Schumacher SC1304 Fully Automatic Battery Charger Maintainer, and Auto Desulfator with Battery Detection - 15 Amp/3 Amp, 6V/12V - For Cars, Trucks

RELIABLE POWER: Delivers 15 Amp charge or 3 Amp maintain to your car, truck, SUV, boat, or RV battery; compatible with standard, AGM, and lithium LiFePO4 batteries
SMART CHARGING: Microprocessor-controlled automatic amperage rate adjustment and multi-stage charging for added precision, safety, and battery life
VOLTAGE DETECTION: Automatically detects 6V or 12V batteries
CONNECT IT AND FORGET IT: Maintains battery when fully charged and resumes continuous charging when battery becomes discharged
SAFE AND RELIABLE: Reverse hook-up protection prevents the charger from operating if the clamps are reversed