Shenzhen ShiMing New Energy Development has developed Solar stars brand digital Universal Solar back-up battery charger series,outdoor universal solar back-up battery charger series,universal solar back-up battery charger series(support for mobile phones,digital cameras,notebook computers), solar mountaineering bag charger,portable solar power system and etc.all of our products have been certified by CE,FCC,ROHS. Our company has spent three years developing the portable solar power system , among them the largest solar power is 75W,the maximum battery capacity of high-energy lithium-polymer is 3.7V, 54000MAH. It has 3,5,6,9,12,16,19,22,24V-9 different kinds of voltage output, the maximum output current is 4A,from 16V to24V, the circuit conversion rate is higher than 92%,with 32 different connectors.Please contact us at solarstars625#gmail.com.Welcome to join us.