YONHAN Battery Charger 20A 12V/24V automotive battery charger

This 12V/24V automatic battery charger delivers up to 20A for 12V systems and 10A for 24V systems, making it a practical solution for charging, maintaining and repairing a range of vehicle and deep-cycle batteries. It is suited for cars, trucks, ATVs, boats and lawn equipment where faster recharge and smart maintenance are needed, and it includes a winter mode to help preserve batteries during cold storage.

Key Points

The charger works with multiple battery chemistries including LiFePO4 and various lead-acid types such as AGM, GEL, EFB, SLA and flooded batteries. It features a seven-stage charging process with automatic transition to trickle/float maintenance after a full charge, which helps keep batteries topped up over long idle periods. According to the manufacturer, built-in protections cover reverse polarity, overcurrent, overheating, short circuits and sparks-free connections. The device is not a jump starter and requires connection to an AC outlet to operate.

Technical Specifications

• Name: YONHAN Battery Charger 20A 12V/24V LiFePO4
• Input: 100-240V 50/60Hz, max 300W
• Output: 12V 20A, 24V 10A
• Charging stages: 7-stage automatic with trickle/float maintenance
• Compatible batteries: LiFePO4, AGM, GEL, EFB, SLA, flooded (WET), Calcium, deep-cycle

Benefits

The higher 20A output for 12V systems charges faster than typical 6A or 10A chargers, reducing downtime between uses and shortening recovery after deep discharges. The repair mode uses high- and low-frequency pulse technology to attempt reactivation of sulfated or idle batteries, which may extend service life when the battery still has some residual capacity. A large LCD makes it easy to monitor voltage, current, charge percentage and mode at a glance, even in daylight.

Usage Recommendations

Before using the unit verify battery voltage and select the correct mode for the battery chemistry. Use winter mode when temperatures are low to let the charger adjust the charge rate and avoid overdriving the battery in colder conditions. Keep in mind that repair mode cannot restore batteries that are completely dead or physically damaged, and the charger will not operate on batteries with voltages below approximately 0.3V. Place the charger in a ventilated location to allow the internal cooling fan to function and reduce the risk of overheating.