ECO 4.0 is a smart, 5-step fully automatic switch mode battery and maintainer, designed for charging a variety of lead acid rechargeable batteries, widely used in motorcycles, cars, boats and ATVs, Jet Skis and Snowmobiles. The batteries may be of various types i.e. WET/Flooded, GEL, AGM batteries capacity from 12V/4Ah to 12V/120 Ah. The ECO 4.0 recovers slightly sulfated batteries and rescues drained batteries as low as 3.0V. it provides trickle charge and maintenance charging which increase battery life and gives superb performance.