Magic rub?
By Cheng Yingqi | China Daily | Updated: 2014-04-02 08:38
It might sound as unlikely as the story of Aladdin's lamp, but scientists are eager to capture the energy generated by friction, Cheng Yingqi reports.
Does your cellphone battery die when you are expecting an important call? Or when you need your handset navigation most?
Imagine if you could recharge by giving a device a good rub, or shake, or even speaking into it.
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