1. Introduction
Thank you for choosing the FOXSUR FBC122408D Automatic Battery Charger and Maintainer. This device is designed for charging and maintaining 12V and 24V lead-acid batteries (AGM, GEL, MF, SLA, VRLA) with capacities ranging from 4AH to 120AH. It features intelligent LCD digital display, 3-stage automatic charging, pulse repair function, and multiple safety protections to ensure efficient and safe battery management.
Important: This charger is strictly prohibited for charging lithium batteries.
Figure 1: FOXSUR FBC122408D Battery Charger overview, showing the main unit, battery clamps, and AC power plug.
2. Safety Instructions
Please read and understand all safety information before using this product. Failure to follow these instructions may result in electric shock, fire, or serious injury.
- Lithium Batteries: DO NOT use this charger for lithium batteries. It is designed exclusively for 12V/24V lead-acid batteries (AGM, GEL, MF, SLA, VRLA).
- Ventilation: Ensure the charging area is well-ventilated. Batteries can produce explosive gases during charging.
- Eye and Skin Protection: Always wear eye protection and protective clothing when working with batteries. Battery acid is corrosive.
- Sparks and Flames: Keep sparks, flames, and smoking materials away from the battery and charger.
- Disconnect Power: Always disconnect the AC power supply from the charger before connecting or disconnecting the battery clamps.
- Correct Polarity: Connect the red clamp to the positive (+) battery terminal and the black clamp to the negative (-) battery terminal. Reverse polarity protection is built-in, but correct connection is essential.
- Damaged Equipment: Do not operate the charger if it has been damaged in any way. Contact customer support.
- Children and Pets: Keep the charger and battery out of reach of children and pets.
- Indoor Use: This charger is intended for indoor use. Do not expose it to rain or excessive moisture.
3. Product Components
The FOXSUR FBC122408D Battery Charger package includes the following items:
- FOXSUR FBC122408D Battery Charger Unit
- Battery Clamps (Red for Positive, Black for Negative)
- AC Power Cord
- User Manual (this document)
4. Setup
- Prepare the Battery: Ensure the battery terminals are clean and free of corrosion. If necessary, clean them with a wire brush.
- Connect Battery Clamps:
- Connect the RED positive (+) clamp to the positive (+) terminal of the battery.
- Connect the BLACK negative (-) clamp to the negative (-) terminal of the battery.
Ensure a secure connection. The charger has reverse polarity protection, but correct connection is always recommended.
- Connect to AC Power: Plug the charger's AC power cord into a standard wall outlet (100-240V AC). The charger will power on and display information on the LCD screen.
Figure 2: The FOXSUR charger connected to a 24V battery, illustrating the correct clamp connections.
5. Operating Instructions
5.1. Intelligent LCD Digital Display
The LCD screen provides real-time information about the charging process. It automatically cycles through displaying temperature, charging voltage, charging current, and battery power level.
Figure 3: The LCD display showing various parameters such as charge voltage, charge current, temperature, and battery power percentage.
- Voltage (V): Displays the current charging voltage.
- Current (A): Displays the current charging amperage.
- Temperature (°C): Shows the ambient temperature, which influences the charging mode.
- Battery Power: Indicates the estimated battery charge level in percentage.
- Battery Type: Automatically detects 12V or 24V battery.
5.2. Automatic Charging Process
Once connected, the charger automatically detects the battery voltage (12V or 24V) and begins a 3-stage charging process:
- Desulfation: Initial stage to break down sulfates that may have built up on the battery plates.
- Bulk Charge: Charges the battery to approximately 80% capacity at the maximum current.
- Absorption Charge: Charges the battery to 100% at a decreasing current.
- Float Charge: Maintains the battery at full charge by providing a small, constant voltage.
5.3. Mode Selection
Press the "MODE" button to cycle through different charging modes:
- Car/Truck Mode: Standard charging for 12V/24V car and truck batteries.
- AGM Mode: Optimized charging for AGM batteries.
- Motorcycle Mode: Lower current charging for 12V motorcycle batteries.
- Repair Mode: Pulse repair function for deeply discharged or sulfated batteries.
Figure 4: The charger's display indicating the selectable charging modes.
5.4. Temperature Compensation (Summer/Winter Mode)
The charger automatically detects the ambient temperature and adjusts the charging voltage accordingly to optimize charging efficiency and prevent overcharge or undercharge.
- Summer Mode: Activated above 28°C to prevent overcharging in hot conditions.
- Winter Mode: Activated below 10°C to ensure adequate charging in cold conditions.
Figure 5: Illustration of the automatic temperature detection and corresponding Summer/Winter charging modes.
5.5. Disconnecting the Charger
- Unplug the AC power cord from the wall outlet.
- Disconnect the black negative (-) clamp from the battery.
- Disconnect the red positive (+) clamp from the battery.
6. Maintenance
- Cleaning: Clean the charger casing with a soft, dry cloth. Do not use solvents or abrasive cleaners. Ensure the charger is unplugged before cleaning.
- Storage: Store the charger in a cool, dry place when not in use. Keep the cables neatly coiled.
- Pulse Repair Function: Utilize the "Repair Mode" periodically for deeply discharged or sulfated lead-acid batteries to help restore battery performance and extend lifespan. This function is not a guarantee of full battery recovery.
- Cable Inspection: Regularly inspect the power cord and battery clamps for any signs of damage. Do not use if damaged.
7. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Charger does not power on. | No AC power; faulty outlet; damaged power cord. | Check AC power connection and outlet. Inspect power cord for damage. |
| Charger not charging battery. | Incorrect battery connection (reverse polarity); battery is severely damaged; battery type incompatible (e.g., lithium). | Ensure correct clamp connection. Verify battery type is lead-acid. If battery is severely damaged, it may not accept a charge. |
| Display shows error or protection icon. | Short circuit; reverse polarity; overcharging; over-current; overheating. | Disconnect charger from AC and battery. Check connections for short circuits. Reconnect correctly. Allow charger to cool if overheating. |
| Battery not fully charged after extended time. | Battery capacity too large for charger; battery is old or damaged; incorrect mode selected. | Ensure battery capacity is within 4AH-120AH. Consider using Repair Mode for sulfated batteries. Battery may need replacement. |
If troubleshooting steps do not resolve the issue, please contact customer support.
8. Specifications
| Model | FBC122408D |
| Input Voltage | 100-240V AC, 50/60Hz (Typical for universal chargers) |
| Output Voltage | 12V / 24V DC (Auto-detection) |
| Output Current | 12V 8A, 24V 4A |
| Battery Capacity | 6AH - 150AH (Lead-Acid Batteries only) |
| Battery Types | AGM, GEL, MF, SLA, VRLA (Lead-Acid) |
| Protection Features | Reverse Polarity, Short Circuit, Overcharge, Over-current, Overheat, Open-circuit |
| Dimensions | 17 x 9.8 x 5.8 cm |
| Weight | 662 g |
9. Warranty and Customer Support
FOXSUR is committed to providing quality products and customer service. While specific warranty details are not provided in this manual, if you encounter any issues or have questions regarding your FOXSUR FBC122408D Battery Charger, please contact our customer support team.
For assistance, please refer to the contact information provided with your purchase or visit the official FOXSUR website.
