Sunnytech 1pc 3.5w 6v 583ma Mini Solar Panel Module Solar System Solar Epoxy Cell Charger DIY B033 PORTABLE---- Mini solar panel, compact & stylish size, easy to be held, can be easily taken to outdoor activity. SUFFICIENT ENERGY---- High conversion rate, high efficiency output, excellent weak light effect. HIGH QUALITY---- High quality epoxy resin, unique technology to make the components beautiful and strong, anti-wind and snow, increase the service life of solar panels. EDUCATION---- Solar panels are devices that absorb sunlight and convert solar radiation directly or indirectly into electricity through photoelectric or photochemical effects, it's perfect devices for science project. CONNECT SOLAR PANELS IN PARALLEL OR IN SERIES---- When the voltage of your solar panel doesnt satisfy your storage battery, you can take two or more same solar panels together in series. Such as, two 5.5v solar panel connect together in series, so its voltage is 11V. When the voltage of solar panel satisfies your storage battery. In order to speed up the rate of charge, you can take two or more same solar panel together parallel connection.