Features: The Battery Capacity Tester features LCD digital display that provides clear readings of voltages, current, time, capacity, and energy, ensuring precise testing for various battery types. This powerful battery tester supports multiple battery measurements, including capacity and internal resistance tests, with separate voltages and current channel enhances accuracy. For electronic repair technicians, enthusiasts, and users needing to assess battery performances, this device offers comprehensive testing capabilities. Perfectly for battery diagnostics and electronic equipment maintenance, the tester can be used in workshops,or home for reliable battery checks. Connection the tester to a computer through USB TTL cable for advanced functions like graphicaled calibration and firmware upgrades Specifications: Model: Battery Tester Electronic Battery Capacity Test Tool Size：about 15x12x12cm/5.9x4.72x4.72in Component：Metal Power：DC19-20V 3.5V or more Voltages setting ranging: 0.00-30.00V steppers in charging 0.01V voltages up to 18V Current setting ranging: 0.10-20.00A steppers 0.01A when discharging; 0.01-5.00A steppers 0.01A when charging Voltages accuracy: 0-4.5V 0.003V; 4.5-30V 0.01V Current Accuracy: 0.10-20.00A 0.01A Computer Connection: Specified USB-TTL Package Includes: 1Set Battery Tester note: There might be a bit color distortions due to different computer resolution There might be size errors due to different computer resolution