4 Stage 6/12V 4A Battery Charger w/ LCD DisplayAn intelligent 4 stage maintenance charger for 6 or 12 volt lead acid batteries. Maintains and extends battery life by constantly monitoring and correctly charging the battery indefinitely across four stages: pre charge, constant current, constant voltage and float charge. Select from four charging modes, including: 6V 1A (slow), 12V 1A (slow), 12V 4A (fast), and 12V 4A (low temperature). The LCD interface clearly displays modes and measurement