Perfect for keeping your boat, car, tractor, motorcycle or any 12v house battery topped up. It includes battery clips and a cigarette lighter adaptor for simple connection, and will mount easily on windshield or dash (suction cups provided). The built in blocking diode prevents any drain on your battery at night. Provides up to 1.5W charging power, which is plenty to prevent idle discharge of your expensive vehicle battery, works even on cloudy days. Features: Trickle charge to compensate for natural battery discharge Cigarette lighter / battery clip option Use with any rechargeable 12V battery Dash/ Windshield mount (suction cups supplied) Power Rating: 1.5W (+-5%) DC Voltage : 1.5V DC Voltage tolerance : 5.0% Width : 125.0mm Height : 335.0mm Depth : 20.0mm Cable length : 2.5m Weight : 470.0g Open Circuit Voltage : 21.0V Short Circuit Current : 107.0A Voltage at Power Max : 17.5V Current at Power Max : 85.7A Power Connector : Alligator Clips