Power supply: DC 19V-20V, 3.5A or above Voltage setting range: 0.00-30.00 stepper in charging mode (0.01V, the maximum voltage is (18V)<br><br>New battery capacity/internal resistance test added to battery test Current 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: "DSC-CC (constant current discharge): the discharge current remains constant, recommended for battery capacity testing DSC-CP (Constant Power Discharge): The discharge power remains constant at all times and is recommended for simulating constant power devices CHG-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 accuracy LCD 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: Metal colour: As Shown<br><br>Package Contents: 1 x Tester 2 x Link cable<br><br>Only 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.