1. Introduction
Thank you for choosing the ZMI QB826G 210W High Power 25000mAh Power Bank. This device is designed to provide powerful and efficient charging for a wide range of electronic devices, including laptops, smartphones, tablets, and gaming consoles. With its large capacity and multiple fast-charging ports, it ensures your devices stay powered on the go.
Figure 1: ZMI QB826G Power Bank Overview
2. Package Contents
Please check the package for the following items:
- ZMI 20 Mobile Power Bank (QB826G) x 1
- USB-A to USB-C Charging Cable x 1
- USB-C to USB-C Charging Cable x 1
- Instruction Manual x 1
Figure 2: Package Contents
3. Specifications
| Feature | Detail (QB826G) |
|---|---|
| Product Name | ZMI 20 Mobile Power |
| Model | QB826G |
| Battery Type | Lithium-ion battery (21700 cells) |
| Battery Energy (Rated/Typical) | 88.9Wh / 90.7Wh 3.63V (24500mAh / 25000mAh) |
| Rated Capacity | 14000mAh (5V/6A) |
| Input Interface | USB-C (x2) |
| Output Interface | USB-A (x1), USB-C (x2) |
| Input Parameters (USB-C1) | 5V/3A, 9V/3A, 12V/3A, 15V/3A, 20V/5A (100W MAX) |
| Input Parameters (USB-C2) | 5V/3A, 9V/3A, 12V/3A, 15V/3A, 20V/2.25A (45W MAX) |
| Output Parameters (Total) | 210W MAX |
| Output Parameters (USB-C1) | 5V/3A, 9V/3A, 12V/3A, 15V/3A, 20V/5A (100W MAX) |
| Output Parameters (USB-C2) | 5V/2.4A, 9V/3A, 12V/3A, 15V/3A, 20V/5A (100W MAX)* |
| Output Parameters (USB-A) | 5V/3A, 9V/3A, 12V/3A, 15V/3A, 20V/2.25A (45W MAX) |
| Three-Port Simultaneous Output | 5V/6A, 9V/6A, 12V/6A, 15V/6A, 20V/10.5A (210W MAX) |
| Dimensions | 188.6 x 80.4 x 27.1 mm |
| Operating Temperature | 5°C - 35°C |
| Self-Charging Time | Approx. 2.5 hours (with 65W+ charger and included USB-C to USB-C cable) |
*Note: USB-C2 output can reach 100W MAX with specific devices like Xiaomi 10 Supreme Commemorative Edition using its original 100W cable.
Figure 3: Key Specifications and Port Layout
4. Key Features
- Ultra-High Power Output: Delivers a total maximum output of 210W, capable of fast-charging multiple high-power devices simultaneously.
- Massive Capacity: 25000mAh battery ensures extended power for all your gadgets.
- Flight-Friendly Design: Complies with international aviation standards, allowing it to be carried on flights.
- Triple Fast Charging Ports: Features two USB-C ports (up to 100W MAX each) and one USB-A port (up to 120W MAX for compatible devices), all with independent fast-charging circuits.
- Rapid Self-Charging: Can be recharged to 60% in just 1 hour and fully charged in approximately 2.5 hours with a 65W or higher power delivery charger.
- Multi-Protocol Compatibility: Supports various mainstream fast-charging protocols for broad device compatibility.
- LED Digital Display: Provides a clear, real-time display of the remaining battery percentage.
- Advanced Safety Protections: Equipped with high-quality circuit chips and multiple safety mechanisms including temperature protection, short-circuit protection, input/output overvoltage protection, input/output overcurrent protection, and battery overcharge/discharge protection.
- Multi-directional Temperature Control: Incorporates 5 NTC sensors for comprehensive temperature monitoring and protection.
- Premium Build: Features a sleek design with a durable CD-pattern button for a metallic feel.
Figure 4: Key Features Summary
5. Setup and Initial Charging
5.1 Initial Charging of the Power Bank
- Use the included USB-C to USB-C cable.
- Connect one end of the USB-C cable to either USB-C input port (IN1 or IN2) on the power bank.
- Connect the other end of the USB-C cable to a compatible USB-C power adapter (65W or higher recommended for fastest charging).
- The LED digital display will show the charging progress. A full charge takes approximately 2.5 hours with a 65W+ charger.
Figure 5: Power Bank Self-Charging
5.2 Understanding the LED Display
The integrated LED digital display shows the current battery percentage of the power bank, allowing you to easily monitor its charge level.
Figure 6: LED Digital Display
6. Operating Instructions
6.1 Charging Devices
- Connect your device's charging cable to the appropriate output port on the power bank (USB-C1, USB-C2, or USB-A).
- Connect the other end of the cable to your device.
- The power bank will automatically begin charging your device. The LED display will show the power bank's remaining charge.
- You can charge up to three devices simultaneously.
Figure 7: Simultaneous Device Charging
6.2 Low Current Charging Mode
For small devices like Bluetooth headphones, smartwatches, or fitness trackers that require low current charging:
- Double-click the power button on the side of the power bank.
- The power bank will enter low current charging mode, indicated by a specific icon or change on the LED display (refer to the display for confirmation).
- Connect your low-power device to any output port.
- To exit low current charging mode, double-click the power button again or disconnect all devices.
Figure 8: Low Current Charging for Small Devices
7. Device Compatibility
The ZMI QB826G supports a wide range of devices, including:
- Laptops (e.g., MacBook Pro, MacBook Air, Dell XPS, Lenovo ThinkPad, HP Spectre, Xiaomi Notebook Air)
- Smartphones (e.g., iPhone, Xiaomi, Redmi, Samsung)
- Tablets (e.g., iPad Pro)
- Gaming devices (e.g., Nintendo Switch, PS5 controllers)
- Other devices (e.g., GoPro, MINI drones, Bluetooth headphones, smart bands)
7.1 Laptop Compatibility (Partial List)
| Brand | Model |
|---|---|
| Acer | Swift7 2019 |
| Apple | MacBook Air M1 2020 (A2337), MacBook Air 13 2020 (A2179), MacBook Air 13 2018 (A1932), MacBook Air 13 2015 (A1534), MacBook Pro 16 2019 (A2141), MacBook Pro 13 2019 (A2159), MacBook Pro 15 2018 (A1990), MacBook Pro 15 2017 (A1708), MacBook Pro 13 2017 (A1706), MacBook Pro 13 2016 (MLL42), MacBook Pro 13 2016 (A1706) |
| ASUS | 灵焕3 Pro 12.6" (T303UA) |
| Dell | XPS 13 2 in 1 (9365), XPS 13 (9370), Latitude 5480, XPS 15 (9560) |
| Google Pixelbook Go, Pixelbook | |
| Honor | MagicBook 14" 2018 |
| HP | EliteBook Folio G1 12.5, Spectre 13-af001, Spectre x360 13-w021TU 13.3, ZHAN 66 Pro 14 G3 |
| Huawei | MateBook X Pro, MateBook X 13, MateBook E |
| Lenovo | ThinkPad S3-490 14", ThinkPad X270 12.5", XiaoXin Pro 13 2020, ThinkPad T470 (1FCD), ThinkPad New S2 13.3 |
| LG | gram 15.6 |
| Microsoft | Surface Pro 7 |
| Razer | Blade Stealth 13 |
| Samsung | Chrome Book Plus (XE513C24) |
| Xiaomi | 小米笔记本Pro 15 增强版(181501-AQ), 小米笔记本Pro 15.6" (171501-FE), 小米笔记本Air 13(161301-FF), 小米笔记本Air 12(161201-YC) |
| Redmi | RedmiBook 16 锐龙版(MXA2002-AB), RedmiBook 14 锐龙版(MXA2001-AJ), RedmiBook 14 II (XMA2011-CF) |
Note: This compatibility list is not exhaustive. Compatibility may vary with software versions. Devices not listed may still be supported.
Figure 9: Laptop Compatibility
Figure 10: Charging Gaming and Other Devices
8. Safety Precautions
- Do not expose the power bank to extreme temperatures (above 35°C or below 5°C), direct sunlight, or fire.
- Avoid dropping, disassembling, or modifying the device.
- Keep away from water and other liquids.
- Use only original or certified charging cables and adapters.
- Do not use if the power bank is damaged, swollen, or leaking.
- Keep out of reach of children.
- The power bank features multiple built-in protections:
- Temperature Protection
- Short Circuit Protection
- Reset Protection
- Input Overvoltage Protection
- Input Overcurrent Protection
- Output Overcurrent Protection
- Output Overvoltage Protection
- Battery Overcharge/Discharge Protection
- Hardware-level Battery Overcurrent Short Circuit Protection
- Flight Compatibility: The 25000mAh (90.7Wh) capacity is generally compliant with international aviation standards for carry-on luggage. Always check with your airline before travel.
Figure 11: Multiple Safety Protections
Figure 12: Multi-directional Temperature Protection
9. 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 when not in use.
- For optimal battery life, avoid fully discharging the power bank frequently. Recharge it when the battery level is low.
- If storing for an extended period, charge the power bank to about 50-70% and recharge every 3-6 months to prevent deep discharge.
10. Troubleshooting
- Device not charging:
- Ensure the power bank has sufficient charge.
- Check if the charging cable is securely connected to both the power bank and your device.
- Try a different charging cable or port.
- Ensure your device is compatible with the power bank's output specifications.
- Power bank not charging:
- Ensure the charging cable is securely connected to both the power bank and the wall adapter.
- Try a different wall adapter or power outlet.
- Ensure the wall adapter provides sufficient power (65W or higher recommended).
- Try a different USB-C input port on the power bank.
- Slow charging:
- Ensure you are using a fast-charging compatible cable and adapter.
- Some devices may limit charging speed if they are too hot or cold.
- Charging multiple devices simultaneously may distribute power, potentially reducing individual device charging speeds.
- LED display not working:
- Press the power button once to activate the display.
- If the issue persists, the power bank may be fully discharged or require service.
11. User Tips
- For the fastest charging of the power bank itself, use a 65W or higher USB-C Power Delivery (PD) charger and the included USB-C to USB-C cable.
- When charging high-power devices like laptops, use the USB-C1 port for up to 100W output.
- If your Xiaomi phone supports 120W fast charging (e.g., MIX 4, Xiaomi 10 Supreme), use the USB-A port with the appropriate original cable for optimal speed.
- Remember to activate low current charging mode (double-click power button) for small accessories to prevent overcharging or damage.
- Always carry the power bank in a protective case to prevent scratches and minor impacts.
12. Warranty and Support
ZMI provides an 18-month quality guarantee for this product from the date of purchase. During this period, if any non-human quality issues arise, you may be eligible for replacement or repair services. Please consult customer service for detailed terms and conditions.
- Quality Guarantee: 18 months from purchase date.
- Return Policy: 7 days no-reason return.
- Replacement Policy: 15 days free replacement.
- Repair Policy: 18 months free repair.
*Note: Replacement/repair services are subject to product inspection. Damage caused by human factors, such as scratches, dents, or wear and tear, are not covered under the free replacement/repair policy.
Figure 13: Warranty Information
