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February 1, 2015

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Smartphone cases with solar photovoltaic cells by EnerPlex are displayed during "CES Unveiled," a media preview event to the annual Consumer Electronics Show (CES), in Las Vegas, Jan. 5, 2014. The cases retail for $89.99-$99.99 depending on the model.

Steve Marcus

Smartphone cases with solar photovoltaic cells by EnerPlex are displayed during "CES Unveiled," a media preview event to the annual Consumer Electronics Show (CES), in Las Vegas, Jan. 5, 2014. The cases retail for $89.99-$99.99 depending on the model.