The devices we rely on each day are constantly improving, with new versions of phones, tablets and wearbles, but their battery life never quite seems to get a boost. It’s something 25-year-old Hahna Alexander is tackling from a scrappy office building in Pittsburgh.
Alexander is co-founder and CEO of SolePower, a start-up that makes power-generating shoe insoles, called EnSoles, that charge portable electronics, such as smartphones and GPS, by harvesting the energy taken with each step and storing it in an easily accessible battery. The company claims that for every one hour of walking — about 6,750 steps — enough power is generated for 30 minutes of talk time on a smartphone.
