Energy harvesting refers to the process of capturing and converting ambient energy sources, such as solar, wind, or thermal energy, into electrical power. This technology aims to provide an alternative to traditional power sources, particularly in low-energy applications where it is impractical to replace batteries or run power cables. Common examples include solar panels that convert sunlight into electricity, piezoelectric devices that generate power from mechanical stress, and thermoelectric generators that produce electricity from temperature differences. These energy-harvesting systems are often used in remote or hard-to-reach locations, like sensors in industrial equipment, wearables, and "Internet of Things" (IoT) devices, to provide a sustainable power supply. As issues like energy sustainability and resource conservation become increasingly critical, energy harvesting technologies offer promising avenues for creating more energy-efficient and environmentally friendly solutions.