Nowadays, the flashlight is mostly LED flashlight, and its main part is composed of the following parts:
1) Power supply (dry battery, storage battery, lithium battery, etc.);
2) Circuit board (LED drive circuit);
3) LED lamp holder;
4) Light collector (reflector mask);
5) Gear switch;
6) Flashlight shell (battery cover, barrel body, barrel head with a light mirror);
7) Other attachments.
The main categories of LED flashlight are:
1) The light intensity can be adjusted, and the light can be controlled into strong light, weak light and flicker through the same button;
2) Various forms of power supply, including No. 5 AA battery, No. 7 AAA battery, rechargeable battery, manual charging;
3) A variety of grades of light intensity, it is achieved by voltage, voltage range is generally 0.8 volts - 3.7 volts;
4) There are waterproof type and non-waterproof type;
5) A variety of modeling, hand and hand, can also be divided into right Angle type, straight cylinder type, head activity type;
6) According to the use, can be divided into security, mining flashlight, ordinary flashlight;
7) Including other ancillary functions, such as charging mobile phones, carrying knives, imitation pen type;
8) According to the effect of heat dissipation can be divided into aluminum alloy shell, stainless steel shell, iron shell, plastic shell, etc. Of course, good heat dissipation, light decay will be much smaller.
