Energy harvesting is the process of capturing and storing energy from external sources, such as sunlight, heat, or motion. This energy can then be converted into usable electrical power. Common methods include using solar panels to collect sunlight or piezoelectric materials that generate electricity from vibrations or pressure. This technology is increasingly important for powering small devices, like sensors and wearables, without relying on traditional batteries. By harnessing energy from the environment, energy harvesting can lead to more sustainable and efficient energy solutions, reducing the need for frequent battery replacements and minimizing waste.