What are the parts of a LED flashlight?
First: LEDSecond: BatteriesThird: circuitFourth: barrel, reflector cup
The shell, including the shell, reflector bowl, switch, etc.!
2. circuit: boost circuit, according to the battery used to boost the circuit to a certain value, to meet the requirements of light-emitting diodes, generally about 3V. If it is a lithium battery, there is a step-down circuit, as well as discharge protection circuit.