This Ozark Trail Solar Battery Maintainer is the eco-friendly way to maintain the charge of any boat, car, truck, motorcycle, ATV, snowmobile, or RV. It features a built-in panel that harnesses the power of the sun, using solar technology and converting sunlight into usable energy. This battery maintainer keeps your 12-volt batteries topped up, allowing you to manage battery drain in all seasons, and the amorphous solar panel works well even on cloudy days. It also has a blinking LED charge that indicates when charging. The solar battery charger panel mounts easily to the windshield/dash and conveniently plugs into your car's 12-volt cigarette lighter. Keep everything fully charged with the Ozark Trail Solar Battery Maintainer.