With all of the emphasis on saving get-up-and-go and eco - friendliness these years , mitt - chalk technology has go steady increase use in gadget ranging fromcellphone chargersto theOLPC . If the Freeplay Foundation ’s LifeLight Project has its mode , this old school technology may soon be used to illuminate the homes of Africa ’s pitiable . According to estimates , as many as 500 million people in sub - Saharan Africa do not have memory access to electrical energy , resorting instead to kerosene lamps , battery powered light , and Ellen Price Wood fires to generate lighting . Prototypes are now being modernize for future examination in Kenya , and design have been drawn up for a baseborn unit that would be used to recharge multiple detachable light that can be distributed around the home . [ BBC News ]
https://gizmodo.com/hand-crank-cellphone-charger-247481
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