With a solar backpack you can charge all your handheld devices while you are on the go. I found this to be quite interesting. The suns energy is stored into a small battery inside the backpack which in turn can charge your phone in a couple of hours to full charge.
There things are cool! If you are on the go and are looking for a way to keep your ipod, ipad, laptop, or phone charged then check these things out here!
