According to international plug adaptor suppliers, an adapter is an interface converter, which can be an independent hardware interface device that allows a hardware or electronic interface to be connected to other hardware or electronic interfaces, or an information interface. For example: power adapters, tripod base adapter parts, USB and serial port adapters, etc.
International plug adaptor suppliers share the role of adapters:
1. To convert data serial transmission and parallel transmission.
2. Cache the data.
3. The device driver that manages the adapter is installed in the computer's operating system.
4. Realize the Ethernet protocol.

Is the adapter a charger? International plug adaptor suppliers say not necessarily.
There are many kinds of adapters, among which the power adapter is generally a charger, which is a key component for converting 220V power into the voltage required for charging mobile phones and computers. It has internal components such as transformers and rectifier circuits. When buying a mobile phone, you will often see an adapter in the package, which refers to the charging head.
Should the adapter be unplugged? International plug adaptor suppliers believe that if it is a power supply type, it is recommended to unplug it after charging, but now a good quality power adapter has a built-in protection circuit, even if it is not unplugged, it will not be affected. When choosing an adapter, it is best to choose the original or compatible matching according to the device model, which has better performance and safety in use.