This 12 volt solar powered battery maintainer is used for car and leisure batteries. This 2.4 watt charger does not need sunlight to work, it can even be used on a cloudy overcast day to charge your battery. It can charge your battery in two ways, either using the 12V DC cigarette lighter power plug, or using the battery clips provided. Complete with suction cups for windscreen mounting and can be left connected overnight. 1.38 metre cable length and is reverse polarity protected. Size H52, W26.1, D3.3cm. Weight 1.17kg.