1. Introduction and Overview
Thank you for choosing the INIU 18W PD QC 20000mAh USB C Portable Power Bank. This compact and powerful device is designed to keep your electronic devices charged on the go, offering fast and safe charging solutions. With its high-capacity battery and versatile charging ports, it is an essential accessory for modern mobile lifestyles.
Key features include:
- Safe Fast Charge Pro: Engineered with advanced safety standards for reliable charging.
- 18W Fast Charging: Capable of charging devices like an iPhone 13 from 0% to 50% in approximately 25 minutes.
- Compact 20000mAh Design: Measuring 5.3 x 2.7 x 1.0 inches and weighing 12.3 ounces, it is designed for portability.
- USB-C In & Out Port: Features a versatile USB-C port for both recharging the power bank and charging compatible devices.
- 7 Days of Power: Provides multiple charges for your devices throughout the week.
- Charge Three Devices Simultaneously: Equipped with one USB-C port and two USB-A ports.
- Wide Compatibility: Supports charging for a broad range of devices, including smartphones, tablets, AirPods, Bluetooth headphones, fitness trackers, and smartwatches.
- Airline Approved: Suitable for air travel.
2. Package Contents
Upon opening your INIU Portable Charger package, you should find the following items:
- INIU 20000mAh Portable Charger (Model: BI-B42)
- USB-C Charging Cable
- Travel Pouch
- User Manual (this document)

Image: The image displays all items included in the INIU Portable Charger package: the power bank itself, a USB-C charging cable, a protective travel pouch, and the user manual.
3. Setup and Initial Use
3.1 Charging the Power Bank
Before first use, fully charge your INIU Portable Power Bank. Use the provided USB-C cable and connect it to a compatible power adapter (not included). The paw print LED indicator will illuminate to show the charging status. Each 'toe' of the paw represents approximately 20% of the battery capacity. When all five 'toes' are steadily lit, the power bank is fully charged.

Image: The power bank is shown connected to a wall adapter for recharging, with its paw print indicator glowing.
3.2 Power Level Indicator
Press the power button once to check the current battery level. The illuminated 'toes' on the paw print indicate the remaining charge:
- 1 Toe: 0-20%
- 2 Toes: 21-40%
- 3 Toes: 41-60%
- 4 Toes: 61-80%
- 5 Toes: 81-100%
4. Operating Instructions
4.1 Charging Your Devices
To charge your device, connect it to one of the power bank's output ports using a compatible USB cable. The power bank features:
- 1 x USB-C In/Out Port (18W)
- 2 x USB-A Output Ports (OUT1: 18W, OUT2: 15W)
The power bank will automatically detect and begin charging your device. You can charge up to three devices simultaneously.

Image: The INIU Portable Charger is shown connected via a USB-C cable to a smartphone, illustrating its fast-charging capability. The power bank features a paw print LED indicator.

Image: The image demonstrates the INIU Portable Charger's ability to charge three devices concurrently, including a smartphone and a tablet, showcasing its multi-device charging capability.
4.2 Using the Built-in Flashlight
To turn on the flashlight, double-press the power button. Double-press again to turn it off.

Image: This composite image highlights two features: the top part shows the power bank being used on an airplane, indicating it's airline-approved. The bottom part shows a person utilizing the integrated flashlight in a low-light environment.
5. Maintenance
To ensure the longevity and optimal performance of your INIU Portable Power Bank, follow these maintenance guidelines:
- Keep the device dry and away from moisture.
- Avoid extreme temperatures (hot or cold).
- Clean the exterior with a soft, dry cloth. Do not use harsh chemicals or abrasive materials.
- Store in a cool, dry place when not in use.
- Avoid dropping or subjecting the device to strong impacts.
6. Troubleshooting
If you encounter issues with your INIU Portable Power Bank, please refer to the following common troubleshooting steps:
- Device not charging: Ensure the power bank is charged. Check that the charging cable is securely connected to both the power bank and your device. Try a different cable or port.
- Power bank not recharging: Verify that the USB-C cable is properly connected to a working power source and the power bank's input port. Try a different wall adapter or cable.
- Slow charging: Ensure you are using a fast-charging compatible cable and adapter. Some devices may have specific charging requirements.
- Flashlight not working: Double-press the power button firmly to activate or deactivate the flashlight.
If problems persist, please contact INIU customer support for assistance.
7. Specifications
| Feature | Detail |
|---|---|
| Model Number | BI-B42 |
| Battery Capacity | 20000 Milliamp Hours |
| Product Dimensions | 5.3 x 2.7 x 1 inches |
| Item Weight | 12.8 ounces |
| Connector Type | USB Type A, USB Type C |
| Voltage | 5 Volts |
| Special Features | Fast Charge, Portable Charger |
| Batteries | 1 Lithium Polymer batteries (included) |
8. Warranty and Support
INIU stands behind the quality of its products. Your INIU 20000mAh Portable Charger comes with:
- 30-Day Money-Back Guarantee: If you are not satisfied with your purchase, you may return it within 30 days for a full refund.
- INIU Industry-Leading 3-Year Warranty: Provides coverage against manufacturing defects and malfunctions for three years from the date of purchase.
- Lifetime Technical Support: Access to dedicated technical support for any questions or issues you may encounter with your device.
For warranty claims or technical assistance, please visit the official INIU website or contact their customer service directly.







