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ÇൺϣÄá¶û·­Ò빫˾£¨www.joshualeeproperties.com£©2015Äê11ÔÂ29ÈÕÁ˽⵽£ºThe hassle of having to charge your smartphone for hours a day could become a thing of the past.

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British scientists have created a material that replaces the screen glass for phones, tablets and smartwatches, but uses no power ¨C meaning they could be charged weekly.

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The discovery is significant because more than 90 per cent of a device¡¯s battery power illuminates the screen.

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Technology firms have focused on improving battery life. But the British experts say tackling the main drain on a gadget¡¯s power may give better results.

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Oxford University engineer Dr Peiman Hosseini, who invented the material, told the Sunday Telegraph: ¡®You have to charge smartwatches every night. But if you had smart glass, you could recharge it just once a week.¡¯

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The innovation uses electrical pulses to create displays that require no power and can be viewed even in direct sunlight. Dr Hosseini¡¯s company, Bodle Technologies, hopes to have a prototype in a year.

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¡®This is the right moment to be an academic at Oxford,¡¯ Dr Hosseini said.Battery life is seen as a major stumbling block for modern computing and technology.

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While the power of technology and lifestyle gadgets has improved exponentially in recent years, batteries have not kept pace.

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The success of smart watches, including Apple¡¯s version, is thought to hinge on solving this problem - because few users are willing to charge a watch every day.

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Gadget firms are also desperate to solve the problem.

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Apple, for example, is investigating using fuel cells to power its phones and laptops, and this year was granted a patent for a system it claimed could power its devices for weeks.

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In 2012 US energy secretary Steven Chu called for a big push to improve batteries, challenging scientists to produce a battery with five times the capacity within five years.

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Aside from mobile gadgets, improving battery technology is seen as being key to the success of electric cars, which currently have a limited mileage before they must stop to be recharged.

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