Versatile testing capability: The RD LD25 USB Interface Electronic Load Tester lets you efficiently test batteries and power supplies with adjustable current up to 4A and a maximum power of 25W. This enables realistic load conditions and comprehensive performance evaluation for a wide range of cells and supplies. Realtime LED display: An intuitive LED display provides realtime monitoring of voltage and current, allowing you to observe discharge behavior as it happens and easily track performance during tests. Efficient cooling system: An adjustable fan helps maintain operating temperatures during extended test sessions, reducing thermal stress and supporting device longevity and reliability. Compact and portable design: Lightweight and easy to carry, the RD LD25 is well suited for both professional service environments and use, making it convenient for technicians and hobbyists to test onsite or at the bench. Use scenarios Battery and power supply characterization: Use the RD LD25 to discharge and evaluate rechargeable battery packs, power banks, and bench power supplies under controlled loads to verify performance, capacity, and stability. electronics maintenance and prototyping: Employ the tester during work or prototyping to simulate realworld load conditions on devices, ensuring components respond correctly under expected currents. field service and onboarding: Take the unit to job sites or classrooms for handson testing and demonstrations, providing reliable load testing without requiring bulky equipment.