1. Introduction
The FOXSUR FBC122408D is a fully automatic, intelligent pulse repair battery charger designed for a wide range of 12V and 24V lead-acid batteries, including Calcium, GEL, AGM, Wet, and EFB types. It features a 3-stage charging process to protect your battery from overcharging and can help restore drained and sulfated batteries. The charger incorporates microprocessor control (CPU) for precise operation and an intelligent digital display for real-time monitoring of charging status.

2. Safety Information
⚠ WARNING: This product can expose you to chemicals including lead, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.
- Always ensure proper ventilation when charging batteries.
- Avoid open flames or sparks near the battery during charging.
- Wear appropriate personal protective equipment, such as safety glasses and gloves.
- Do not attempt to charge non-rechargeable batteries.
- Keep the charger away from water and moisture.
- Disconnect the power supply before making or breaking connections to the battery.
- Do not open or modify the charger. Refer all servicing to qualified personnel.
3. Product Overview and Features
The FOXSUR FBC122408D charger is equipped with advanced features for efficient and safe battery charging and maintenance.
3.1. Key Features
- Microprocessor Control (CPU): Ensures precise and optimized charging.
- 3-Stage Automatic Charging: Prevents overcharging and extends battery life.
- Pulse Repair Technology: Helps restore drained and sulfated batteries.
- Intelligent Digital Display: Provides real-time information on charging status.
- Automatic Temperature Compensation: Adjusts charging voltage based on ambient temperature (winter/summer modes).
- Multiple Charging Modes: Supports various battery types and applications.
- Comprehensive Protection: Built-in safeguards for safe operation.
3.2. Multi-Protection System

The charger includes the following safety protections:
- Overheat Protection
- Overcurrent Protection
- Electric Shock Protection
- Short Circuit Protection
- Reverse Connection Protection
- Overvoltage Protection
- Low Voltage Protection
- Fire Protection
3.3. Intelligent Digital Display

The LCD screen displays:
- Battery charge level (20%, 40%, 60%, 80%, 100%)
- Charging status (FULL, ERROR, REPAIR)
- Current (A)
- Voltage (V)
- Temperature (°C)
3.4. Automatic Temperature Detection

The charger automatically detects the ambient temperature and adjusts the charging voltage accordingly, providing optimal charging in both winter (e.g., 10°C) and summer (e.g., 28°C) conditions.
3.5. Multiple Charging Modes

The charger supports various modes for different battery types and applications:
- CAR/TRUCK Mode: For standard automotive batteries.
- AGM Mode: Specifically for Absorbed Glass Mat batteries.
- MOTORCYCLE Mode: For smaller motorcycle batteries.
- REPAIR Mode: For pulse reconditioning and battery maintenance.
3.6. Wide Range of Applications

This smart battery charger is suitable for:
- All types of vehicles (cars, trucks)
- Boats and motorboats
- Motorcycles
- RVs
- Engineering vehicles
- Start-up and backup lead-acid batteries
Note: This charger is not suitable for lithium batteries.
3.7. Quality Construction

The charger features pure copper soft core wire and fully wrapped crocodile clamps for cold and frost resistance, ensuring safety and durability.
4. Specifications

| Feature | Description |
|---|---|
| Model | FBC122408D |
| Input Voltage | 100-240V AC, 50-60Hz |
| Rated Output | 12V 8A, 24V 4A |
| Output Voltage Range | DC 14.6V - 29.2V |
| Output Peak Current | 8A |
| Minimum Start Voltage | 2.0V |
| Battery Range | 6-150Ah |
| Thermal Protection | 65°C +/- 5°C |
| Efficiency | Approx. 85% |
| Cooling | Fan |
| Dimensions (L x W x H) | 170 x 98 x 58mm |
| Net Weight | 590g |
| Output Line Length | 65cm |
| Input Line Length | 110cm |
| Applicable Battery Types | Lead-acid batteries (Calcium, GEL, EFB, Deep Cycle, AGM) |
| Incompatible Battery Types | Lithium batteries |
5. Setup
Before connecting the charger, ensure the battery terminals are clean and free of corrosion. Always connect the charger to the battery before plugging it into the AC power outlet.
5.1. Connecting to a 12V Battery

- Plug the charger's AC power cord into a household 230V power supply (or 220V as indicated in the image for 24V setup, ensure local voltage compatibility).
- Select the corresponding charging mode (e.g., CAR/TRUCK, AGM, MOTORCYCLE) using the 'MODE' button.
- Connect the red clamp to the positive (+) pole of the 12V battery.
- Connect the black clamp to the negative (-) electrode of the 12V battery.
- The charger will automatically begin charging.
5.2. Connecting to a 24V Battery
- If using two 12V batteries for a 24V system, connect them in series first.
- Plug the charger's AC power cord into a household 220V power supply (ensure local voltage compatibility).
- Select the corresponding charging mode (e.g., CAR/TRUCK, AGM, MOTORCYCLE) for 24V.
- Connect the red clamp to the positive (+) pole of the battery series.
- Connect the black clamp to the negative (-) electrode of the battery series.
- The charger will automatically begin charging.
6. Operating Instructions
The FOXSUR FBC122408D charger is designed for ease of use with its intelligent features.
6.1. Power On and Mode Selection
- After connecting the battery and plugging in the charger, the LCD display will light up.
- Press the 'MODE' button (often indicated by a fingerprint icon) to cycle through the available charging modes: CAR/TRUCK, AGM, MOTORCYCLE, and REPAIR. Select the mode appropriate for your battery type and voltage.
- The charger will automatically detect the battery voltage (12V or 24V) and the ambient temperature to adjust charging parameters.
6.2. Monitoring Charging Status
The intelligent digital display provides real-time feedback:
- Battery Icon: Shows the approximate charge level (20% to 100%).
- Voltage (V): Displays the current battery voltage.
- Current (A): Shows the charging current.
- Temperature (°C): Indicates the ambient temperature, influencing the charging profile.
- Status Indicators: 'FULL' indicates charging is complete, 'ERROR' indicates a fault, and 'REPAIR' indicates the pulse repair function is active.
6.3. Pulse Repair Function
To activate the pulse repair function, select the 'REPAIR' mode. This mode uses high and low frequency pulse technology to help desulfate and recondition old or deeply discharged batteries, potentially extending their lifespan. Monitor the display for 'REPAIR' status.
6.4. Automatic Shut-off
The charger will automatically stop charging once the battery is fully charged (indicated by 'FULL' on the display) to prevent overcharging. It also features multiple protections that will cut off power in case of faults like short circuits or overheating.
This video demonstrates the charger's features, including touch key sensitivity, silent fan operation, full package crocodile clamps, pulse repair function, winter-summer charging mode, intelligent digital display, multiple protection mechanisms, and wide range of vehicle adaptations.
7. Maintenance
- Cleaning: Keep the charger and its cables clean and dry. Wipe with a soft, dry cloth. Do not use solvents or abrasive cleaners.
- Storage: Store the charger in a cool, dry place when not in use. Ensure cables are neatly coiled and not kinked.
- Cable Inspection: Regularly inspect the charging cables and clamps for any signs of damage, wear, or corrosion. Replace if necessary.
- Ventilation: Ensure the charger's cooling fan and vents are free from dust and obstructions to maintain optimal performance and prevent overheating.
8. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Charger not turning on | No AC power, faulty outlet, loose connection. | Check AC power supply, try a different outlet, ensure power cord is securely plugged in. |
| Display shows 'ERROR' | Reverse polarity, short circuit, battery voltage too low/high, internal fault. | Check battery connections for correct polarity. Inspect clamps and cables for shorts. Ensure battery voltage is within acceptable range (min 2.0V). If error persists, contact support. |
| Battery not charging | Incorrect mode selected, poor connection, severely damaged battery. | Verify correct charging mode for your battery type. Ensure clamps have good contact with battery terminals. Battery may be beyond repair; consult a professional. |
| Charger gets hot | Normal during operation, but excessive heat indicates poor ventilation or overload. | Ensure charger is in a well-ventilated area. Check for blocked cooling vents. If overheating persists or is accompanied by smoke/smell, disconnect immediately and contact support. |
| Pulse Repair not working | Battery too damaged, incorrect mode. | Ensure 'REPAIR' mode is selected. Note that not all batteries can be fully recovered. |
9. User Tips
- For optimal battery health, use the pulse repair function periodically, especially for older batteries or those that have been deeply discharged.
- Always ensure the charger is placed on a stable, non-flammable surface during operation.
- If charging a battery installed in a vehicle, consult your vehicle's owner's manual for specific instructions and precautions.
- The automatic temperature compensation feature is crucial; ensure the charger is exposed to the same ambient temperature as the battery for accurate charging.
- While the charger has multiple protections, it's good practice to periodically check the charging progress on the LCD display.
10. Warranty and Support
For warranty information, technical support, or service inquiries, please refer to the documentation provided with your purchase or contact the seller directly. Keep your proof of purchase for any warranty claims.





