This car battery charger, with 84% more power and low-voltage detection down to 1-volt, suits drained or idled 12v lead-acid batteries including STD/DEEP CYCLE, AGM, and GEL. Fully automatic and manual options and pre-set memory function ensure more convenient and more effective charging. Optimized HD LCD helps you monitor your battery status, charging data & charging stages, and troubleshoot in time. Full-wrapped pure copper battery clips with 1.38-inch/35mm openings and firmer cover matter in your side-posts connection. ETL-listed, smart-chip-controlled, safe enough to use without worrying about Spark/Overtime Charging/Overheating/Reverse Polarity/Over-discharge/Current Backflow/Short Circuit/Over Voltage/Over Current. Equipped with an intelligent 8-stage charging program for added charging precision, battery power optimization, and extended battery life. The engine start aid can urgently activate your low-voltage battery and start your vehicle in 100 seconds. The 12v battery charger, adopting 0.2-volt more than its normal charging voltage, boosts your battery activity, then charges more precisely and thoroughly in extremely cold weather. Auto-stop when fully charged, auto-awake and pulse compensate when voltage drops allow a long-time connection.