The diagram show how an LED (light emitting diode) flashlight works. Summerise the information by selecting and reporting the main features, and make comparisons where relevant.

The diagram illustrates the different parts of an LED and how they function together. The overall structure of a light emitting diode contains various components, including a metal spring, a battery, metal contacts, and a plastic case surrounding the equipment. Additionally, there is also a separate slide switch on the side having a broken circuit. […]