A USB charger is a device that supplies electrical power to charge various electronic gadgets, such as smartphones, tablets, and laptops. It typically connects to a power source, like a wall outlet or a computer, using a USB cable. The charger converts the electrical current to a suitable voltage for the device being charged. USB chargers come in different types, including USB-A, USB-B, and USB-C, each with unique shapes and capabilities. Many modern devices use USB-C due to its fast charging and data transfer capabilities. These chargers are widely used because they are versatile and compatible with many devices.