The PRO600L battery charger is perfect all round battery charger for charging batteries found in passenger vehicles, jet skis, motorcycles and garden equipment. The PRO600L can also be used to maintain batteries up to 180Ah making it ideal for maintaining vehicles that spend extended amounts of time without being driven including classic cars, motorcycles and boats. 9-Stage Battery Charging. Boost battery performance and increase the life of your batteries. Selectable Battery Types. Selectable Charge Rate. The charger can also be used to maintain batteries up to 120Ah. The PRO600L battery charger and maintainer utilises state of the art patented 9 stage technology for charging various types of 12V batteries. The PRO600L can also be used to maintain a wide range of batteries and features a patented repair and rejuvenation mode for lead-acid type batteries which breaks down heavily desulphated cells revitalising the battery increasing battery life and performance. 1A Maintenance mode will charge smaller batteries between 3Ah and 20Ah and will maintain batteries up to 100Ah. 4A Silent charge mode will charge mid-sized batteries between 12Ah and 80Ah and will maintain batteries up to 120Ah. 6A Rapid charge mode will charge batteries between 18Ah and 120Ah and will maintain batteries up to 180Ah. This setting will give you the fastest charge possible.