1. Introduction
Thank you for choosing the Charmast 20000mAh Portable Charger. This power bank is designed to provide reliable and fast charging for a wide range of electronic devices, including smartphones, tablets, and more. With its high capacity, built-in cables, and multiple output options, it offers unparalleled convenience for your daily charging needs and travel. Please read this manual carefully to ensure proper use and maintenance of your device.
2. Important Safety Instructions
- Do not expose the power bank to extreme temperatures, direct sunlight, or high humidity.
- Do not disassemble, open, or attempt to repair the power bank yourself.
- Keep the power bank away from water and other liquids.
- Do not drop, hit, or subject the power bank to strong impacts.
- Use only certified charging cables and adapters to recharge the power bank.
- Keep out of reach of children.
- Dispose of the power bank according to local regulations. Do not dispose of it with household waste.
3. Package Contents
Please check the package for the following items:
- 1 x Charmast 20000mAh Portable Charger
- 1 x User Manual
- 1 x Travel Pouch
Image: The Charmast 20000mAh portable charger displayed alongside its retail box, user manual, and a grey travel pouch, illustrating the complete package contents.
4. Product Overview
Product Diagram
Image: A white Charmast 20000mAh portable charger showing its digital display, two USB output ports, and four built-in cables (USB-A, USB-C, Micro-USB, and Lightning) neatly tucked into its side.
Key Features
- 20000mAh High Capacity: Provides multiple charges for smartphones, tablets, and other devices.
- 4 Built-in Cables: Includes USB-C, Micro-USB, Lightning, and USB-A (for recharging the power bank) eliminating the need for extra cables.
- 6 Outputs: Charge up to 5 devices simultaneously using the built-in cables and additional USB-A and USB-C ports.
- 20W PD Fast Charging: Supports Power Delivery for rapid charging of compatible devices.
- LED Digital Display: Clearly shows the exact remaining battery percentage (0-100%).
- Ultra-Compact & Slim Design: Portable and lightweight for easy carrying.
5. Setup
Initial Charging of the Power Bank
Before first use, it is recommended to fully charge your Charmast portable charger. This ensures optimal performance and battery longevity.
- Connect the built-in USB-A cable or a USB-C cable to a compatible wall charger (18W PD/QC or above recommended for fastest charging).
- The LED display will show the charging progress. It is fully charged when the display shows 100%.
Image: This image illustrates four different methods to recharge the power bank: via 18W QC micro input, 18W PD/QC USB-C input, the built-in USB-A input cable, and 18W PD/QC USB-C cable input. Each method shows the estimated charging time.
6. Operating Instructions
Charging Your Devices
The Charmast power bank offers multiple ways to charge your devices:
- Using Built-in Cables: Select the appropriate built-in cable (Lightning for iPhone, USB-C for Android/iPad, Micro-USB for older devices) and plug it directly into your device.
- Using USB Output Ports: For devices not compatible with the built-in cables, use your own USB charging cable and connect it to either the USB-A or USB-C output port on the power bank.
The power bank will automatically begin charging your device. The LED display will show the remaining battery percentage.
Image: A white Charmast power bank with its built-in cables extended, one of which is connected to a smartphone. Below, icons indicate compatibility for iPhone, Android, and Micro-USB devices, along with an icon for recharging the power bank itself.
Image: The Charmast power bank simultaneously charging multiple devices, including two smartphones, a tablet, and wireless earbuds, demonstrating its capability to power up to six devices at once.
Checking Battery Level
The integrated LED digital display provides a precise indication of the power bank's remaining battery capacity. Simply press the power button once to activate the display, and the percentage will show for a few seconds.
Image: A Charmast power bank with its bright LED digital display showing '100%', indicating a full charge. A smartphone is connected to it via a white charging cable.
7. Maintenance
To ensure the longevity and optimal performance of your Charmast portable charger, follow these maintenance guidelines:
- Cleaning: Use a soft, dry cloth to clean the surface of the power bank. Do not use harsh chemicals or abrasive materials.
- Storage: Store the power bank in a cool, dry place away from direct sunlight and extreme temperatures. If storing for extended periods, charge it to about 50-70% every three months to prevent battery degradation.
- Avoid Over-Discharging: While the power bank has protection mechanisms, try to recharge it before it completely drains to 0% regularly.
8. Troubleshooting
If you encounter any issues with your Charmast portable charger, please refer to the table below:
| Problem | Possible Cause | Solution |
|---|---|---|
| Power bank not charging | Charging cable or adapter faulty; power bank fully charged; loose connection. | Try a different cable/adapter. Ensure connections are secure. Check if display shows 100%. |
| Device not charging from power bank | Power bank battery low; device cable faulty; device not compatible; loose connection. | Recharge the power bank. Try a different cable. Ensure device is compatible. Check connections. |
| Slow charging | Non-fast charging cable/adapter; multiple devices charging; device not supporting fast charge. | Use a fast-charging compatible cable/adapter. Disconnect other devices. Ensure your device supports fast charging. |
| LED display not working | Power bank is off; internal issue. | Press the power button. If issue persists, contact customer support. |
9. Technical Specifications
| Feature | Detail |
|---|---|
| Model Number | C2065 |
| Battery Capacity | 20000 Milliamp Hours (mAh) |
| Product Dimensions | 2.83 x 5.91 x 1.09 inches |
| Item Weight | 12 ounces |
| Input (USB-C) | 5V-3.0A / 9V-2.22A / 12V-1.67A |
| Output (USB-C Cable) | 5V-3.0A / 9V-2.22A / 12V-1.67A |
| Output (Lightning Cable) | 5V-2.4A / 9V-2.22A |
| Output (USB 2 Port) | 4.5V-5.0A / 5V-4.5A / 9V-2.0A / 12V-1.5A |
| Special Features | Digital Display, High Capacity, Slim, Fast Charging, Built-in Cables |
Image: A close-up of the Charmast power bank's output ports and built-in cables, with text overlays detailing the voltage and amperage specifications for the Lightning cable output, USB 2 output, and Type-C cable output.
10. Warranty and Customer Support
Charmast provides an 18-month warranty for this product, along with lifetime technical support. If you have any questions, concerns, or require assistance, please do not hesitate to contact our customer support team.
For more information and support, please visit the official Charmast store: Charmast Store on Amazon.
