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The disassembly of Huawei's 40W super fast charging head can be seen. It can be said that the inside is full, and the circuit board is full of various components.

The basic composition of mobile phone charger: filter capacitor, which is very important and occupies a larger space, is composed of various inductors, resistors, high-frequency transformers, rectifier diodes, switch tubes, various control chips, and various output control and protection circuits.