Whether preventing a car battery from going flat whilst parked at an airport or maintaining and extending the life of a caravan battery in winter storage, the Solar Technology Portable Solar Power System has the power to ensure your battery will work when you need it most. With it's supplied cables, connecting to a battery couldn't be simpler: just plug the solar panel in to your vehicle's cigarette socket or connect directly to the battery's positive and negative terminals, and it’s done! The charging indicator LED on the front of the panel only lights up when the panel is connected to a battery and delivering current, so it’s easy to check that the system is working. The Portable Solar Power System is tough, encased in a housing of hard wearing ABS material. It is fully weather resistant and can be used outdoors in all weather conditions as well as indoors. Pack Contents: