Features: Multifunctional 22V Battery Capacity Tester with 150W discharge power, precise ±1% measurement accuracy, and versatile charging/discharging (1.25V 20V/0.5A & 1V 30V/0.5A 20A) for efficient battery analysis and maintenance. Equipped with active cooling, smart thermal control (40°C/3A), and multi protections (over voltages, current, load, temperature, reverse polarity) to ensures safe operate and extended device service life. Designed for electronics enthusiasts, repair technicians, and battery manufacturers requiring capacity testing, cell balancing, cycle aging analysis. Optimized for lab diagnostics, workshop maintenance, or home projects to evaluate power banks, batteries, solar storage systems, and industrial equipment with USB RS232 connectivity. Engineered with robust sheet metal construction, this tester delivers lab grade precisions for capacity measurement, recharge balancing, and performances optimization across diverse battery applications. Specifications: Component: Sheet Metal Host size: about. 198x96x86mm/7.8x3.85x3.38in Package Includes: 1pc Battery Tester note: Please allow 1-2cm errors due to manual measurement. Due to difference between different monitors, the picture may not reflect the item actual color. Do NOT include power and cable.