The SolarAid, including the solar charger and an extra pair of batteries, sells for less than $100, and is built to last at least two to three years. But, as low cost as that is, Godisa wants to do even better: they want to make the design free to everyone - essentially, to go open source - if the Botswana government will let them.
Via Jamais Cascio at WorldChanging. And in case you missed it last week, see the Malaria watch and Moneymaker irrigation pump.
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