The Abso Charger is an optimal charging and maintenance for your deep cycle batteries. It provides multi-stage battery chargers ensure that your batteries are charged the way manufacturers recommend small footprint, extremely compact design and ideal chargers for boaters and RV'ers that do dry camping. KISAE Technology AC 1220 Abso Charger 20A benefits include faster charge for your batteries, 3 models to choose from: 20A ( 400 Ah batteries), travel abroad and use anywhere (accept 90-225 VAC input) and optional remote allows you to view system information anywhere. Some products features are microprocessor controlled multi-stage charging algorithms: bulk, absorption and float, settings for gel, flooded, AGM and LiFePO4 batteries, battery equalization feature, universal input voltage is compatible with generators and 3 battery bank charging.