Age recommended by manufacturer: 14 years and upFor lead-acid batteries 2 V/6 V/12 V with 2 ... 20 Ah Compact charger with lightweight switched-mode power supply for quickly charging 2 V, 6 V or 12 V drive, ignition and starter batteries Automatic voltage detection and charging current adjustment from 0.2 to 1 A Charge monitor LED: red: battery charging; green: battery fully charged; off: no battery connected