Features [Dedicated 18650 Testing] Specifically designed for measuring the capacity of 18650 batteries, this tester supports independent 4 channel internal resistance and capacity measurements. [Integrated Charging and Discharging] With built in charging and discharging system, this tester supports up to 9 cycles of charging and discharging in automatic mode. [Clear Display] The 1.77 inch screen simultaneously displays information such as internal resistance, capacity, voltage, current, and battery level, providing comprehensive data for analysis. [Preset Modes] The tester offers preset automatic and charging discharging modes, allowing users to conveniently select the desired mode upon power on. [Data Reset] The capacity, energy, and time data are automatically reset when the device is powered off or when switching between modes, ensuring accurate and reliable measurements. Specification: Item Type: 18650 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 Chinese switchable Test Quantity: 4 way charge and discharge measurement Internal Resistance Measurement: Supported, using DC two wire method to test internal resistance Charging Function: Supported, automatically powered off after full charge (not support lithium iron 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: The maximum current is around 1A, which is not adjustable and does not support independent transformation Charging Voltage: Controlled by a dedicated battery charging chip, with a maximum charge of about 1A and a full charge voltage of 4.2V Power Off Save: Only save the set parameters, not the measurement data Package List:1 x 18650 Battery Capacity Tester1 x Pry Tool Package List 1 x Battery Capacity Tester