VLM Group VLM CH7.4/1500
VLM Group 7.4V Battery Charger Instruction Manual
Model: VLM CH7.4/1500
Introduction
Thank you for choosing the VLM Group 7.4V Battery Charger. This charger is specifically designed for 7.4V Lithium-Ion batteries used in WLtoys 4WD RC Cars, including models 12401, 12402, 12403, 12404, 12423, and 12428 Series. This manual provides essential information for the safe and efficient operation of your charger. Please read it thoroughly before use.
Important: This package includes the charger only. The battery and RC car are not included and are shown for illustrative purposes to demonstrate compatibility.
Setup
Follow these steps to set up your VLM Group 7.4V Battery Charger:
- Inspect the Charger: Before first use, carefully inspect the charger and its cables for any signs of damage. Do not use if any damage is observed.
- Connect to Power Source: Plug the USB end of the charger into a compatible USB power source (e.g., a computer USB port, a USB wall adapter, or a power bank) with an output of DC 5V 1-2A.
- Verify Battery Connector: Ensure your battery has the correct white 3-wire connector that matches the charger's connector. Compatibility is crucial for safe charging.
- Connect Battery: Carefully connect your 7.4V Lithium-Ion battery to the charger's white 3-wire connector. Ensure the connection is firm and secure.
Figure 1: The VLM Group 7.4V USB Battery Charger, showing its main body and USB connector.
Figure 2: Close-up view of the charger's white 3-wire connector, which connects to the battery.
Figure 3: A detailed view of the battery's white 3-wire connector, which must match the charger's connector.
Figure 4: A sample 1500mAh battery, illustrating the type of battery and its white 3-wire connector compatible with this charger.
Operating Instructions
Once the charger is connected to a power source and the battery is connected to the charger, the charging process will begin automatically. The charger is designed to provide a stable 7.4V output at 800mA for efficient charging.
Charging Indicator: While specific indicator light behavior is not detailed, typically, a charger will have an LED that changes color (e.g., red for charging, green for fully charged) or turns off when charging is complete. Refer to the charger's label for any specific LED indications.
Charging Time: Charging time will vary depending on the capacity of your battery and its current charge level. For a 1500mAh battery, a full charge may take approximately 2-3 hours, but this is an estimate. Always monitor the battery during charging.
Video 1: A demonstration of the VLM USB Charger, showing its physical appearance and connectors. This video helps in identifying the product and its components.
Maintenance
- Cleaning: Use a soft, dry cloth to clean the charger. Do not use liquid cleaners or solvents.
- Storage: Store the charger in a cool, dry place away from direct sunlight and extreme temperatures.
- Cable Care: Avoid bending or crimping the cables excessively. Do not pull the charger by its cable when unplugging.
- Safety: Always unplug the charger from the power source when not in use. Do not leave batteries charging unattended for extended periods.
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Battery not charging | Loose connection Faulty USB power source Incompatible battery connector Damaged charger | Ensure all connections are secure. Try a different USB port or wall adapter. Verify your battery's connector matches the charger's white 3-wire connector. Contact customer support if the charger is damaged. |
| Slow charging | Low current USB power source High battery capacity | Use a USB power source with at least 1A output. Larger capacity batteries naturally take longer to charge. |
| Charger gets hot | Normal operation (slight warmth) Overload or short circuit | Slight warmth is normal during charging. If it becomes excessively hot, disconnect immediately and contact support. Ensure no short circuits. |
Specifications
- Brand: VLM Group
- Model: VLM CH7.4/1500
- Input Voltage: DC 5V 1-2A (via USB)
- Output Voltage: 7.4 Volts
- Output Current: 800mA
- Color: Black (charger body), White (connector)
- Item Weight: Approximately 4 ounces
- Package Dimensions: Approximately 6 x 5 x 1 inches
- Compatibility: 7.4V Lithium-Ion batteries with white 3-wire connector for WLtoys 4WD RC Cars 12401, 12402, 12403, 12404, 12423, 12428 Series.
Warranty and Support
For any questions, concerns, or technical support regarding your VLM Group 7.4V Battery Charger, please contact VLM Group LLC directly through the retailer's platform where you purchased the product. Please retain your proof of purchase for warranty claims.