Featuresr high efficiencyr built with sunpower polysilicon solar panels its maximum solar conversion efficiency is up to 22 great for converting sunlight into electricity and recharging itself under sunshiner portable battery chargerr internal 4200mah lithium polymer battery can charge usb powered devices with maximum output of dc5v 1a recharged via the solar panel or using the included micro usb cable with 4 red led indicator lights to indicate battery levelsr flexible led flashlight