The Umeox Apollo Smartphone is just a tad smarter than most. This Android based phone has an efficient solar panel on the back that can charge the phone in just 2.5 hours of direct sunlight. Not sure how much damage direct sunlight will do to a phone over time, but I am sure hope they thought of that. I wonder if it gets any charge from normal office lighting situations.
Still in the manufacturing stages, but very cool nonetheless.