[15A Smart LiFePO4 Battery Charger, Effortless Charging] The ultimate 15A LiFePO4 & lead-acid battery charger for cars, RVs, boats, and power sports. Automatically detects voltage (12V/15A or 24V/8A) and battery type—compatible with LiFePO4, AGM, gel, and flooded lead-acid batteries. Just plug it in, and let the charger do the rest! Features one-touch operation with charge/maintain/desulfate/float modes for peak performance. [Upgraded 9-Stage Trickle Charge & Maintenance/Pulse Repair] Our advanced battery trickle charger features a pulse repair function to reactivate your battery. With built-in battery protection technology, it ensures fast and safe charging, while trickle charging provides the final safeguard for a full charge.(Note: This function cannot repair a completely dead battery) [All-in-One Safety Protection – Charge with Confidence] YONHAN 12V/24V Battery Charger features a built-in multi-protection system, safeguarding against reverse polarity, short circuits, overcharging, overheating, over-voltage, and over-current. With these comprehensive safety measures, you can charge your devices with confidence and peace of mind. The Must-Have Garage Essential – Powerful, safe, and fully automatic for professionals and DIYers alike! [Smart Charging with Memory Function] Car battery charger mode has automatic memory function, remembers your last mode for convenience. Note: Power connection is required, Input voltage :110-230V (50-60Hz), output voltage/current :12V-15.5V/24V-31V (-15°C~45°C automatic voltage compensation), Output current: DC 12V15A/24V8A (Max).The must-have tool for your garage. [Climate-Adaptive Trickle Charger] This car battery trickle charger is optimized for climate conditions, enabling it to effortlessly handle a variety of over - cooling and over - heating voltage environments.To maintain the battery during winter, switch to the float/trickle charge mode as follows: Select the appropriate mode (STD/AGM, GEL/WET, or MOTORCYCLE) to fully charge the battery. The screen will display "FUL". Then, switch to the "MOTORCYCLE" mode. The charger will automatically enter trickle charging mode, keeping the battery charged for an extended period. 15-Amp Fully-Automatic Smart Charger