ROMOSS B0DS49XPPJ
ROMOSS 30,000mAh + 75,000mAh 200W Portable Charger User Manual
Model: B0DS49XPPJ
1. Introduction
Thank you for choosing the ROMOSS 30,000mAh + 75,000mAh 200W Portable Charger. This high-capacity power bank is designed to provide reliable power for your devices during outdoor adventures, camping trips, or power outages. Please read this manual carefully before using the product to ensure safe and optimal performance.
2. Product Overview
The ROMOSS Portable Charger features a robust design with multiple charging ports and an integrated LED light. It is engineered for portability and versatility.
2.1 Key Features
- High Capacity: Available in 30,000mAh and 75,000mAh options, providing extensive power for multiple charges.
- Multiple Charging Ports: Includes two USB-C input/output ports, dual USB output ports, and an AC socket for wide compatibility.
- Portable Design: Equipped with a convenient handle for easy transportation, ideal for outdoor and indoor use.
- Integrated LED Lighting: Features three brightness levels for emergency lighting, camping, or study nights.
- Smart Digital Display: Provides real-time battery levels and charging status.
- 200W Rated AC Output: Capable of powering small appliances.
2.2 Product Components

Image: The two models of ROMOSS portable chargers, a white 30,000mAh unit and a black 75,000mAh unit with a handle and integrated light.

Image: A detailed view of the ROMOSS 75,000mAh portable charger's top panel, showing the AC outlet, two USB-C ports, and two USB-A ports, along with power and LED light buttons and a digital display. Labels indicate output and input specifications for each port.
- AC Outlet: For powering devices requiring an AC input (up to 200W).
- USB-C Ports (C1 & C2): Both input and output, supporting fast charging.
- USB-A Ports (A1 & A2): Output only, for standard USB charging.
- Digital Display: Shows battery percentage and charging status.
- LED Light: Multi-level illumination.
- Power Button: To turn the unit on/off.
- LED Light Button: To control the LED light.
3. Setup
Before first use, it is recommended to fully charge your ROMOSS Portable Charger.
- Unpack: Remove the portable charger and all accessories from the packaging.
- Initial Charge: Connect the portable charger to a power source using a USB-C cable and a compatible wall adapter. The digital display will show the charging progress.
- Full Charge Indication: The display will show "100%" when fully charged.
4. Operating Instructions
4.1 Charging Devices
The ROMOSS Portable Charger can charge multiple devices simultaneously.

Image: The ROMOSS portable charger simultaneously charging a smartphone, a laptop, a portable fan, and a projector, demonstrating its multi-device charging capability.
- Turn On: Press the Power Button once to turn on the portable charger. The digital display will illuminate.
- Connect Device:
- For USB-C devices: Connect your device to either USB-C port (C1 or C2) using a compatible USB-C cable.
- For USB-A devices: Connect your device to either USB-A port (A1 or A2) using a compatible USB-A cable.
- For AC devices: Plug your device's power cord into the AC outlet. Ensure the device's power consumption does not exceed 200W.
- Charging Indication: Your device should begin charging automatically. The portable charger's display will show the remaining battery percentage.
- Turn Off: The portable charger will automatically turn off after a period of inactivity or when all connected devices are fully charged. You can also press and hold the Power Button to manually turn it off.

Image: The ROMOSS 75,000mAh portable charger connected to a smartphone on a picnic blanket, with an overlay showing its capacity to charge an iPhone 15 Pro 15 times, Samsung Galaxy S23 14 times, MacBook Pro 14" 3 times, and iPad 10th Gen 6.7 times.

Image: The ROMOSS portable charger simultaneously charging an iPad and a laptop on a wooden table outdoors, highlighting its ability to deliver 100W Max and 65W Max output respectively.

Image: The ROMOSS portable charger connected to and powering a small portable mini-fridge filled with drinks, demonstrating its 200W rated AC output for outdoor camping or similar uses.
4.2 Using the LED Light
The integrated LED light provides illumination for various situations.

Image: The ROMOSS portable charger with its LED light illuminated, showcasing its use for power outage emergencies, study nights, and camping illumination, with claims of up to 13 days of lighting and 3 brightness levels.
- Turn On/Adjust Brightness: Press the LED Light Button once to turn on the light at the lowest brightness. Subsequent presses will cycle through medium brightness, high brightness, and then turn the light off.
- Emergency Mode: Some models may have an SOS or strobe mode. Refer to the specific product details for activation, usually by a long press of the LED Light Button.
5. Maintenance
- Cleaning: Wipe the exterior with a soft, dry cloth. Do not use abrasive cleaners or immerse the unit in water.
- Storage: Store the portable charger in a cool, dry place away from direct sunlight and extreme temperatures. For long-term storage, charge the unit to about 50-70% every 3-6 months to preserve battery health.
- Avoid Drops: Protect the device from drops and impacts.
6. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Device not charging from power bank. | Power bank is off or low battery. Incorrect cable or port used. Device is not compatible or requires more power than available. | Press the Power Button to turn on. Recharge the power bank. Ensure correct cable and port are used. Check device's power requirements. |
| Power bank not charging. | Charging cable or adapter faulty. Charging port dirty. | Try a different USB-C cable and wall adapter. Gently clean the charging port. |
| LED light not working. | Power bank is off. LED light button not pressed correctly. | Turn on the power bank. Press the LED Light Button firmly. |
| AC outlet not working. | Device exceeds 200W limit. AC function not activated. | Check device's power consumption. Ensure the power bank is on and AC function is enabled (if applicable, usually automatic when plugged in). |
7. Specifications
| Feature | Detail |
|---|---|
| Model | B0DS49XPPJ (PMT75 for 75,000mAh model) |
| Capacity | 30,000mAh / 75,000mAh (depending on model) |
| AC Output | 200W Max (100-120V) |
| USB-C Output (C2) | 100W Max |
| USB-C Output (C1) | 65W Max |
| USB-A Output (A2) | 22.5W Max |
| USB-A Output (A1) | 22.5W Max |
| USB-C Input (C2) | 100W Max |
| USB-C Input (C1) | 65W Max |
| Dimensions (75,000mAh model) | Approx. 9 inch (H) x 4.5 inch (W) x 3.7 inch (D) |
| Weight (75,000mAh model) | Approx. 5.7 lbs |
| Other Features | Wireless (as per product spec, though not explicitly detailed in features) |

Image: A person holding the ROMOSS portable charger, with overlaid text indicating its dimensions (9 inches high, 4.5 inches wide, 3.7 inches deep) and weight (5.7 lbs), emphasizing its portability.
8. What's in the Box

Image: The contents of the ROMOSS portable charger package, including the power bank itself, a USB-C to USB-C cable, and the user manual, displayed alongside the product box.
- 1 x ROMOSS Portable Power Bank (30,000mAh or 75,000mAh model)
- 1 x USB-C to USB-C Cable
- 1 x User Manual
9. Safety Information
Please read and follow these safety guidelines to prevent injury or damage to the product:
- Do not expose the product to extreme temperatures (above 45°C/113°F or below 0°C/32°F).
- Do not expose to water, moisture, or high humidity.
- Do not disassemble, repair, or modify the product.
- Keep away from children and pets.
- Do not drop, puncture, or apply strong force to the product.
- Use only original or certified cables and adapters.
- Dispose of the product responsibly according to local regulations.
10. Warranty and Support
ROMOSS products come with a standard warranty. For detailed warranty information, product support, or to register your product, please visit the official ROMOSS website or contact their customer service. Please retain your proof of purchase for warranty claims.
ROMOSS Official Store: Visit the ROMOSS Store on Amazon
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