Lead wire is commonly used in electrical and electronic applications due to its excellent conductivity and malleability. It serves as a connector in circuits, linking components such as resistors, capacitors, and integrated circuits on printed circuit boards. Its flexibility allows for easy routing and soldering, making it ideal for prototyping and manufacturing. In sensors and measurement devices, lead wires transmit signals with minimal loss, ensuring accurate data collection. They are also used in battery assemblies to establish reliable electrical connections between cells. In high-temperature or harsh environments, lead wires may be insulated with materials like silicone or Teflon to maintain performance and prevent short circuits.