To ensure that the USB Power Plug is compatible with all devices, multiple aspects need to be considered, as different devices may have different charging requirements, interface standards, and power requirements.

1.Understand USB standards and interfaces
First, you need to be familiar with various USB standards (such as USB 2.0, USB 3.0, USB-C, etc.) and their interface characteristics. USB interfaces of different standards may differ in physical shape, data transfer rate, and power transmission capacity. For example, the USB-C interface is a newer standard with a smaller size, higher data transfer rate, stronger power transmission capacity, and supports positive and negative insertion.

2. Choose a multi-interface design
In order to be compatible with different types of devices, the USB Power Plug can adopt a multi-interface design. For example, a plug equipped with both USB-A and USB-C interfaces can meet the charging needs of most devices. In addition, you can also consider adding other types of interfaces, such as Micro-USB or Lightning (via an adapter) to further expand the compatibility range.

3. Support a wide range of voltages and currents
Different devices have different requirements for charging voltage and current. To ensure compatibility, the USB Power Plug should support a wide range of voltages and currents. For example, it can be designed to support multiple voltage outputs such as 5V, 9V, 12V, and has intelligent recognition functions to automatically adjust the output voltage and current according to the connected device.

4. Comply with international standards and safety specifications
When designing and producing USB Power Plug, international standards and safety specifications such as UL, CE, FCC, etc. must be followed. These standards specify the requirements for the product's electrical performance, safety performance, electromagnetic compatibility, etc., to ensure that the product can be used safely and reliably in different countries and regions.

5. Provide adapters and adapters
For some special interfaces or old devices, USB Power Plug may not be directly compatible. In this case, corresponding adapters and adapters can be provided as accessories. Users can choose the appropriate adapter or adapter as needed to connect the USB Power Plug to incompatible devices.