Solar backpacks charge electronics from iPods to cellphones. From this specific company, Voltaic Systems, a solar backpack can produce 4 watts of electricity from being exposed to sunlight for one hour. People wearing solar backpacks can also charge their laptops and GPS devices.
Solar backpacks provide a “quality pack with an integrated solar charging solution for your high-tech toys”. They can charge laptops, cell phones, iPhones, iPods, and other handheld electronics. Solar backpacks use solar panels on the outside which collect energy from the sun—so obviously you have to wear it in moderately sunny areas in order to gather a charge. They are perfect for people who love the outdoors, but still prefer electronics. Many companies have started to make solar backpacks, and some even make solar laptop cases!
Earthtech seems to be one of the more popular ones: http://www.earthtechproducts.com/solar-backpacks.html
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