1. Introduction
This manual provides detailed instructions for the installation, operation, and maintenance of your Nilight Rocker Switch Style Dual USB Charger with LED Voltmeter. This device is designed to provide efficient charging for your mobile devices and monitor your vehicle's voltage, fitting seamlessly into standard rocker switch panels in various vehicles such as boats, RVs, trucks, and cars.
2. Product Features
- Efficient Dual USB Charging: Provides dual 5V 2.4A DC output, enabling simultaneous charging of two devices at full speed, with a total power of 4.8A. This makes the charger up to 40% faster than conventional chargers.
- Integrated LED Voltmeter: A built-in voltmeter in the center of the USB charger clearly displays current voltage readings, allowing easy monitoring of the vehicle's battery condition.
- Standard Rocker Switch Fit: Designed to fit common rocker switch panels, making it an ideal replacement or addition for extra rectangular accessory holes in dashboards.
- Wide Application: Compatible with most mobile devices including digital cameras, PDAs, mobile phones, and other USB accessories. Suitable for cars, buses, boats, ATVs, UTVs, golf carts, tractors, and other 12V-24V DC vehicles.
- Durable Construction: Made from superior ABS+PC material, ensuring durability and a waterproof/dustproof cap for protection.
- Overload Protection: Includes a built-in 10A fuse for over-load protection.
3. Package Contents
The package includes the following items:
- One (1) Rocker Switch Style USB Charger with LED Voltmeter
- One (1) Wiring Harness with Inline Fuse
4. Setup and Installation
Follow these steps for proper installation of your Nilight USB charger:
4.1. Product Dimensions and Wiring
Before installation, ensure the product dimensions fit your desired mounting location. The charger measures approximately 1.57 inches in height and 0.98 inches in width for the visible face. The total depth is about 1 inch. The wiring harness includes a 10A fuse for over-load protection and has a cable length of 24.8 inches with a terminal diameter of 0.24 inches.
Image: Detailed view of the Nilight USB charger showing its dimensions, the dual USB ports, LED voltmeter, and the included wiring harness with a 10A fuse.
4.2. Connecting the Wires
The charger is designed for easy installation. The terminals are marked with "+" for positive and "-" for negative to aid in correct wiring. Ensure proper polarity when connecting to your vehicle's 12V-24V DC power source. The wires can be easily disconnected by pressing down the clips on the terminals.
Image: Close-up of the Nilight USB charger highlighting its durable ABS plastic construction and the waterproof/dustproof cap for the USB ports.
4.3. Mounting into a Rocker Switch Panel
The charger is designed to fit into standard rocker switch panel cutouts. Simply push the charger into an available slot until it clicks securely into place. This allows for a clean and integrated look in your vehicle's dashboard or control panel.
Image: Illustration demonstrating how the Nilight USB charger fits into a standard rocker switch panel, showing it as a direct replacement or addition.
4.4. Installation Video Guide
For a visual guide on installation and features, please refer to the video below:
Video: Official Nilight video demonstrating the features and installation process of the Rocker Switch Style USB Charger with LED Voltmeter.
5. Operation
Once installed and powered, the Nilight USB charger is ready for use.
5.1. USB Charging
Plug your USB-powered devices into either of the two USB ports. The charger will automatically detect and deliver optimal charging current up to 2.4A per port, with a total of 4.8A. The charging speed is significantly faster than conventional chargers.
Image: Diagram illustrating the fast charging capability of the Nilight Dual USB Charger, showing a device charging to 90% compared to 30% with conventional chargers.
Image: The Nilight USB charger installed in a vehicle's dashboard, actively charging a smartphone via one of its USB ports.
5.2. LED Voltmeter Display
The integrated LED display shows the real-time voltage of your vehicle's battery. This allows you to monitor the battery's health and ensure it is within safe operating ranges. Refer to the voltage chart below for typical readings:
- Normal voltage after car starting: 13.4V - 14.8V
- Normal voltage before car starts: 12.2V - 12.8V
- Below 12V: Indicates a need to change or replace your battery.
Image: The LED voltmeter displaying a voltage reading, accompanied by a color-coded chart explaining normal voltage ranges before and after starting the vehicle, and when battery replacement is recommended.
6. Maintenance
To ensure the longevity and optimal performance of your Nilight USB charger, follow these maintenance guidelines:
- Keep Ports Covered: Always ensure the waterproof and dustproof cap is securely closed over the USB ports when not in use to prevent ingress of water, dust, or debris.
- Regular Cleaning: Periodically wipe the surface of the charger with a soft, dry cloth to remove any dust or grime. Avoid using abrasive cleaners or solvents.
- Inspect Wiring: Occasionally check the wiring connections for any signs of wear, corrosion, or looseness. Ensure the inline fuse is intact and properly seated.
- Avoid Overloading: While the charger has built-in overload protection, avoid connecting devices that draw excessive current beyond the specified 4.8A total output.
7. Troubleshooting
If you encounter issues with your Nilight USB charger, refer to the following troubleshooting steps:
| Problem | Possible Cause | Solution |
|---|---|---|
| No power to the unit / Voltmeter not displaying |
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| Devices not charging or charging slowly |
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| Unit feels hot during operation |
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8. Specifications
| Specification | Detail |
|---|---|
| Brand | Nilight |
| Model | 90174B-A |
| Operation Mode | ON-OFF |
| Current Rating | 4.8 Amps (Total USB Output) |
| Operating Voltage | 12 Volts (DC) - 24 Volts (DC) |
| Contact Type | Normally Closed |
| Connector Type | Plug In |
| Switch Type | Rocker |
| Terminal | SPST |
| Material | Plastic (Superior ABS+PC) |
| Item Dimensions (L x W x H) | 2 x 2 x 1 inches |
| Circuit Type | 5-way |
| Mounting Type | Panel Mount |
| Actuator Type | Rocker |
| Number of Positions | 5 |
| Wattage | 24 watts |
| Connectivity Protocol | USB |
| International Protection Rating | IP65 (Waterproof/Dustproof) |
| Specification Met | CE |
| Item Weight | 0.01 Ounces |
9. Warranty and Support
The Nilight Rocker Switch Style Dual USB Charger with LED Voltmeter comes with a 2-Year Warranty from the date of purchase. This warranty covers manufacturing defects and material flaws under normal use.
For technical support, warranty claims, or any questions regarding your product, please contact Nilight customer service through their official website or the retailer where the product was purchased. Please have your model number (90174B-A) and proof of purchase ready when contacting support.
