The automatic 1.5-amp SEM-1562A Battery Charger from Schumacher Electric Corp. maintains both 6V and 12V batteries with auto-voltage detection and keeps batteries fully charged using microprocessor-controlled technology. This innovated technology uses multi-stage charging, automatically switching from full charge to float-mode monitoring. LEDs indicates three modes including "Charged," "Charging" or "Trouble." A quick-disconnect harness snaps either connector into place in seconds.