Waka Waka Solar Powered Lamp and Charger - Available in shades of black and yellow, the Waka Waka Solar Powered Lamp and Charger has been touted to be “the most efficient solar lamp in the whole world”, where a single day of sunlight is said to gather enough juice to deliver up to 40 hours of lamp light, now how about that? It can also juice up your gadgets on the go. | Coolest Gadgets
"a collapsible, portable lamp that charges during the day using solar power to provide energy to light up at night. Designed by Swedish designer Jesper Jonsson, the lamp is turned on when you unfold and expand the shade through a twisting motion."