A typical USB port, such as those commonly found on computers and chargers, provides a voltage rating of 5 volts (V). This voltage is used to power and charge various devices like smartphones, tablets, and other USB-powered gadgets. It's important to note that while the voltage is standardized at 5V, the amount of current a USB port can provide can vary, with USB 2.0 typically providing up to 500 milliamperes (mA) and USB 3.0 and later versions providing higher current capacities for faster charging. Always ensure that you use compatible devices and cables to avoid potential damage or safety risks.