The article "Advances in Energy Harvesting Technologies for Wearable Devices" by Minki Kang and Woon-Hong Yeo reviews recent progress and challenges in energy harvesting technologies for wearable electronics. Wearable electronics, including smartwatches, fitness trackers, and medical sensors, are revolutionizing healthcare, fitness, communication, and entertainment. However, traditional batteries limit their wearability and comfort. Energy harvesting technologies, which convert ambient energy into electrical power, offer a promising solution. The review highlights the potential and technological challenges in energy harvesting, including power management and energy storage devices. Key energy harvesting methods discussed include photovoltaic (PV) cells, biofuel cells (BFCs), triboelectric generators (TENGs), piezoelectric generators (PEGs), and thermoelectric generators (TEGs). PV cells convert light into electricity, BFCs use biochemical reactions from body fluids, TENGs capture mechanical energy from bodily movements, PEGs generate power from mechanical stress, and TEGs exploit temperature differences to produce electricity. The article also addresses the integration of these energy harvesters into wearable devices, emphasizing the need for efficient power management and energy storage. Power management units (PMUs) are crucial for optimizing harvested energy and ensuring stable power supply. The review discusses various PMU designs, including maximum power point tracking (MPPT) algorithms and voltage regulation circuits. Despite the advancements, challenges remain, such as insufficient output power, limited applicability in diverse environments, and technical difficulties in integrating energy harvesting technologies. The authors propose next-generation wearable soft electronics that enhance quality of life and broader adoption in daily life. They conclude by discussing future perspectives and the need for multidisciplinary approaches to overcome these challenges.The article "Advances in Energy Harvesting Technologies for Wearable Devices" by Minki Kang and Woon-Hong Yeo reviews recent progress and challenges in energy harvesting technologies for wearable electronics. Wearable electronics, including smartwatches, fitness trackers, and medical sensors, are revolutionizing healthcare, fitness, communication, and entertainment. However, traditional batteries limit their wearability and comfort. Energy harvesting technologies, which convert ambient energy into electrical power, offer a promising solution. The review highlights the potential and technological challenges in energy harvesting, including power management and energy storage devices. Key energy harvesting methods discussed include photovoltaic (PV) cells, biofuel cells (BFCs), triboelectric generators (TENGs), piezoelectric generators (PEGs), and thermoelectric generators (TEGs). PV cells convert light into electricity, BFCs use biochemical reactions from body fluids, TENGs capture mechanical energy from bodily movements, PEGs generate power from mechanical stress, and TEGs exploit temperature differences to produce electricity. The article also addresses the integration of these energy harvesters into wearable devices, emphasizing the need for efficient power management and energy storage. Power management units (PMUs) are crucial for optimizing harvested energy and ensuring stable power supply. The review discusses various PMU designs, including maximum power point tracking (MPPT) algorithms and voltage regulation circuits. Despite the advancements, challenges remain, such as insufficient output power, limited applicability in diverse environments, and technical difficulties in integrating energy harvesting technologies. The authors propose next-generation wearable soft electronics that enhance quality of life and broader adoption in daily life. They conclude by discussing future perspectives and the need for multidisciplinary approaches to overcome these challenges.