Battery Capacity Tester 4 Channel Automatic Cyclic Charging Discharging Battery Internal Resistance Meter DC5V Item Type: Battery Capacity Tester Material: PCB Working Voltage: DC5V Applicable Batteries: Suitable for all batteries that meet the requirements of stopping discharge voltage of 2.5-3.5V and starting voltage of 2.8-4.2V (shipped without batteries) Power Supply Interface: 2 way Type C power supply interface (power supply and power cord not included) System Language: English Test Quantity: 4 way charging and discharging measurement Internal Resistance Measurement: Supported, using DC two wire method to test internal resistance Charging Function: Supported, automatically powered off after full charging (does not support lithium iron phosphate battery charging) Discharge Function: Supported, automatically stops when conditions are met, and the discharge current is not adjustable Automatic Charging and Discharging: Supported. At the end of automatic mode, the battery is fully charged Cyclic Charging and Discharging: Supported, adjustable for 1-9 cycles (only supported in automatic mode) Status Prompt: Supported Cooling Method: Fan active cooling Overheat Protection: Supported Stop Discharge Voltage: 2.5V, 2.6V, 2.7V, 2.8V, 2.9V, 3.0V, 3.1V, 3.2V, 3.3V, 3.4V, 3.5V, adjustable in 11 gears Discharge Current: Maximum current is around 1A, not adjustable and does not support independent transformation Charging Voltage: Controlled by a dedicated battery charging chip, maximum charging current around 1A, full charging voltage 4.2V Power Off Save: Saves only set parameters, not measurement data