A solar cell or photovoltaic cell is a device that converts light energy into electrical energy. Solar cells have many applications. They have long been used in situations where electrical power from the grid is unavailable.
Solar, Windup, Dynamo, and Faraday Powered LED Torches and Gadgets
Solar powered front light including clamp and instructions. Quick release and battery saving mechanisms. Built-in batteries charge even in cloudy weather. Steady or flashing light option. Available in silver only.
No-hassle lighting Single ultra bright LED Steady or flashing light option Built-in batteries Built-in solar panel 3 hours sunlight yields up to 7 hours use Charges even in cloudy weather Bracket for fixing to bike Quick release mechanism Daylight power save sensor (light will not work when it is too bright) Weight less than 50g Instructions provided Weathertight Ideal for commuting Available in black or silver Unit dimensions: 75mm x 45mm x 30mm approx. Due to small parts and the brightness of the LED this light is not suitable for young children.
TREBOONA.com
No-hassle lighting 
