A power converter is an electrical device that changes the form of electrical energy from one type to another. For example, it can convert alternating current (AC) to direct current (DC), or change the voltage level of electricity to make it suitable for different applications. Power converters are essential in various devices, including chargers, power supplies, and renewable energy systems. These converters come in different types, such as inverters, which convert DC to AC, and transformers, which adjust voltage levels. They play a crucial role in ensuring that electronic devices receive the correct type and amount of power needed for optimal performance.