Given that people tend to carry multiple mobile devices, two way charging, the company says, will let people easily share power between devices rather than worrying about making sure they are all fully charged. For example, say a pad computer’s battery is almost out of power, but the user wants to catch the ending of a movie before shutting it off; he might decide to pull a little power from a mobile phone. Alternatively, a laptop or pad computer could act as a backup power source for a smartphone.
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Tekla S. Perry is a senior editor at IEEE Spectrum. Based in Palo Alto, Calif., she's been covering the people, companies, and technology that make Silicon Valley a special place for more than 30 years. An IEEE member, she holds a bachelor's degree in journalism from Michigan State University.