Introduction
Thank you for choosing the ROMOSS Power Bank Set. This manual provides essential information for the safe and efficient use of your Sense8+ 30000mAh and Sense4SF 10000mAh portable chargers. Please read these instructions carefully before use and retain them for future reference.
Product Overview
This set includes two high-capacity portable power banks designed to charge your electronic devices on the go:
- ROMOSS Sense8+ 30000mAh Power Bank: Features 18W fast charging and multiple output ports for simultaneous device charging.
- ROMOSS Sense4SF 10000mAh Power Bank: Equipped with 22.5W Quick Charge and 20W Power Delivery (PD) technologies for rapid charging of compatible devices.

Image: The ROMOSS Sense8+ 30000mAh power bank, a white rectangular device with multiple ports and LED indicators.

Image: The ROMOSS Sense4SF 10000mAh power bank, a smaller white rectangular device, held in a hand to show its compact size.
Setup
Initial Charging of the Power Bank
Before first use, it is recommended to fully charge your ROMOSS power bank. This ensures optimal performance and battery longevity.
- Connect a compatible charging cable (Micro USB or USB-C, depending on the power bank model and available port) to the input port of the power bank.
- Connect the other end of the cable to a USB wall adapter (not included) or a computer's USB port.
- The LED indicators on the power bank will illuminate to show the charging status. All indicators will be solid when fully charged.

Image: Close-up view of the input and output ports on the ROMOSS Sense8+ power bank, including USB-A, USB-C, and Micro USB ports.
Operating Instructions
Charging Your Devices
To charge your mobile phone, tablet, or other USB-powered devices:
- Ensure the power bank has sufficient charge. Press the power button (if available) to activate the power bank and check the LED indicators.
- Connect your device to an output port on the power bank using its original charging cable or a certified compatible cable. The power banks feature USB-A and USB-C output ports.
- Charging will begin automatically. The LED indicators on the power bank will show its remaining battery level.
- You can charge multiple devices simultaneously using the available output ports on both power banks.

Image: Two ROMOSS power banks (Sense8+ and Sense4SF) simultaneously charging a smartphone, a tablet, and another smartphone, demonstrating multi-device charging capability.
Fast Charging Features
Both power banks support fast charging technologies to reduce charging times for compatible devices:
- The Sense8+ 30000mAh power bank offers 18W fast charging, capable of charging QC-supported devices up to 80% in approximately 35 minutes.
- The Sense4SF 10000mAh power bank features 22.5W PD3.0 & QC4.0, allowing an iPhone 13 to charge up to 60% in just 30 minutes.
For optimal fast charging, ensure your device and charging cable also support the respective fast charging protocols (Quick Charge or Power Delivery).

Image: A graphic illustrating the speed difference between ROMOSS Fit+ fast charging (80% in 35 minutes) and conventional charging (18% in 35 minutes).

Image: The ROMOSS Sense4SF 10000mAh power bank connected via a USB-C cable, fast charging an iPhone 13, showing 60% charge in 30 minutes.
Maintenance
Proper care and maintenance will extend the lifespan of your power banks:
- Storage: Store the power banks in a cool, dry place away from direct sunlight and extreme temperatures.
- Cleaning: Use a soft, dry cloth to clean the exterior of the power banks. Do not use liquid cleaners or abrasive materials.
- Avoid Damage: Do not drop, puncture, or disassemble the power banks. Keep them away from water and high humidity.
- Regular Use: For optimal battery health, use and recharge the power banks at least once every three months.
Troubleshooting
- Power bank not charging:
- Ensure the charging cable is securely connected to both the power bank's input port and the wall adapter.
- Verify that the wall adapter is functioning correctly and plugged into a live power outlet.
- Try a different charging cable or wall adapter.
- Device not charging from power bank:
- Check if the power bank has sufficient charge.
- Ensure the charging cable is securely connected to both the power bank's output port and your device.
- Try a different charging cable or a different output port on the power bank.
- Confirm your device is compatible with USB charging.
- Slow charging:
- Ensure you are using a fast-charging compatible cable and your device supports fast charging protocols (QC, PD).
- Some devices may limit charging speed when multiple devices are connected.
Specifications
| Feature | Sense8+ (30000mAh) | Sense4SF (10000mAh) |
|---|---|---|
| Battery Capacity | 30000mAh | 10000mAh |
| Input Ports | Micro USB, USB-C | Micro USB, USB-C |
| Output Ports | 3 x USB-A | 1 x USB-A, 1 x USB-C (PD) |
| Fast Charging | 18W Quick Charge | 22.5W Quick Charge, 20W Power Delivery |
| Safety Features | Over-heat, Over-charge, Over-current, Over-discharge, Short-circuit Protection | |
| Recommended Use | Smartphones, Tablets, other USB-powered devices | |

Image: A graphic demonstrating the charging capacity of a 30000mAh power bank, showing it can charge a Nintendo Switch 4 times, an iPhone 8 12.6 times, a Samsung S9 7.2 times, and an iPad Pro 4 times.
Safety Information
Please observe the following safety precautions to prevent injury or damage to your power banks and devices:
- Do not expose the power banks to fire, water, or extreme temperatures (above 60°C/140°F or below 0°C/32°F).
- Do not disassemble, modify, or attempt to repair the power banks.
- Avoid dropping or subjecting the power banks to heavy impact.
- Keep out of reach of children.
- Dispose of the power banks responsibly according to local regulations. Do not dispose of them in household waste.
- The power banks are designed with multiple safety protections, including over-heat, over-charge, over-current, over-discharge, and short-circuit protection.
- The ROMOSS Sense4SF 10000mAh power bank is generally considered airline-approved for carry-on luggage due to its capacity. Always check current airline regulations before travel.

Image: The ROMOSS Sense4SF 10000mAh power bank held in a hand, with an airplane window visible in the background, indicating its suitability for air travel.
Warranty and Support
For warranty information and customer support, please refer to the product packaging or visit the official ROMOSS website. If you encounter any issues not covered in this manual, please contact ROMOSS customer service for assistance.
ROMOSS Official Website: www.romoss.com





