The Battery Tender 5-Bank charger is a top-of-the-line 12 volt 2.0 amp per circuit charger, perfect for automotive, motorcycle and marine repair and maintainence shops. The 5-Bank uses micro-processor technology in a four-stage charging profile to charge, improve, and float the battery so it is ready when you are. Constant current charging and regulated voltage patterns allow the battery to be recharged fully and safely without the fear of overcharging. The lights above each station indicate the stage of charge so there is no guesswork in the shop. The 5-Bank BatteryTender is used in battery rotation, when a battery is removed from service during repair or in preparing batteries for sale.