Easy to use charger that is packed with features. Our advanced 15A Automatic Portable Battery Charger harnesses high frequency technology and automatically delivers three-stage charging for your Gel, AGM or flooded start or deep-cycle battery. An easy to read digital LCD screen displays charging and battery status with intuitive icons, and features a patented Alternator Check to indicate if the alternator is maintaining battery level. The Engine Start Timer gets you back on the water (or the road) quickly with a 40amp boost. Its simple to use and easy to store with cable wrap and clamp storage built in. Key Features 15 amp Fully Automatic Charger/ Maintainer Compatible with AGM, GEL and WET 12 volt batteries Fully Automatic high frequency chargingto deliver 3 charging stages 40 amp Engine Start feature allows re-start most vehicles in up to 90 seconds. Maintenance keeps battery at optimal capacity during off-season Patented alternator check and battery voltage check confirms alternator is properly maintaining battery Battery reconditioning feature helps extend battery lifeConnects using sping loaded battery clamps Reverse polarity protection and temperature compensation LCD Screen with easy to read icons AC Low-voltage compensation ensures maximum performance when used with extension cordsDimensions: 12 1/8"W x 5 3/8"H x 93/8"DApprovals: FCC Part 15, Class B