Wall chargers are devices used to supply electrical power to various electronic gadgets, such as smartphones, tablets, and laptops. They plug directly into a wall outlet and convert the electrical energy from the outlet into a form that can be used to charge batteries. Most wall chargers come with a USB port, allowing users to connect their devices using a compatible charging cable. These chargers vary in power output, typically measured in watts, which affects how quickly a device can charge. Some wall chargers are designed for specific devices, while others are universal and can charge multiple types of gadgets. Popular brands include Apple, Samsung, and Anker.