RD LD25 USB Interface Electronic Load Tester Versatile testing capability: The RD LD25 USB Interface Electronic Load Tester allows efficient testing of batteries and power supplies with an adjustable current up to 4 A and a maximum power of 25 W, enabling thorough performance evaluation. Realtime LED display: Equipped with a clear LED display, the RD LD25 provides realtime monitoring of voltage and current levels, making it easy to track discharge rates during testing sessions. Efficient cooling system: Featuring an adjustable fan, the RD LD25 USB Interface Electronic Load Tester maintains operating temperatures, enhancing longevity and reliability during extended use. Compact and portable design: Designed for convenience, the lightweight RD LD25 is portable, making it suitable for both professional and use—ideal for technicians and hobbyists alike. Use scenarios: In a workshop or lab, discharge and evaluate batteries and power supplies by applying controlled loads up to 4 A and 25 W. On the bench or in the field, verify the performance of DC power supplies, adapters, and chargers with a controlled load. For hobbyists, students, and technicians, perform battery pack capacity tests and discharge experiments on Liion and other rechargeable cells.