Sunpartner isn’t the first to think mobile phones should use solar power to charge themselves. A few years ago, several cell phone manufacturers tried putting solar cells on the back of phones—like the Samsung Crest and the Sharp Solar Hybrid. Turns out, though, that people weren’t inclined to put phones face down on the table—they missed alerts, and were worried about scratching the screen. And solar cells on the back of cell phones never caught on widely.
http://spectrum.ieee.org/tech-talk/green-tech/solar/selfcharging-cell-phone-screens-coming-soon
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