charmast 22.5W 20000mAh Power Bank

Charmast 20000mAh Power Bank with Integrated Cables and Fast Charging

User Manual

1. Introduction

Thank you for choosing the Charmast 20000mAh Power Bank. This portable charger is designed to provide convenient and fast charging for a wide array of devices, featuring integrated cables and multiple output ports. Please read this manual carefully to ensure proper use and optimal performance of your device.

2. Key Features

  • Integrated Cables: Equipped with 3 built-in cables (USB-C, Lightning, Micro-USB) for direct charging without needing extra cables. It also features an integrated USB-A cable for self-recharging.
  • Simultaneous Charging: Capable of charging up to 5 devices at once, making it ideal for multiple gadgets or sharing power.
  • 22.5W Super Fast Charging: Supports PD3.0 and QC4.0 technologies, allowing your phone to charge from 0% to 65% in approximately 30 minutes.
  • High Capacity & Slim Design: A 20000mAh battery provides 3-4 full phone charges. Its slim profile (16 x 7.2 x 1.9 cm, 340 g) ensures easy portability.
  • Airline-Safe & Protections: Meets airline safety standards and includes intelligent protections against overcharge, overvoltage, overcurrent, short circuits, and overheating.
  • Smart Digital Display: A clear LED display shows the exact remaining battery percentage (0-100%), eliminating guesswork.

3. Package Contents

Upon opening your Charmast Power Bank package, you should find the following items:

  • 1 x Charmast 20000mAh Portable Power Bank
  • 1 x User Manual (this document)
  • 1 x Travel Pouch
Charmast 20000mAh Power Bank and its packaging
Image: The Charmast 20000mAh Power Bank shown alongside its retail packaging and travel pouch.

4. Product Overview

Familiarize yourself with the various components of your Charmast Power Bank:

Close-up of Charmast Power Bank ports and integrated cables
Image: A detailed view of the power bank's top edge, highlighting the integrated cables (USB-C, Lightning, Micro-USB) and the USB-A input cable, along with the USB-A and USB-C output ports.
  • Integrated Cables: Includes Lightning, USB-C, and Micro-USB for output, and a USB-A cable for input.
  • USB-A Output Port: For charging devices using your own USB-A cable.
  • USB-C Output/Input Port: For charging devices or recharging the power bank using a USB-C cable.
  • Micro-USB Input Port: For recharging the power bank using a Micro-USB cable.
  • LED Digital Display: Shows the remaining battery percentage.

5. Charging the Power Bank

Before using your power bank to charge other devices, ensure it is fully charged. You have several options to recharge the power bank:

  1. Using the Integrated USB-A Cable: Extend the built-in USB-A cable and plug it into a USB wall adapter (10W or more recommended). This method takes approximately 12 hours for a full charge.
  2. Using the USB-C Port: Connect a USB-C to USB-C cable or a USB-A to USB-C cable to the power bank's USB-C port and plug it into an 18W PD/QC compatible wall charger. This method takes approximately 6 hours for a full charge.
  3. Using the Micro-USB Port: Connect a Micro-USB cable to the power bank's Micro-USB port and plug it into an 18W QC compatible wall charger. This method takes approximately 6 hours for a full charge.

The LED digital display will show the charging progress. When it reaches 100%, the power bank is fully charged.

Diagram showing different ways to charge the Charmast Power Bank and their respective charging times.
Image: Illustration of various charging methods for the power bank, including Micro-USB, USB-C, and the integrated USB-A cable, with estimated charging times.

6. Charging Your Devices

The Charmast Power Bank offers versatile charging options for your electronic devices:

  1. Using Integrated Cables: Simply pull out the appropriate integrated cable (Lightning for iPhones, USB-C for Android/other USB-C devices, Micro-USB for older Android/accessories) and plug it directly into your device.
  2. Using USB-A Output Port: Connect your device's charging cable (USB-A end) to the power bank's USB-A output port, then connect the other end to your device.
  3. Using USB-C Output Port: Connect your device's USB-C charging cable to the power bank's USB-C port, then connect the other end to your device. This port supports 22.5W fast charging for compatible devices.

The power bank can charge up to 5 devices simultaneously using a combination of its integrated cables and external ports.

Smartphone charging from Charmast Power Bank using an integrated cable
Image: A smartphone being charged by the Charmast Power Bank using one of its integrated cables, demonstrating ease of use.
Charmast Power Bank charging multiple devices simultaneously
Image: The power bank connected to and charging multiple devices, including smartphones, a tablet, and earbuds, showcasing its multi-device charging capability.

7. LED Digital Display Guide

The integrated LED display provides real-time information about the power bank's battery status:

  • The display shows the exact percentage of remaining battery life (0-100%).
  • During charging, the percentage will increase, indicating the power bank is being recharged.
  • When charging a device, the display will show the remaining power decreasing.
Charmast Power Bank with LED display showing 100% battery
Image: A close-up of the power bank's LED screen clearly displaying '100%', indicating a full charge.

8. Safety Information and Maintenance

To ensure safe operation and prolong the lifespan of your power bank, please observe the following:

  • Airline Safety: This power bank meets all airline safety standards, making it a suitable travel companion.
  • Built-in Protections: The device features intelligent safeguards against overcharge, overvoltage, overcurrent, short circuits, and overheating.
  • Do not expose the power bank to extreme temperatures (hot or cold), direct sunlight, or humid environments.
  • Avoid dropping, hitting, or disassembling the device.
  • Keep out of reach of children.
  • Clean the power bank with a dry, soft cloth. Do not use corrosive cleaners.
Airline crew members on a runway, symbolizing the power bank's airline-safe design.
Image: Airline personnel on a tarmac, illustrating the power bank's compliance with airline safety regulations for travel.

9. Troubleshooting

If you encounter any issues with your Charmast Power Bank, please refer to the following common solutions:

  • Device not charging:
    • Ensure the power bank has sufficient charge. Check the LED display.
    • Verify that the charging cable (integrated or external) is securely connected to both the power bank and your device.
    • Try a different cable or port to rule out a faulty connection.
    • Ensure your device is compatible with the power bank's output specifications.
  • Power bank not recharging:
    • Ensure the charging cable is properly connected to the power bank's input port (USB-C, Micro-USB, or integrated USB-A) and the wall charger.
    • Verify that the wall charger is functioning correctly and provides adequate power (e.g., 18W for fast charging, 10W minimum for integrated USB-A).
    • Try a different wall charger or cable.
  • Slow charging:
    • Ensure both the power bank and your device support fast charging protocols (PD/QC).
    • Use a fast-charging compatible wall adapter and cable when recharging the power bank.
    • Avoid charging multiple devices simultaneously if you require maximum speed for a single device.

If the issue persists, please contact Charmast customer support.

10. Technical Specifications

Feature Specification
Brand charmast
Battery Capacity 20000 Milliamper-hour (mAh)
Color Black
Special Features Fast Charging, Slim Design
Voltage 3.7 Volts
Max Battery Power 20000 Milliamper-hour (mAh)
Number of Ports 2 (External USB-A, USB-C) + Integrated Cables
Compatible Devices Redmi Note, Samsung Galaxy S25, S25+, S25 Ultra, S24, S24+, S24 Ultra, S23, S23+, S23 Ultra, Z Fold 6, Z Flip 6, Z Flip 5, A56, A55, A26, A24, A16, iPhone 17/16/15/14/13/12/11 Plus/Pro/Pro Max, iPad series
Battery Type Lithium Polymer
Item Weight 350 Grams
Item Dimensions (LxWxT) 14.4L x 6.7W x 1.8H cm
Battery Weight 148 Grams
Number of Batteries 2 (included)
Manufacturer Dong guan Utopia-Originality Technology Co., Ltd
Country of Origin China

11. Warranty and Support

Your Charmast Power Bank comes with a 12-month product warranty. In addition, Charmast offers lifetime technical support to ensure your product functions perfectly.

For any product inquiries, technical assistance, or warranty claims, please contact Charmast customer support through the retailer where you purchased the product or visit the official Charmast website.

12. Product Video Overview

Watch this short video for a visual overview of the Charmast Power Bank's features and how it can simplify your charging needs.

Video: A comprehensive overview of the Charmast Power Bank, demonstrating its integrated cables, slim design, 20000mAh capacity, universal compatibility, and various charging methods. It highlights its suitability for travel and outdoor activities.

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