A new device is appearing in the New York skyline: a free mobile charging station, powered entirely by the sun. At the beginning of this summer, AT&T, the solar technology company Goal Zero and the Brooklyn-based design firm Pensa launched the Street Charge project, with 25 solar mobile charging units spread around the city. The stations work day or night, in sun or shade. During the day, monocrystalline solar panels collect the sun’s energy to recharge internal batteries. This makes possible to charge smartphones, tablets and other devices even when the sun isn't shining. The idea was born after Hurricane Sandy disaster when the city was in a blackout and AT&T powered New Yorkers with generators and pop-up cellular service. This tool demonstrates how we increasingly dependent on technology, not only in case of crisis, but also for everyday emergencies.