... ,solar energy backpack. 1)power supply for laptop,mobile phone,MP3/MP4 2)Solar Panel:18V,180MA,3.24W Solar bag ... with four solar panels,can charge mobile phone/mp3,mp4/radio/digital camera/ipod. Solar Panel:18V,180MA,3 ... ,12-16.8VCapacity:3.7V 8800MAH(32.5WH) Second lined MP3 / sunglasses pouch inside, Optional clip in padded laptop sleeves, Bladder pouch ...