1. Product Overview
The ROMOSS 20000mAh Portable Charger (Model SW20PF) is a high-capacity power bank designed for fast and efficient charging of various electronic devices. It features 22.5W and PD 20W fast charging capabilities, a comprehensive LED digital display, and multiple input/output ports for versatile use.

Image: The ROMOSS 20000mAh Portable Charger, showcasing its sleek design and integrated LED digital display.
Key Features:
- Comprehensive Power Display: An upgraded LED digital indicator precisely shows battery percentage, charging voltage, and charging current. A blue sign indicates Fast Charge+ mode when a compatible device is connected.
- PD20W Fast Charging: Equipped with USB-A1 22.5W and PD 20W USB-C output, allowing devices like the iPhone 13 to charge to 60% in approximately 30 minutes.
- Simultaneous Charging: Capable of charging up to three devices concurrently at a maximum speed of 3 amps.
- Universal Compatibility: Features three input ports (Micro-USB, Type-C, Lightning) and three output ports (2x USB-A, 1x Type-C), providing convenience with various cable types.
- Tremendous Capacity: The 20,000mAh capacity provides multiple charges for smartphones, tablets, and other portable devices. For example, it can provide approximately 8.4 charges for an iPhone 8 or 1.8 charges for an iPad Pro.
2. Setup
Initial Charging of the Power Bank:
- Before first use, fully charge the power bank.
- Connect the power bank to a wall charger using a Micro-USB, Type-C, or Lightning cable. The Type-C port supports both input and output.
- The LED display will show the charging progress. It takes approximately 7 hours to fully recharge the 20,000mAh power bank with an 18W wall charger.

Image: The ROMOSS power bank being recharged via its USB-C port, illustrating the input capability.
3. Operating Instructions
Checking Battery Level:
Press the power button once to activate the LED digital display. The display will show the current battery percentage, charging voltage, and charging current.

Image: A close-up of the smart digital display on the ROMOSS power bank, showing detailed power metrics.
Charging Your Devices:
- Connect your device to one of the power bank's output ports (USB-A or Type-C) using a compatible charging cable.
- The power bank will automatically begin charging your device. The LED display will show the charging status.
- For fast charging, ensure your device and cable support PD (Power Delivery) or QC (Quick Charge) protocols. The blue indicator on the display signifies Fast Charge+ mode.

Image: The ROMOSS power bank simultaneously charging three different mobile devices, demonstrating its multi-device charging capability.

Image: An iPhone 13 connected to the ROMOSS power bank, illustrating its ability to charge the device to 60% in just 30 minutes.
4. Maintenance and Care
- 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.
- Safety Precautions: Avoid dropping, disassembling, or exposing the power bank to water or fire. Keep out of reach of children.
- Airline Travel: This 20,000mAh power bank is generally approved for airline travel. Always check current airline regulations before flying.

Image: The ROMOSS power bank being used on an airplane, highlighting its travel-ready and airline-approved design.
5. Troubleshooting
- Power bank not charging: Ensure the charging cable and wall adapter are functioning correctly. Try a different cable or adapter. Check if the input port (Micro-USB, Type-C, or Lightning) is securely connected.
- Device not charging from power bank: Ensure the power bank has sufficient charge. Check if the output cable is securely connected to both the power bank and your device. Try a different output port or cable.
- Slow charging: Verify that your device and cable support fast charging protocols (PD/QC). If charging multiple devices, the output current may be distributed, leading to slower charging for individual devices.
- LED display not working: Press the power button to activate the display. If it remains off, the power bank might be completely discharged or require service.
6. Specifications
| Specification | Detail |
|---|---|
| Model Number | SW20PF |
| Battery Capacity | 20000mAh |
| Input Ports | Micro-USB, Type-C, Lightning |
| Output Ports | USB-A (2x), Type-C |
| Fast Charging Output | USB-A1 22.5W, PD 20W USB-C |
| Dimensions | 16.9 x 8.1 x 2.4 cm |
| Weight | 463 Grams |
| Battery Type | Lithium Polymer |
7. Warranty and Support
The ROMOSS SW20PF 20,000mAh power bank comes with a 12-month warranty from the date of purchase. This warranty covers manufacturing defects and issues arising from normal use.
For customer service, technical support, or warranty claims, please contact ROMOSS customer service through their official channels or visit the ROMOSS Store on Amazon.
Please retain your proof of purchase for warranty validation.







