ECO-WORTHY 10W Portable Solar Trickle Charger perfect trickle charger/maintainer for 12V batteries of cars, motorcycles, boats, snowmobiles, tractors, etc. Comes with the cigarette lighter adapter, 1 pair of battery clips, and 4 pieces of PVC suckers. Unique design-high quality clips to prevent short circuits. Charging 12V battery in an emergency, suitable for vehicles in outdoor work, travel, or camping training, and the vehicles are put for a long time. Easy to install and completely maintenance-free. Environmental protection and energy saving, built-in blocking diode to prevent reverse discharge, not only maintains the battery lifetime but also extends its usage life, keeping the battery from draining dead. Please note that the protective plastic film on the panel surface is supposed to peel off. The cigarette plug option only works if it has constant power when the key is out of the ignition. When you start the car, please remove the solar panel from the car battery.