Power supply: DC 19V-20V, 3.5A or aboveVoltage setting range: 0.00-30.00 stepper in charging mode (0.01V, the maximum voltage is (18V)New battery capacity/internal resistance test added to battery testCurrent setting range: "During discharge, 0.10-20.00A, stepper 0.01A automatic adjustment of power over limit (current)When charging, 0.10-5.00A, stepper 0.01A (maximum current depends on power supply current)"Manual mode: "-CC (constant current discharge): the discharge current remains constant, recommended for battery capacity testing-CP (Constant Power Discharge): The discharge power remains constant at all times and is recommended for simulating constant power devices-CV (constant voltage charging): The charging voltage remains constant at all times, recommended for battery and lead-acid battery testing"Automatic mode: ""This tester supports automatic cycle testing of charge and discharge and is recommended for capacity testing""Voltage accuracy: "0.003V, ±0.5% between 0-4.5V; 0.01V, ±0.5% between 4.5-30V"Current accuracy: 0.10-20.00A0.01A, ±0.5%Capacity accuracy: "Less than10AH, 0.001AH; 10-100AH, 0.01AH; Greater than00AH, 0.1AH"Cable connection: Separated voltage and current channels, high test accuracyLCD display: voltage, current, time, capacity, energy, etc.Computer connection: "The tester can be connected to a computer via a designated USB-TTL cable to achieve more functions such as graphics calibration, firmware upgrades"Material: Metalcolour: As ShownPackage Contents: 1 x Tester2 x Link cableOnly the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.