1. Introduction
Thank you for choosing the Euker 40000mAh 100W Portable Power Bank. This high-capacity power bank is designed to provide reliable and fast charging for a wide range of devices, including laptops, smartphones, and tablets. Featuring a transparent design, smart IPS display, multiple charging ports, and IP67 waterproof rating, it is an ideal companion for both daily use and outdoor adventures. Please read this manual thoroughly before using the product to ensure safe and optimal performance.
2. Safety Information
- Do not expose the power bank to extreme temperatures (above 60°C/140°F or below -10°C/14°F).
- Avoid dropping, disassembling, or attempting to repair the device yourself.
- Keep away from water and liquids, especially when the waterproof plug is not securely closed.
- Use only certified charging cables and adapters.
- Keep out of reach of children.
- Do not short-circuit the charging ports.
- Dispose of the power bank according to local regulations; do not dispose of it in household waste.
- For water sports, ensure the waterproof plug is covered in advance.
3. Package Contents
Please check the package for the following items:
- Euker 40000mAh 100W Portable Power Bank
- USB-C to USB-C Charging Cable (100W compatible)
- User Manual
4. Product Overview
The Euker Power Bank features a unique transparent design, allowing visibility of its internal components. It is equipped with multiple ports and an intelligent IPS display for real-time information.

Figure 4.1: Euker 40000mAh 100W Portable Power Bank. This image shows the power bank from a side angle, highlighting its transparent casing, integrated handle, and the visible internal components including the ports and IPS screen.

Figure 4.2: Smart IPS Display Screen. This close-up image details the information presented on the IPS screen, including battery percentage, output power, voltage, current, chip temperature, battery temperature, working time, and active ports.
4.1 Ports and Indicators
- USB-C1 Port: PD 100W Bi-directional (Input/Output)
- USB-C2 Port: PD 30W Output
- USB-A1 Port: 18W Output
- USB-A2 Port: 18W Output
- IPS Display Screen: Shows battery level, output power, temperatures, and working time.
- LED Flashlight: Multi-mode flashlight function.
5. Setup
5.1 Initial Charging of the Power Bank
Before first use, it is recommended to fully charge your Euker Power Bank. Use a PD 100W compatible charger (not included) and the provided USB-C to USB-C cable for the fastest charging experience.
- Connect the USB-C to USB-C cable to the USB-C1 port on the power bank.
- Connect the other end of the cable to a PD 100W compatible wall charger.
- The IPS display will show the charging status and estimated time to full charge. A full charge takes approximately 180 minutes with a 100W charger.

Figure 5.1: Power Bank Charging a Laptop. This image illustrates the power bank connected via a USB-C cable to a laptop, demonstrating its 100W fast charging capability.
6. Operating Instructions
6.1 Charging Your Devices
The Euker Power Bank can charge up to four devices simultaneously.
- Connect your device's charging cable to the appropriate port on the power bank (USB-C1, USB-C2, USB-A1, or USB-A2).
- The IPS display will automatically show the output power and charging status for each connected device.
- For optimal fast charging, use the USB-C1 port with compatible devices and cables.

Figure 6.1: Charging Multiple Devices. This diagram shows the power bank connected to a laptop, tablet, and two smartphones, illustrating its ability to charge four devices concurrently with varying power outputs.
6.2 Using the IPS Display
The smart IPS display provides comprehensive real-time information:
- Battery Power: Current charge percentage.
- Output Power: Total power being delivered to devices.
- Chip Operating Temperature: Internal chip temperature.
- Battery Working Temperature: Battery cell temperature.
- Working Time: Duration of current charging/discharging cycle.
- Working Ports: Indicates which ports are actively in use.
6.3 LED Flashlight Function
The power bank includes a versatile LED flashlight with five modes:
- Low Brightness
- Normal Brightness
- High Brightness
- Long-Range
- SOS Flashing
To activate or cycle through modes, press the dedicated flashlight button. This feature is useful for camping, emergencies, or low-light conditions.

Figure 6.2: LED Flashlight Modes. This image demonstrates the five different lighting modes of the integrated LED flashlight, including weak light, normal light, strong light, high beam, and SOS flashing.
6.4 IP67 Waterproof Rating
The Euker Power Bank is rated IP67, meaning it is protected from dust ingress and can withstand immersion in water up to 1 meter for 30 minutes. This makes it suitable for outdoor and aquatic environments.
Important Note:
- Ensure all port covers and the waterproof plug are securely closed before exposing the power bank to water.
- While IP67 rated, prolonged submersion or exposure to high-pressure water jets is not recommended.

Figure 6.3: IP67 Waterproof Feature. This image shows the power bank being splashed with water, illustrating its IP67 waterproof and dustproof capabilities.
7. Maintenance
- Clean the power bank with a soft, dry cloth. Do not use harsh chemicals or abrasive materials.
- Store the power bank in a cool, dry place away from direct sunlight and extreme temperatures.
- If storing for extended periods, charge the power bank to approximately 50-70% every three months to preserve battery health.
8. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Power bank not charging | Cable or charger issue; power bank fully charged; faulty port. | Check cable and charger; ensure charger is PD 100W compatible; try a different port. |
| Device not charging from power bank | Cable issue; device not compatible; power bank depleted. | Try a different cable; ensure device is compatible with USB-C/USB-A; recharge power bank. |
| IPS display not working | Power bank off; internal issue. | Ensure power bank is on; contact customer support if issue persists. |
| Flashlight not working | Power bank off; button malfunction. | Ensure power bank is on; try pressing the flashlight button firmly. |
9. Specifications
| Feature | Detail |
|---|---|
| Model Number | PB4 (40000mAh-100W-A) |
| Battery Capacity | 40000mAh / 154Wh |
| USB-C1 Output/Input | PD 100W Max |
| USB-C2 Output | PD 30W Max |
| USB-A1/A2 Output | 18W Max (each) |
| Total Output | 100W Max |
| Dimensions | 6.5 x 3.82 x 4.41 inches |
| Item Weight | 2.4 pounds |
| Waterproof Rating | IP67 |
| Special Features | Digital Display, Fast Charging, Flashlight, Lightweight, See-Through Design |
9.1 Detailed Input/Output Information
The power distribution varies depending on the number of ports in use. Refer to the table below for detailed output information:

Figure 9.1: Detailed Input/Output Information. This table provides a comprehensive breakdown of power output configurations when using single or multiple ports simultaneously.
10. Warranty and Support
Euker products come with a standard manufacturer's warranty. For specific warranty terms and conditions, please refer to the warranty card included in your product packaging or visit the official Euker website.
If you encounter any issues or have questions regarding your Euker Power Bank, please contact Euker Customer Support. Contact information can typically be found on the product packaging or the official brand website.
Euker Official Store: Visit the Euker Store on Amazon





