1. Introduction
Thank you for choosing the YILANS JM4 Pro Portable Charger. This manual provides essential information for the safe and efficient operation of your power bank. Please read it thoroughly before use and retain it for future reference.
2. Product Overview
The YILANS JM4 Pro is a high-capacity portable power bank designed to charge multiple devices simultaneously with its built-in cables and various output ports. It features fast charging capabilities and a digital LED display for battery status.
Key Features:
- 42800mAh High Capacity: Provides multiple charges for smartphones and other devices.
- Built-in Cables: Includes Type-C, iOS (Lightning), Micro USB, and USB-A cables for universal compatibility.
- 22.5W PD Fast Charging: Supports Power Delivery (PD 3.0) and Quick Charge (QC3.0/4.0) for rapid charging.
- Multiple Outputs: Features 6 output options (3 built-in cables + 3 ports) to charge up to 6 devices concurrently.
- Digital LED Display: Accurately shows remaining battery percentage.
- Compact Design: Portable form factor for travel and daily use.
- Advanced Safety Protection: Built-in safeguards against overcharge, overvoltage, overcurrent, and short-circuit.
3. Components
The YILANS JM4 Pro includes the following components:
- YILANS JM4 Pro Portable Charger
- Built-in USB-A input cable
- Built-in Type-C output cable
- Built-in iOS (Lightning) output cable
- Built-in Micro USB output cable
- 1 x Bi-directional Type-C port (Input/Output)
- 2 x USB-A output ports
- Digital LED display
- USB-C Cable for Recharging Portable Charger (included in package)
4. Setup
Before first use, it is recommended to fully charge your YILANS JM4 Pro Portable Charger.
Initial Charging:
- Connect the power bank to a wall charger (not included) using the provided USB-C cable or the built-in USB-A input cable.
- The digital LED display will show the charging progress, indicating the battery percentage.
- Charge until the display shows "100%" for optimal performance.
5. Operating Instructions
5.1 Charging the Power Bank
To recharge your YILANS JM4 Pro:
- Using Built-in USB-A Cable: Plug the built-in USB-A cable into a USB wall adapter or computer USB port.
- Using Type-C Port: Connect a USB-C to USB-C cable (or the included USB-C cable) from a compatible wall adapter to the power bank's bi-directional Type-C port.
The LED display will show the current battery level during charging. A full charge may take several hours depending on the power source.
5.2 Charging Your Devices
The YILANS JM4 Pro can charge up to 6 devices simultaneously.
- Identify the correct cable or port for your device.
- For Built-in Cables: Pull out the appropriate built-in cable (Type-C, iOS, or Micro USB) and connect it directly to your device.
- For USB-A Ports: Use your device's original USB charging cable and plug the USB-A end into one of the power bank's USB-A output ports.
- For Type-C Port: Use a USB-C to USB-C cable to connect your device to the power bank's bi-directional Type-C port.
- The power bank will automatically begin charging your device. The LED display will show the remaining battery level.
The 22.5W PD fast charging technology ensures efficient power delivery to compatible devices, significantly reducing charging time.
5.3 LED Display
The digital LED display shows the remaining battery percentage of the power bank. This allows you to monitor the power level and plan your charging needs effectively.
6. Maintenance
Proper maintenance ensures the longevity and optimal performance of your power bank.
- Cleaning: Wipe the power bank with a soft, dry cloth. Do not use harsh chemicals or abrasive materials.
- Storage: Store the power bank in a cool, dry place away from direct sunlight, extreme temperatures, and humidity.
- Regular Use: If not used for extended periods, charge and discharge the power bank at least once every three months to maintain battery health.
- Avoid Drops: Protect the device from drops and impacts.
7. Troubleshooting
If you encounter issues with your YILANS JM4 Pro, refer to the following common problems and solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| Power bank not charging | Low battery; faulty cable/adapter; loose connection | Ensure power bank is connected to a working power source. Try a different charging cable or wall adapter. Check connections. |
| Device not charging from power bank | Power bank low on charge; incompatible cable; device not properly connected | Recharge the power bank. Ensure the correct built-in cable or external cable is used and securely connected. Check device compatibility. |
| Slow charging | Non-fast charging cable/adapter; multiple devices charging simultaneously | Use a fast-charging compatible cable and wall adapter. Charging multiple devices may reduce individual charging speeds. |
| LED display not working | Power bank completely discharged; internal fault | Attempt to charge the power bank for an extended period. If the issue persists, contact customer support. |
If the problem persists after trying these solutions, please contact YILANS customer support.
8. Specifications
| Feature | Specification |
|---|---|
| Model Number | JM4 Pro |
| Battery Capacity | 42800mAh (42799.98 Milliamp Hours) |
| Battery Cell Composition | Lithium Polymer |
| Product Dimensions | 5.61 x 2.88 x 1.12 inches |
| Item Weight | 1.21 pounds (503.2g) |
| Input Ports | Built-in USB-A cable, Bi-directional Type-C port |
| Output Ports | Built-in Type-C, iOS (Lightning), Micro USB cables; 2 x USB-A ports; Bi-directional Type-C port |
| Fast Charging Support | PD 3.0, QC3.0/4.0 (up to 22.5W) |
| Recommended Uses | Indoor/Outdoor |
| Manufacturer | Shenzhen Zihao technology Co., LTD |
9. Safety Information
Please observe the following safety precautions to prevent damage to the product or injury to yourself:
- Do not expose the power bank to water, moisture, or extreme temperatures.
- Do not disassemble, modify, or attempt to repair the device.
- Keep out of reach of children.
- Avoid dropping or subjecting the power bank to strong impacts.
- Do not use if the power bank is visibly damaged, swollen, or leaking.
- Use only compatible charging cables and adapters.
- Dispose of the power bank responsibly according to local regulations.
10. Warranty and Support
YILANS is committed to providing high-quality products and customer satisfaction.
Warranty Information:
This product is covered by a standard manufacturer's warranty. Please refer to your purchase documentation for specific warranty terms and conditions.
Customer Support:
For any questions, technical assistance, or warranty claims, please contact YILANS customer support. We offer 7*24 hour support and a 365-day return service for eligible issues.
You can typically find contact information on the YILANS official website or through your purchase platform.