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Electronic company LG has unveiled a solar-powered e-book reader, which can work for a day on a five-hour charge.
The device is a prototype and it is unclear whether it will ever go on sale. According to the Guardian, the panel sits on the inside cover of the reader, weighing 10 grams and a millimetre thick.
Ki Yong Kim, head of the Solar Cell Office at LG Display, said: "E-books are attracting a lot of attention because they offer the advantage of storing thousands of books' worth of contents in an easy-to-carry device.
"The idea of e-book combined with solar cell will offer users the added benefit of longer usage. We will continue to provide users with enhanced convenience and value to solidify our lead in next-generation, environmentally friendly products."