This high-power battery tester has a LCD digital display, the voltage, current, time, capacity, energy, and other parameters are displayed intuitively, more accurate testing. Support a variety of battery measurements. The tester can be connected to computers via the specified USB-TTL cable for more functions such as graphical calibration, and firmware upgrade. Features: LCD Display: High-power battery tester with LCD digital display, voltage, current, time, capacity, energy, and other parameters are displayed intuitively, more accurate testing. Battery Capacity & Internal Resistance Test: Support a variety of battery measurements, it has newly added battery capacity and internal resistance test function in the battery test. Voltage and current channels are separated, with high testing accuracy. Parameter Setting: Powered by 19V-20VDC, 3.5A or above powersupply. Voltage setting ranges from 0.00-30.00V, stepper in charging mode of 0.01V, the maximum voltage of 18V. Discharge current setting ranges from 0.10-20.00A, stepper of 0.01A, power overrun auto adjust the current. Charging current ranges from 0.10-5.00A, stepper of 0.01A (maximum current depends on powersupply current). Manual Mode: Constant Current Discharge: Discharge current remains constant, recommended for battery capacity testing. Constant Power Discharge: Discharge power remains constant, recommended for simulating constant power devices. Constant Voltage Charging: Charging voltage remains constant, recommended for battery and leadacid battery testing. Auto Mode: The tester supports automatic cycle testing of charging and discharging, recommended for capacity testing. Computers Connection: The tester can be connected to computers via the specified USB-TTL cable for more functions such as graphical calibration, and firmware upgrade. Specifications: Name: Battery Tester Material: metal Item size: 120 * 150 * 120mm / 4.72 * 5.91 * 4.72in Package size: 240 * 210 * 150mm / 9.45 * 8.27 * 5.91in Package weight: 1135g / 2.50lb Packing List: 1 * Battery Tester 1 * Test Clip