atula asks:How do solar powered chargers work in charging cellphones.

Solar power is based on atomic physics. Light is made up of individual particles called photons. When photons strike a material that is a conductor or semiconductor, electrons are activated. The motion of electrons generates electricity.

Solar cells have silver contacts that conduct electricity. The electricity generated in the solar cell can be transferred to another appliance, like a cellphone, just like connecting it to a battery (also with stored electricity).

The key features of a charger are sufficient sunlight to generate electricity and a way to store electricity (so it can be used anytime, not only in the sun). Often these chargers have both solar cells and a battery that is recharged by sunlight. The cellphone then drains the battery, which is charged by more light.