YONHAN 25A Battery Charger & Maintainer User Manual

1. Introduction

The YONHAN 25A Battery Charger & Maintainer (Model: zyx-J30) is a versatile and intelligent device designed to charge and maintain a wide range of 12V and 24V batteries. This all-in-one charger is suitable for LiFePO4, Lead-Acid (AGM, GEL, SLA, Flooded), Marine, Boat, and Deep Cycle batteries. It features adjustable current levels, a booster mode, and a battery repair function to optimize battery life and performance. This manual provides essential information for safe and effective use of your YONHAN battery charger.

2. Safety Information

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

• Ventilation: Operate the charger in a well-ventilated area. Batteries can produce explosive gases.
• Eye Protection: Always wear eye protection and protective clothing when working with batteries.
• Avoid Sparks: Do not smoke or allow a spark or flame in the vicinity of the battery or charger.
• Connection Order: Connect the charger to the battery terminals before plugging it into an AC outlet. Disconnect from AC power before disconnecting from the battery.
• Protection Features: This charger is equipped with multiple intelligent protection features including Overheat Protection, Overcurrent Protection, Electric Shock Protection, Short Circuit Protection, Reverse Connect Protection, Overvoltage Protection, Low Voltage Protection, and Fire Protection.

Description: This image displays the YONHAN battery charger with icons representing its intelligent multiple protection features, including overheat, overcurrent, electric shock, short circuit, reverse connection, overvoltage, low voltage, and fire protection. These features ensure safe operation and protect both the charger and the connected battery.

3. Product Features

• Wide Compatibility: Charges and repairs all 12V and 24V lead-acid automotive, LiFePO4, marine, and deep-cycle batteries, including AGM, GEL, SLA, and Flooded types.
• Adjustable Current: Offers 5 levels of adjustable charging current (2A, 8A, 20A, 25A, and AUTO) to suit different battery capacities and charging needs.
• Booster Mode: Provides a maximum charging current for 200 seconds to assist in starting 12V batteries. The display will show "on" after 200 seconds, indicating readiness to start the vehicle.
• Digital LCD Display: Features an extra-large LCD screen that clearly displays charging status, battery voltage and current, internal temperature, charge percentage, and seasonal modes (summer/winter).
• Battery Repair Function: Includes a dedicated repair mode to help recondition and extend the life of idle, old, or uncharged batteries. Note: This function cannot repair a totally dead or severely damaged battery.
• Portable Design: Equipped with a convenient handle and a winding cable design for easy carrying and storage, keeping cables organized.

Description: This image highlights the winding cable design on the back of the YONHAN battery charger, which allows for convenient storage and organization of the power cord and clips. The power cord is also replaceable.

4. Setup

Follow these steps to set up your YONHAN battery charger:

1. Prepare the Battery: Ensure the battery terminals are clean and free of corrosion.
2. Connect to Battery: Connect the red (+) clamp of the charger to the positive (+) terminal of the battery. Connect the black (-) clamp of the charger to the negative (-) terminal of the battery. Ensure a secure connection.
3. Connect to AC Power: Plug the charger's AC power cord into a standard 100-240V AC electrical outlet. The charger's LCD display will illuminate.
4. Initial Display: The charger will automatically detect the battery voltage and display the current status.

Description: This image shows the YONHAN 25A Battery Charger with its red and black clamps, ready to be connected to a battery. The main unit features a digital display and control buttons.

5. Operating Modes

The YONHAN charger offers various modes and adjustable settings for optimal battery care.

5.1 Mode Selection

Press the MODE button to cycle through different battery types:

• Car/Boat Mode: Standard mode for most automotive and marine lead-acid batteries.
• AGM Mode: Optimized for Absorbed Glass Mat (AGM) batteries.
• LiFePO4 Mode: Specifically designed for Lithium Iron Phosphate batteries.

5.2 Current Adjustment

Press the CURRENT button to select the desired charging current:

• 2A / 8A / 20A / 25A: Manual selection of charging amperage.
• AUTO: The charger automatically selects the optimal current based on battery condition.

Description: This image illustrates the YONHAN battery charger's capability to adjust current levels, showing options for 2A, 8A, AUTO-A, 20A, and 25A, allowing users to select the most suitable charging current for their battery.

5.3 Booster Mode

The Booster mode is designed for 12V batteries that need a quick boost to start. When selected, the charging current reaches its maximum value and lasts for 200 seconds. After 200 seconds, the display will show "on", indicating the car can be started.

Description: This image shows the YONHAN battery charger's display indicating "Booster Mode" is active, with a countdown of 200 seconds. This mode provides a high current burst to assist in starting a 12V vehicle.

5.4 Repair Mode

If a battery has been idle for a long time, is old, or cannot be charged, select the REPAIR mode by long-pressing the button. This mode initiates a maintenance or soft start process to try and activate the battery and extend its life. It cannot repair a totally dead or severely damaged battery.

5.5 Digital LCD Display

The large digital LCD provides real-time information about the charging process, including:

• Charge voltage and current
• Inside temperature
• Charge percentage
• Summer mode / Winter mode (automatic detection)

Description: This image highlights the large digital LCD screen of the YONHAN battery charger, which displays various parameters such as voltage, current, temperature, and battery charge status, ensuring clear visibility even in sunlight.

6. Maintenance

Proper maintenance ensures the longevity and optimal performance of your YONHAN battery charger:

• Cleaning: Keep the charger clean and dry. Wipe down the exterior with a soft, damp cloth. Do not use harsh chemicals or abrasives.
• Storage: Store the charger in a cool, dry place when not in use. Utilize the winding cable design to keep cables neat and prevent damage.
• Connection Check: Periodically inspect the battery clamps and cables for any signs of wear, damage, or corrosion. Replace if necessary.

7. Troubleshooting

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

• Charger Displaying "OFF": This indicates that the charger is not properly connected to a battery or is not receiving AC power. Ensure both battery clamps are securely attached and the power cord is plugged into a live outlet.
• Incorrect Voltage Reading: Verify that the charger clamps are correctly connected to the battery terminals (positive to positive, negative to negative). Also, ensure the correct battery type mode (Car/Boat, AGM, LiFePO4) is selected.
• Battery Not Charging: If the battery is severely discharged or damaged, the charger may not initiate charging in standard modes. Try using the REPAIR mode. Note that the repair function cannot revive a totally dead battery or one with severe internal damage.
• Error Detection: The charger features intelligent error detection. If an incorrect connection (e.g., reverse polarity) is made, the charger will alert you to prevent damage. Correct the connection immediately.

8. Specifications

Description: This image illustrates the 8-stage smart charging process of the YONHAN battery charger, detailing each stage from battery desulphation to re-start charge, ensuring a comprehensive and efficient charging cycle.

9. Warranty & Support

For warranty information, technical support, or any inquiries regarding your YONHAN 25A Battery Charger & Maintainer, please contact YONHAN customer service through their official channels or the retailer where the product was purchased.