Not very many I don’t think… One good one is all it would take… even a smaller one: There is a gadget that has two or three small solar panels and it can charge a cell phone, and I don’t think that an iPod requires much more energy… I plug mine into my laptop and that’s why I can’t wait to get my own Bio-mechanical energy harvester so I can charge my laptop with it, just by walking (go canadian military!)
Wow, I am like the best researcher ever now: Just check out the second link and you’ll be amazed!
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