USB charging and socket charging are not exactly the same. While they can all ultimately power electronic devices, there are differences in how they are powered.
Socket charging is to transmit electrical energy to the device through the socket and wire, while USB charging is to connect with the power supply through the USB interface to transmit electrical energy to the device. In addition, USB charging is usually able to provide less power, so the charging speed may be slower. In general, the two charging methods have advantages and disadvantages, and users need to choose according to the actual situation.
No matter what kind of charge, the output is 5 volts, but the charging power is not the same.
usb charging and socket charging are 5V voltage, but the power of charging is different
usb charging and socket charging is not the same, usb charging 5v socket charging is 220v