It is best for maintaining 12 Volt batteries found on your motorcycle, ATV, boat, RV, tractor, lawn mower or snowmobile. Suitable for maintaining all types of lead-acid batteries, such as, Wet, Gel, MF and AGM. The Solar Battery Charger and Maintainer is completely weatherproof, and can be used outdoors. Provides up to 180 milliampere (.18 Ampere) charging current, and protects against accidental reverse battery drain. Its thin film technology allows for optimal performance in low-light, cloudy and overcast conditions.