The charger OC-PRO150 Battery Charger and Maintainer is designed for lead-acid sealed batteries (AGM, Gel & Wet) from 5Ah to 35Ah. The charger can also be used to maintain batteries up to 120Ah. KEY FEATURES 100% automatic smart battery charger & maintainer with reconditioning. The battery charger is easy to use and requires no technical experience. Microprocessor controlled with safety timers at every stage. Battery condition analysis. Patented battery rejuvenation (reconditioning). Battery voltage retention analysis. Pulse charge for long term maintenance. Ultra lower power consumption (ECO Mode). Multi Stage:1 - Qualification - Battery condition check2 - Battery rejuvenation (recondition mode)3 - Soft start charging4 - Bulk charging5 - Absorption charging6 - Battery analysis7 - Float mode 8 - Long term maintenance pulse charge Automatic diagnosis and charge: On power up, the charger will automatically diagnose the battery condition and determine if the rejuvenation mode (reconditioning) or charge cycle is required. Patented battery rejuvenation technology: The charger has a unique and patented rejuvenation feature which uses high voltage equalising and peak pulse reconditioning to repair sulphated batteries. This feature is fully automatic and depends on the internal impedance of the battery. It also depends on whether the battery is still connected in the vehicle. Can be left on 24/7 to ensure your battery is always maintained and fully charged: The battery charger can be left unattended and left permanently connected all year round. The intelligent charger will monitor the battery voltage and will maintain it at peak performance with a special pulse charge during long term maintenance. Short circuit and reverse polarity protection. Heavy-duty and corrosion-resistant output connectors. Crocodile clips & ring terminal harness: It comes with a quick connect fly lead and heavy duty, fully insulated crocodile clip harness. Rapid Charge Mode: Uses maximum charging current to ensure the fastest charge time. You may here the fan turn on during this mode. Silent Charge Mode: Charges at a slightly reduced charge rate so the cooling fan is not required. Maintenance Mode: Ideal and recommended for long term maintenance charging or for charging smaller batteries.