Hottest solar backpack bag 3 solar panel backpack can charge laptop,mobile phone/mp3,mp4/ radio/digital products. Solar Hottest solar backpack bagThicker cotton is eye ring ... time streamlined side bag design on both sides of backpack can contain beverages inside.Battery: Lithium with 8, ... 5v to 20v transformation functionUnit size:52*34*15CM Solar Panel:18V,180MA,3.24WInput voltage:DC18V, 600MAOutput ...