1. Introduction
Thank you for choosing the HELLEE 15000mAh Portable Charger. This device is designed to provide reliable and efficient power for your electronic devices on the go. Featuring a high-capacity battery, fast charging capabilities, and multiple built-in cables, it offers a convenient solution for keeping your devices powered wherever you are.
Please read this manual thoroughly before using the product to ensure safe and optimal performance.
2. Product Overview
The HELLEE 15000mAh Portable Charger (Model N18) is a compact and versatile power bank equipped with multiple charging options. It includes integrated cables for various device types, eliminating the need to carry extra cords.

Figure 1: Front view of the HELLEE Portable Charger with built-in cables.
Key Features:
- Multi-Device Charging: Integrated USB-A, Type-C, iOS, and Micro USB cables for broad compatibility.
- Fast 22.5W Charging: Provides rapid power delivery to compatible devices.
- Simultaneous Charging: Capable of charging up to 6 devices concurrently using its 6 output and 3 input ports.
- Compact and Portable: Lightweight design for easy transport in pockets, backpacks, or handbags.
- Smart LED Display: Real-time battery percentage and charging status monitoring.
- Air Travel Approved: Designed with safety features and compliant with airline regulations.
3. Setup and Initial Use
3.1 Charging the Power Bank
Before first use, fully charge the power bank. Connect the power bank to a suitable power adapter using its built-in USB-A input cable or the Type-C input port. The LED display will show the charging progress.

Figure 2: Charging the power bank using its integrated USB-A cable.
3.2 Checking Battery Level
Press the power button once to activate the LED display, which will show the current battery percentage. This allows you to monitor the remaining power.
Video 1: Official product video demonstrating the HELLEE Power Bank's features, including the LED display and built-in cables.
4. Operating Instructions
4.1 Charging Devices
To charge a device, pull out the appropriate built-in cable (USB-A, Type-C, iOS, or Micro USB) and connect it to your device. The power bank will automatically begin charging. For devices requiring a standard USB-A or Type-C port, use the external ports on the power bank.

Figure 3: The power bank charging multiple devices simultaneously.
4.2 Using Built-in Cables
- USB-A Cable: For charging the power bank itself.
- iOS Cable: Compatible with iPhone 16/15/14/13/12 and other Apple devices.
- Type-C Cable: Compatible with modern Android phones (Samsung, Google Pixel), iPads, and other Type-C devices. This port also supports bi-directional charging.
- Micro USB Cable: Compatible with older Android devices, headphones, and other Micro USB accessories.

Figure 4: Detail of the built-in charging cables.
5. Maintenance and Care
- Keep the power bank away from water, moisture, and extreme temperatures.
- Avoid dropping or subjecting the device to strong impacts.
- Clean the exterior with a soft, dry cloth. Do not use harsh chemicals.
- Store in a cool, dry place when not in use.
- For optimal battery life, fully charge and discharge the power bank at least once every three months if stored for extended periods.
6. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Power bank not charging | Charging cable or adapter faulty; power bank battery depleted. | Try a different charging cable and adapter. Ensure the power bank is connected to a working power source. |
| Device not charging from power bank | Power bank battery low; incorrect cable used; device not compatible. | Check power bank battery level. Ensure the correct built-in cable or external port is used for your device. Verify device compatibility. |
| Slow charging | Non-fast charging cable/adapter; multiple devices charging simultaneously. | Use a fast-charging compatible cable and adapter. Charging multiple devices may reduce individual charging speeds. |
| LED display not working | Power button not pressed; device malfunction. | Press the power button once. If the issue persists, contact customer support. |
7. Safety Information
This power bank is designed with multiple safety features to protect both the device and your electronics. It includes built-in protections against overcharging, overheating, over-voltage, and overcurrent. The device is also constructed with fire-resistant materials.
Air Travel Safety:
The HELLEE 15000mAh Portable Charger complies with airline safety regulations for carry-on luggage. Always check with your airline for their specific policies regarding portable power banks before traveling.

Figure 5: The power bank is safe for air travel.
8. Specifications
| Feature | Detail |
|---|---|
| Model Number | N18 |
| Battery Capacity | 15000 Milliamp Hours (mAh) |
| Product Dimensions | 4.57 x 0.87 x 2.76 inches |
| Item Weight | 8.4 ounces |
| Fast Charging Output | 22.5W (Max) |
| Output Ports | Built-in USB-A, Type-C, iOS, Micro USB cables; 2 external USB-A ports; 1 external Type-C port (bi-directional) |
| Input Ports | Built-in USB-A cable; 1 external Type-C port (bi-directional) |
| Special Features | Built-in cables, LED display, Multi-protection safety system |
9. Warranty and Support
For warranty information and customer support, please refer to the product packaging or contact HELLEE customer service directly. Keep your purchase receipt as proof of purchase.
Manufacturer: Anshi Shengying (Shenzhen) Technology Co., Ltd.