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A model displays displays a solid fuel type cell 'Mobile aqua'... News PhotoFuel and Power Generation,Horizontal,Japan,Mobile Phone,Portable Information Device,Press Preview,Science and Technology,Smart Phone,Solid,Technology,Tokyo - Japan,Wireless TechnologyPhotographer Collection: AFP 2013 AFPA model displays displays a solid fuel type cell 'Mobile aqua' charginga battery of a smartphone at a press preview in Tokyo on June 4, 2013. The calcium hydride sheet can generat hydrogen with water while hydrogen can generate electric power with oxygen in the air. AFP PHOTO / Yoshikazu TSUNO (Photo credit should read YOSHIKAZU TSUNO/AFP/Getty Images)