Microcomputer-controlled smart charger with automatic charging to prevent overcharging. Charging efficiency exceeds 85%. Features winter and summer modes that automatically adjust charging voltage based on temperature to prevent overcharging or undercharging. Includes repair mode to restore deeply discharged and sulfated batteries. Desulfurization mode is suitable for GEL, Standard, and AGM batteries. Digital LCD display shows voltage, current, and temperature, allowing real-time monitoring of battery status during charging. Equipped with safety protections including reverse connection, short circuit, overload, overvoltage, and overtemperature protection. Built-in cooling fan ensures stable operation. Designed for 12V lead-acid batteries with capacities from 6 to 120AH. Compatible with car, SUV, RV, motorcycle, motorboat, and lawn mower batteries. Supports SLA, WET, DEEP CYCLE, EFB, calcium, GEL, AGM, and motorcycle batteries. Do not use with lithium batteries.