FOXSUR 12V/15A 24V/5A Smart Battery Charger User Manual

1. Introduction

Thank you for choosing the FOXSUR FAC-150 Smart Battery Charger. This intelligent charger is designed for a wide range of 12V and 24V batteries, offering multiple charging modes, pulse repair, and advanced protection features. Please read this manual thoroughly before use to ensure safe and optimal operation.

FOXSUR 12V/15A 24V/5A Smart Battery Charger with digital display and battery clamps. — Figure 1: FOXSUR Smart Battery Charger (Model FAC-150)

2. Safety Information

Always prioritize safety when operating electrical equipment. Failure to follow these instructions may result in electric shock, fire, or serious injury.

Read all instructions before using the charger.
Use the charger in a well-ventilated area.
Do not expose the charger to rain or wet conditions.
Ensure the charger is disconnected from the power supply before making or breaking connections to the battery.
Avoid sparks or flames near the battery; batteries can produce explosive gases.
Wear eye protection and protective clothing when working with batteries.
Keep out of reach of children.
Do not charge frozen batteries.
Do not use the charger if it has been dropped or damaged.

⚠ 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.

3. Product Overview

3.1 Key Features

Smart Charging: Automatic detection of battery voltage (12V/24V) and adjustment of charging current (15A for 12V, 5A for 24V).
10-Stage Charging Process: Optimized charging for battery longevity and performance.
Multiple Charging Modes: Dedicated modes for various battery types including CAR, AGM, CA, LiFePo4, MOTO, Repair, and Supply.
Intelligent Digital Display: Real-time monitoring of battery power, voltage, current, temperature, and charging status.
Pulse Repair Function: Advanced recovery mode for desulphating and restoring old, idle, damaged, or stratified batteries.
Auto Temperature Detection: Adjusts charging voltage based on ambient temperature for efficient charging in winter and summer.
Durable Construction: High-temperature resistant, corrosion-resistant ABS case with pure copper soft core wires and fully wrapped crocodile clamps for safety and durability.
Charge Down to Zero Volts: Capable of charging deeply discharged batteries as low as 5V using the supply mode.

3.2 10-Stage Charging Process

The charger employs a sophisticated 10-stage charging process to ensure optimal battery health and charge efficiency:

Diagnosis
Battery desulphation
Pre-charging
Soft start charging
Bulk charging
Constant current charging
1/2 Constant current charging
Absorption charging
Float charging
Re-start charge after battery discharged

Diagram illustrating the 10-stage charging process of the FOXSUR battery charger, including diagnosis, desulphation, pre-charging, soft start, bulk, constant current, 1/2 constant current, absorption, float, and re-start stages. — Figure 2: 10-Stage Charging Process

4. Specifications

Diagram showing the dimensions and key specifications of the FOXSUR FAC-150 battery charger, including size, cable lengths, output/input voltage/current, net weight, and application scope. — Figure 3: Product Parameters

Parameter	Value
Product Model	FAC-150
Dimensions (L x W x H)	195mm x 190mm x 135mm
Output Cable Length	Approx. 85cm
Input Cable Length	Approx. 200cm
Output Voltage	DC 12V - 24V
Input Voltage	AC 100-240V 50/60Hz
Output Current	DC 12V/15A, 24V/5A
Net Weight	1005g (approx. 1.0 kg)
Item Weight (from product data)	1.3 kg
Material	PC (Polycarbonate), ABS
Special Features	Smart charger, Pulse Repair, Auto Temperature Detection
Applicable Battery Capacity	4AH - 250AH
Compatible Battery Types	Lead-acid (GEL, SLA, WET, Deep-Cycle, EFB), Start-Stop, LiFePo4, AGM, CA

5. Setup and Installation

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 General Connection Steps

Step 1: Plug the battery charger into a household 110/220V power supply.
Step 2: Connect the battery with the alligator clips. The RED clip connects to the positive (+) terminal of the battery, and the BLACK clip connects to the negative (-) terminal of the battery.
Step 3: Press the MODE button to select the appropriate charging mode/current for your battery type. The charger will then begin working.

Three-step visual guide on how to use the FOXSUR battery charger: 1. Plug into power, 2. Connect alligator clips, 3. Select mode and start charging. — Figure 4: Basic Connection and Operation Steps

5.2 Connecting 12V Batteries

For a single 12V battery:

Plug the charger into a household 110/220V power supply.
Select the corresponding 12V charging mode.
Connect the RED clamp to the positive (+) pole of the 12V battery.
Connect the BLACK clamp to the negative (-) electrode of the 12V battery.
Charging will start automatically.

5.3 Connecting 24V Batteries

For 24V systems, you typically connect two 12V batteries in series:

Connect two 12V batteries in series (connect the positive terminal of one battery to the negative terminal of the other).
Plug the charger into a household 110/220V power supply.
Select the corresponding 24V charging mode.
Connect the RED clamp to the positive (+) pole of the first 12V battery (which is the positive end of the series connection).
Connect the BLACK clamp to the negative (-) electrode of the second 12V battery (which is the negative end of the series connection).
Charging will start automatically.

Two-panel image showing connection steps for 12V batteries (parallel) and 24V batteries (series) with the FOXSUR charger. — Figure 5: 12V and 24V Battery Connection Diagrams

6. Operating Instructions

6.1 Selecting Charging Modes

After connecting the charger to the battery and power, use the "MODE" button to cycle through the available charging programs. The intelligent display will show the selected mode.

CAR Mode: For standard 12V/24V GEL, SLA, WET, DEEP CYCLE, EFB batteries.
AGM Mode: Specifically for 12V/24V AGM batteries.
CA Mode: For 12V/24V Calcium batteries.
LiFePo4 Mode: For 12V/24V Lithium Iron Phosphate batteries.
MOTO Mode: For 12V/24V Motorcycle batteries.
REPAIR Mode (16 hours): An advanced recovery mode designed to repair and restore old, idle, damaged, or stratified batteries. This process can take up to 16 hours.
SUPPLY Mode (12V Power Supply): Used for charging batteries with a voltage lower than 5V, or to convert the charger into a DC power supply for powering 12VDC devices (e.g., DC fan, oil changer), or as a memory retainer when replacing a battery. This mode is crucial for charging deeply discharged batteries.

Image showing the FOXSUR charger's multiple charging modes for CAR, AGM, CA, LiFePo4, MOTO batteries, and Repair/Supply modes. — Figure 6: Multiple Charging Modes

6.2 Intelligent Display

The charger features an intelligent display that provides real-time information about the charging process:

Battery Power: Shows the current charge level of the battery.
Charge Voltage: Displays the current charging voltage (e.g., 12.6V, 24.0V).
Charge Current: Indicates the current flowing into the battery (e.g., 15.0A).
Temperature: Shows the ambient temperature, which influences the automatic voltage adjustment.
Mode Indicator: Displays the active charging mode (e.g., CAR, MOTO, REPAIR, SUPPLY).
Error Indicator: "ERO" will be displayed if an error occurs (e.g., reverse polarity, short circuit).
Battery Full: "FUL" indicates that the battery is fully charged.

Close-up of the FOXSUR charger's intelligent display showing real-time charging status, including battery power, charge voltage, charge current, repair mode, error codes, and battery full indication. — Figure 7: Intelligent Display Details

6.3 Auto Temperature Detection

The charger automatically detects the ambient temperature and adjusts the charging voltage accordingly. This ensures optimal charging performance and prevents overcharging or undercharging in extreme temperatures.

Winter Model: Adjusts for colder temperatures (e.g., 10°C).
Summer Model: Adjusts for warmer temperatures (e.g., 28°C).

Image depicting the FOXSUR charger's auto temperature detection feature, showing different charging voltages for winter (10°C) and summer (28°C) models. — Figure 8: Auto Temperature Detection

6.4 Charging Deeply Discharged Batteries

The charger can revive dead batteries with voltages as low as 5V. Use the "SUPPLY" mode to manually initiate charging for these deeply discharged batteries.

Image demonstrating the FOXSUR charger's ability to charge dead batteries as low as 5-volt using the all-new supply mode. — Figure 9: Charging Low Voltage Batteries

7. Maintenance

Keep the charger clean and dry. Wipe with a soft, damp cloth. Do not use solvents.
Regularly inspect the charging cables and clamps for any damage, fraying, or corrosion. Replace if necessary.
Ensure the ventilation openings are clear of dust and debris to maintain proper heat dissipation.
Store the charger in a cool, dry place when not in use.

Internal view of the FOXSUR charger highlighting the pure copper motor and fan cooling system for heat dissipation. — Figure 10: Internal Cooling System for Maintenance Reference

8. Troubleshooting

If you encounter issues with your FOXSUR charger, refer to the following common problems and solutions:

Problem	Possible Cause	Solution
Charger not turning on / No display	No power from outlet; loose power connection.	Check power outlet with another device. Ensure power cable is securely plugged into charger and wall.
"ERO" displayed on screen	Reverse polarity connection; short circuit; battery fault.	Disconnect immediately. Check if RED (+) and BLACK (-) clamps are connected correctly. Inspect cables for damage. Test battery condition.
Battery not charging	Incorrect mode selected; battery deeply discharged (below 5V); faulty battery.	Ensure correct mode is selected for your battery type. For deeply discharged batteries, try "SUPPLY" mode. If still no charge, the battery may be beyond repair.
Charger gets hot	Normal operation (some heat is expected); poor ventilation; blocked fan.	Ensure adequate ventilation around the charger. Check if fan or vents are obstructed. If overheating persists, discontinue use and contact support.

9. User Tips

For optimal battery life, use the appropriate charging mode for your specific battery chemistry (e.g., AGM for AGM batteries, LiFePo4 for lithium).
The "Repair" mode can be very effective for older batteries, but it's a long process (up to 16 hours). Be patient and allow it to complete.
If you're unsure about your battery type or condition, consult a professional or refer to your battery's manufacturer specifications before charging.
The automatic temperature compensation is a great feature; ensure the charger is in an environment where it can accurately sense the ambient temperature.

10. Warranty and Support

The FOXSUR FAC-150 Smart Battery Charger comes with a standard manufacturer's warranty against defects in materials and workmanship. For warranty claims, technical support, or service inquiries, please contact your retailer or the manufacturer directly. Keep your proof of purchase for warranty validation.

Please refer to the official FOXSUR website or your purchase documentation for specific warranty terms and contact information.