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updated 6/19/2013 12:57:41 AM ET 2013-06-19T04:57:41

These days, many companies have addressed the perpetually dying cell phone problem with battery packs. With USB output, these portable batteries -- powered via wall outlets, the sun's rays or a hand crank -- can charge up most mobile devices. Yet such a solution has been lacking for the laptop, another portable device that always [...]

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