Earth and sun and moon
Well, not quite. But it is another personal charging option to add to the solar and hand-crank mix (thanks to Guy Yeomans for pointing this in my direction over lunch last week).
The HYmini is a cool compact wind-powered charger with an internal lithium ion battery (there’s also an optional solar panel and hand-crank attachment). They’re still a little pricey, coming in at around the $50 mark, but I can imagine as they get cheaper seeing them attached to bikes – the perfect power solution for Bodafones and other bicycle-centric phone service providers in developing countries (photos, below, from kiwanja’s Mobile Gallery).
Motion chargers would be the final piece of the jigsaw, but are still a little way off. Trevor Baylis prototyped a pair of “electric shoes” back in 2001, walking across the Namib desert to prove that you could charge a small battery – enough to power a radio or mobile phone – through the action of walking. Nothing may have come of that, but he clearly got other people thinking. Expect announcements later this year.