The BLSOLAR5 is a 5-Watt Ultra Low Profile Thin Film Solar Battery Charger and Maintainer. The BLSOLAR5 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 BLSOLAR5 is completely waterproof and weatherproof, and can be used outdoors. Provides up to 410mA (0.41A) charging current, and protects against accidental reverse battery drain. Its Thin Film Technology allows for optimal performance in low-light, cloudy and overcast conditions.