Low-power electronics is a field of research and engineering concerned with the design, analysis, and optimization of electronic circuits and systems to minimize energy consumption during operation and standby modes. It investigates novel architectures, circuit techniques, and device technologies aimed at reducing power dissipation across various levels of abstraction. Key characteristics include prioritizing energy efficiency, extending battery life, and enabling operation from limited energy sources, which is critical for the development of portable devices, ubiquitous computing, and sustainable electronic systems.