1. Introduction
Thank you for purchasing the DUDAO R7S 3-Port USB 18W Quick Charge 3.0 Car Charger. This manual provides important information regarding the safe and efficient use of your new car charger. Please read these instructions carefully before use and retain them for future reference.
2. Safety Information
To ensure safe operation and prevent damage, please observe the following safety precautions:
- Do not expose the charger to water, moisture, or extreme temperatures.
- Do not disassemble, modify, or attempt to repair the charger. This will void the warranty and may cause electric shock or fire.
- Keep the charger away from children.
- Ensure the car's cigarette lighter socket is clean and free of debris before inserting the charger.
- Use only compatible USB cables with your devices.
- Unplug the charger from the car socket when not in use for extended periods.
3. Product Overview
The DUDAO R7S Car Charger is designed to provide efficient charging for your mobile devices on the go. It features three USB ports, with one port supporting Quick Charge 3.0 technology for faster charging of compatible devices, and two standard USB ports for other devices.

Image 3.1: Front view of the DUDAO R7S Car Charger, highlighting the three USB charging ports.
Key Features:
- 3 USB Ports: Charge multiple devices simultaneously.
- Quick Charge 3.0: One dedicated port for rapid charging of QC3.0 compatible devices.
- 18W Total Power: Sufficient power output for efficient charging.
- Compact Design: Fits seamlessly into most car interiors.
4. Setup
Setting up your DUDAO R7S Car Charger is simple:
- Locate the 12V/24V cigarette lighter socket in your vehicle.
- Insert the DUDAO R7S Car Charger firmly into the socket until it is securely seated.
- The charger is now ready for use.

Image 4.1: The DUDAO R7S Car Charger installed in a vehicle's power outlet, charging multiple devices.
5. Operating Instructions
To charge your devices:
- Connect your device to the car charger using a compatible USB charging cable.
- For devices supporting Quick Charge 3.0, use the orange-colored USB port for optimal charging speed.
- For other devices, use any of the standard USB ports.
- Ensure your device's charging indicator shows that it is receiving power.
The charger can charge up to three devices simultaneously. The total power output is 18W, which is distributed among the connected devices.
6. Maintenance
Proper maintenance ensures the longevity and performance of your car charger:
- Cleaning: Use a soft, dry cloth to wipe the exterior of the charger. Do not use liquid cleaners or aerosols.
- Storage: When not in use, store the charger in a cool, dry place, away from direct sunlight and extreme temperatures.
- Connection: Periodically check the car's cigarette lighter socket for any dust or debris that might hinder proper connection.
7. Troubleshooting
If you encounter issues with your DUDAO R7S Car Charger, refer to the following common problems and solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| Device not charging. |
|
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| Slow charging speed. |
|
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| Charger gets warm. | Normal operation under load. | This is normal during charging. If it becomes excessively hot or emits smoke/smell, unplug immediately and discontinue use. |
8. Specifications
| Brand | DUDAO |
| Model Number | R7S-WHITE |
| ASIN | B088GNVFVP |
| Total USB Ports | 3 |
| Power Output | 18 Watts |
| Amperage | 2.4 A (per standard port, QC3.0 port varies) |
| Compatible Devices | Smartphones, Tablets, and other USB-powered devices |
| Weight | 100 Grams |
| Country of Origin | China |
9. Warranty and Support
DUDAO products are manufactured to high-quality standards. For warranty information or technical support, please refer to the retailer's return policy or contact the seller directly through your purchase platform. Please have your product model number (R7S) and purchase details ready when contacting support.