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A worker of Wysips shines a torch on the screen of a prototype of a... Photo d'actualitéBarcelone - Espagne,Communication sans fil,Congrès mondial de la téléphonie mobile,Dispositif portable,Espagne,Horizontal,Innovation,Métier,Panneau solaire,Science et technologie,Technologie,Téléphone mobile intelligent,Énergie solairePhotographer Collection: AFP 2013 AFPA worker of Wysips shines a torch on the screen of a prototype of a smartphone equipped with a photovoltaic film at the 2013 Mobile World Congress in Barcelona on February 26, 2013. A transparent film that costs just one euro (1.30 USD) to make could bring an end to the anguish of mobile phone users facing the dreaded dead-battery message. Wysips, a startup based in Aix-en-Provence, southern France, has developed a photovoltaic film which can be built seamlessly into a mobile phone screen and deliver the joy of life to a flat battery. AFP PHOTO / JOSEP LAGO (Photo credit should read JOSEP LAGO/AFP/Getty Images)