 1.2A) |
| Output to Battery | 4.2V/1A (Max 1.2A) |
| Power Bank Output | 5V/1A |
| Charge Battery Type | Li-ion (3.7V-4.2V) |
| Compatible Battery Sizes | 32650, 26700, 26650, 26500, 25500, 22700, 22650, 22500, 21700, 20700, 18700, 18650, 18500, 18490, 18350, 17700, 17670, 17650, 17500, 16650, RCR123, 16340, 17350, 16500, 14650, 14500, 14430, 14350 |
| Weight | 18.2g (excluding packaging) |
| Dimensions (L*W*H) | 170mm * 20mm * 9mm |
| Working Temperature | -20℃ to 50℃ |
| Working Humidity | 5% (0℃) - 90% (40℃) |


6. Setup and Operation
6.1. Charging Batteries
- Connect to Power Source: Plug the USB-A end of the UC10 charger into a compatible 5V/1A USB power source, such as a mobile power supply, car charger, or laptop computer.
- Attach Battery: Carefully attach the magnetic contacts to your Li-ion battery. Ensure the positive (+) contact aligns with the battery's positive terminal and the negative (-) contact aligns with the battery's negative terminal. The magnetic contacts are designed for easy and secure attachment.
- Monitor Indicator: The LED indicator on the charger will show the charging status (see Section 7 for details).
- Remove Battery: Once the battery is fully charged (Green Light), disconnect the battery from the charger and unplug the charger from the power source.

6.2. Discharging (Power Bank Function)
The UC10 can act as a power bank to charge other electronic devices using a charged Li-ion battery.
- Connect Battery: Ensure a charged Li-ion battery is correctly connected to the magnetic contacts of the UC10 charger.
- Connect External Device: Plug your electronic device (e.g., smartphone) into the USB-A output port of the UC10 charger using its charging cable.
- Monitor Indicator: The LED indicator will show the discharge status (see Section 7 for details).
- Disconnect: Once your device is sufficiently charged or the battery in the UC10 is depleted, disconnect the device and the battery.

6.3. Product Demonstration Video
7. Power Indicator Guide
7.1. During Charging
- Red Light: Charging in progress.
- Green Light: Battery is fully charged.
- Red Flashing (1Hz): Indicates battery reverse connection or a charger fault. Disconnect power and re-install the battery with correct polarity.
7.2. During Discharging (Power Bank Function)
- Green Light: Charging the connected electronic device.
- Red Light: Low battery (40% - 20% remaining capacity).
- Red Flashing (5Hz): Battery is running out (20% - 0% remaining capacity).


8. Protection Features
The TrustFire UC10 charger incorporates multiple safety features to ensure reliable and safe operation:
- Reverse Connection Protection: Prevents damage if the battery is connected with incorrect polarity. The indicator will flash red.
- Overcharge Protection: Automatically stops charging when the battery reaches its maximum constant voltage of 4.2V.
- Short Circuit Protection: Protects against short circuits between positive and negative terminals (generates a 90mA detection current).
- 0V Activation Function: Can activate batteries with a protection plate that have been over-discharged to 0V.
- Temperature Protection: Monitors and regulates internal temperature to prevent overheating.
- Over-Current Protection: Safeguards against excessive current flow.
- Over-Volt Protection: Protects against over-voltage conditions.

9. Charging Time Table
The following table provides approximate charging times for various battery capacities. Note that actual charging times may vary based on battery condition, environment, and power source.
| Battery Type | Battery Capacity (mAh) | Charging Current (mA) | Charging Time (hours) |
|---|---|---|---|
| 16340 | 700mAh | 1000mA | 1.2 hrs |
| 18650 | 2600mAh | 1000mA | 3.2 hrs |
| 18650 | 3000mAh | 1000mA | 4.2 hrs |
| 20700 | 3100mAh | 1000mA | 4.5 hrs |
| 21700 | 4000mAh | 1000mA | 5.3 hrs |
| 26650 | 5000mAh | 1000mA | 6.5 hrs |

10. Maintenance
- Keep the charger clean and dry. Wipe with a soft, dry cloth if necessary.
- Store the charger in a cool, dry place away from direct sunlight and extreme temperatures.
- Avoid dropping or subjecting the charger to strong impacts.
- Ensure the magnetic contacts are free from debris to maintain good connection.
11. Troubleshooting
- Charger indicator flashes red (1Hz) during charging: This indicates incorrect battery polarity or a faulty battery. Disconnect the power, check the battery's positive and negative terminals, and re-connect correctly. If the issue persists, try a different battery.
- No indicator light when connected to power: Ensure the USB power source is active and providing 5V/1A. Check the USB connection for looseness.
- Battery not charging: Verify the battery is a compatible Li-ion type (3.6V-4.2V). Ensure the magnetic contacts are clean and making good contact with the battery terminals.
- Power bank function not working: Ensure the Li-ion battery connected to the UC10 is sufficiently charged. Check the connection to the external device.
12. User Tips
- Always double-check the battery type and voltage before charging to ensure compatibility with the UC10 charger.
- For optimal charging and discharging performance, use high-quality Li-ion batteries within the specified voltage range.
13. Warranty and Support
The TrustFire UC10 Magnetic Battery Charger comes with a 3-year warranty from the date of purchase.
For technical support, warranty claims, or any inquiries, please contact TrustFire customer service:
- Email: sales@trustfire.com
- Tel/V/WhatsApp: +86 18129831271





