laptop solar backpack in high quality 1.solar panel 5.4Watt, power supply ... , MP3/4,digital camera, electronic dictionary etc.... 4 High quality solar panel should support more than 20 year working. ... charge for them directly. 6 The backup battery is movable, you can take it off from the bag, reduce ... :nylon,polyester, canvas,leather etc.(provide your choice) High Quality laptop solar backpack in 1680D