What is the standard voltage provided by USB connections?

The standard voltage provided by USB connections is 5V. This specification is consistent across most USB versions, including USB 1.0, USB 2.0, and USB 3.0. The 5V supply allows USB to effectively power various devices, such as keyboards, mice, and mobile phones, ensuring compatibility across a wide range of devices. This standard voltage makes it convenient for manufacturers to design peripherals and accessories that can be powered through USB ports.

While there are variations in voltage supplied by other connection types or charging protocols, the conventional USB specification has standardized on 5V to foster universal compatibility.