A 5V adapter is a type of power supply that provides a direct current (DC) output voltage of 5 volts. 5V adapters come in different forms, such as wall-mount or desktop-style, and have various connector types (e.g., USB, barrel jack, or proprietary connectors).
The output current rating of a 5V adapter is also important, as it determines the maximum power it can deliver. Common current ratings range from 1A to 3A or higher, depending on the power requirements of the connected device. Higher-rated adapters can power devices with higher power consumption or charge batteries faster.