#3 Solar Backpack
Another handy, easy-to-wear solar charger, this one in the form of a backpack covered in solar cells. The larger size means more power, enough to handle a laptop at the right charge, but primarily intended to charge cell phones or MP3 players. The most notable example to date is the Offgrid Solar Backpack from Voltaic Systems. A full battery (built-in) provides up to 19 hours of talk time or 48 hours of music playback. The pocket decked with solar cells is removable and can be attached elsewhere while it powers up. Integrated laptop sleeve, phone pouch and a bunch of other pockets keep the pack as functional as any old Jansport. Retails for $249.