Charmast 26800mAh Slim Portable Charger Power Bank User Manual

1. Introduction

Thank you for choosing the Charmast 26800mAh Slim Portable Charger Power Bank. This device is designed to provide reliable and fast charging for your electronic devices on the go. With its high capacity and multiple output ports, it is an ideal companion for travel, outdoor activities, and daily use. Please read this manual carefully to ensure proper use and maintenance of your power bank.

Image: The Charmast 26800mAh Slim Portable Charger Power Bank, showcasing its sleek white design and multiple charging ports.

2. Key Features

• High Capacity: Equipped with a massive 26800mAh battery, capable of charging an iPhone 13 approximately 3.8 times, an iPad mini 3 times, or a Samsung Galaxy 4 times.

Image: An infographic illustrating the substantial 26800mAh capacity, showing how many times it can charge different smartphone models.
• High-Speed Charging: Features 4 smart USB outputs and a versatile USB-C port that supports both fast input and output, allowing simultaneous charging of up to 4 devices.


Image: A visual representation of the bi-directional USB-C port, highlighting its 5V/3A fast charging capability for both input and output.

• Multiple Inputs and Outputs: Includes 3 input options (USB-C, Micro USB, Lightning) and 4 output ports (3 USB-A, 1 USB-C) for broad compatibility.

Image: A close-up view of the power bank's side, clearly labeling its three input ports (Micro USB, USB-C, Lightning) and four output ports (USB 1, 2, 3, and USB-C).
• Compact and Slim Design: With a thickness of only 0.6 inches and a weight of approximately 11.9 ounces, it offers a comfortable grip and portability. The fully rubberized cover protects against scratches and drops.


Image: A hand holding the power bank, emphasizing its ultra-slim profile of just 0.61 inches, set against a clear sky background.

• Smart Protection Technology: UL 2056 certified, with built-in safeguards to protect your devices from excessive current, overheating, overcharging, and short circuits.
• LED Indicator: Four LED lights clearly display the remaining battery level of the power bank at a glance.
• Wide Compatibility: Compatible with a broad range of devices including iPhones, iPads, Samsung Galaxy phones, Google Pixel, Nintendo Switch, and more.


Image: A collection of electronic devices, including smartphones, tablets, smartwatches, and a Nintendo Switch, arranged around the power bank to demonstrate its wide compatibility.

3. Setup and Charging

3.1 Charging the Power Bank

Before first use, fully charge the power bank. It can be recharged using a USB-C cable, Micro USB cable, or Lightning cable.

1. Connect one end of a compatible charging cable (USB-C, Micro USB, or Lightning) to the corresponding input port on the power bank.
2. Connect the other end of the cable to a USB wall charger (not included) or a computer's USB port.
3. The LED indicators will light up to show the charging progress. All four LEDs will be solid when the power bank is fully charged.

3.2 Charging Your Devices

The power bank can charge up to four devices simultaneously.

1. Connect your device's charging cable to one of the power bank's output ports (USB-A or USB-C).
2. Connect the other end of the cable to your device.
3. The power bank will automatically begin charging your device.

Image: The power bank connected and simultaneously charging a smartphone, a tablet, a Nintendo Switch, and wireless earbuds, demonstrating its multi-device charging capability.

4. Operation

4.1 Checking Battery Level

Press the power button once to activate the LED indicators and check the remaining battery level:

• 1 LED: 0-25% remaining battery
• 2 LEDs: 25-50% remaining battery
• 3 LEDs: 50-75% remaining battery
• 4 LEDs: 75-100% remaining battery

The LEDs will turn off automatically after a few seconds or when charging is complete.

5. Maintenance

To ensure the longevity and optimal performance of your Charmast power bank, please follow these maintenance guidelines:

• Storage: Store the power bank in a cool, dry place away from direct sunlight and extreme temperatures.
• Cleaning: Use a soft, dry cloth to clean the surface of the power bank. Do not use harsh chemicals or abrasive materials.
• Avoid Drops: While the power bank has a rubberized cover, avoid dropping it or subjecting it to strong impacts.
• Charging Cycle: For best battery health, fully charge and discharge the power bank at least once every three months if not in regular use.

6. Troubleshooting

If you encounter issues with your power bank, please refer to the following common problems and solutions:

• Power Bank Not Charging:
  • Ensure the charging cable is securely connected to both the power bank and the power source.
  • Try a different charging cable or wall adapter.
  • Verify that the power source (wall outlet, computer USB port) is functional.
• Device Not Charging from Power Bank:
  • Ensure the power bank has sufficient charge (check LED indicators).
  • Verify that your device's charging cable is securely connected to both the power bank and your device.
  • Try a different output port on the power bank.
  • Try a different charging cable for your device.
• Slow Charging:
  • Ensure you are using a high-quality cable and a compatible wall adapter for optimal charging speed.
  • Charging multiple devices simultaneously may reduce the charging speed for individual devices.

7. Specifications

8. Warranty and Support

Charmast provides 24 months of after-sale technical support for this product. If you encounter any technical problems or have questions, please feel free to contact us via Amazon message email with your ORDER number.

We are committed to providing excellent customer service and ensuring your satisfaction with our products.