Many of us face problem with the battery life of our mobile .maybe this new invention may bring about a change to this problem .there are many approaches to improve the battery life like huge batteries or can improve the efficiency of chips, wireless modules, and screens and so on .Another approach is to let recharge the battery on the go without stopping to plug in the  device. An Indian origin researcher Smitha Rao, working with her Taiwanese professor at the University of Arlington, Texas, may have found a solution to batteries dying out in cell phones  .they developed small turbines ( can stick 10 of them in a grain of rice ) The little windmills are made from a durable nickel alloy and have been shown not to break under strong winds.. By waving the cell phone in air or holding it up to an open window on a windy day, the array would generate enough electricity to recharge a cell phone's battery.
 

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