Smartphones and tablets are everywhere, and it's no secret that people are tied to their devices. App markets are filled with all types of software that, if used properly, can help manage every aspect of a person's life and connect them to databases filled with humanity's accrued knowledge. The polling professionals at Gartner found that over 1.2 billion such devices were purchased in 2013 alone. This boom gives innovators new markets to explore. XD Design is doing just that with their line of solar-powered chargers.