Features：Supplement power to all your 12V car batteries and creates 4.5 watts of energy. Mono-crystalline silicon solar panel guarantees its high efficiency. Universal installation in vehicles of 12V， including car， motorcycle， boat， ATV， tractor， boat，etc， so as to extending their batteries’ lifetime. Also charges other 12V rechargeable batteries in emergency， especially for your working， traveling or camping in the wild. Constructed with a built-in blocking diode in its cigarette lighter and clips to prevent reverse discharging. Charges in all daylight conditions， even on cloudy days. Durable， portable and environmental friendly. Specifications:Color: Black Material: Mono-crystalline silicon Production dimensions: 32.3x 12.3cm Power: 4.5W No-load voltage: DC 18-23V Output current: 250mA(ideal condition) Fitments: all car or motorcycle batteries of 12V Package contents:1 x Solar panel car battery charger1 x Cigarette lighter cable 1 x Battery charging clips cable1 x User Manual 2 x Suckers