Item Type: Battery Internal Resistance TesterMaterial: PCBScreen Size: Approx. 1.77in / 4.5cmWorking Power Supply: DC5V power supply or 18650 battery x 2 (shipped without battery)Applicable Battery: Suitable for all batteries that meet the requirements of stopping discharge voltage of 2.5-3.5V and starting from 2.8V to 4.2VPower Supply Interface: Type C interface, power supply line self prepared (C port mobile phone line) System Language: Chinese (default), EnglishTest Quantity: 1 way charging and discharging measurement (only right battery position)Internal Resistance Measurement: Support, use DC two wire method to test internal resistanceCharging Function: Support, automatic cut off charging when fully charged (lithium iron phosphate battery charging is not supported)Discharge Function: Support, automatically stop when conditions are met, and the discharge current is not adjustableAutomatic Charging and Discharging: Support. The battery is fully charged at the end of automatic modeCyclic Charging and Discharging: Support, 1 to 9 cycles adjustable (only supported in automatic mode)Status Prompt: SupportStop Discharge Voltage: 2.5V, 2.6V, 2.7V, 2.8V, 2.9V, 3.0V, 3.1V, 3.2V, 3.3V, 3.4V, 3.5V, 11 adjustable gearsDischarge Current: Two circuit resistance, maximum current of about 1A, non adjustable, independent transformation not supportedCharging Voltage: Controlled by a special battery charging chip, with a maximum charge of about 1A and a full charge voltage of 4.2VPower Off Saving: Only save the set parameters, not the measurement data .wang-edit-text{ font-family:'Arial' !important; } .wang-edit-text table { border-top: 1px solid #000; border-left: 1px solid #000; } .wang-edit-text table td, .wang-edit-text table th { border-bottom: 1px solid #000; border-right: 1px solid #000; padding: 3px 5px; } .wang-edit-text table th { text-align: center; } 1Scope of Application: This battery capacity tester is mainly used for test the capacity of 18650 battery, check for better using experience! 2LCD Display: The 1.77in screen displays internal resistance, capacity, voltage, current, power and other information at the same time. 3Modes Adjustable: Preset automatic and charging and discharging modes, and select corresponding modes after starting. 4Data Reset: The power off, mode switch will make the data capacity, energy and time data automatically reset. 5Working Instructions: Some components will produce local high temperature during charging and discharging during use. Please ensure that the use environment is open and free of cover. It is better to increase fan heat dissipation. In order to ensure that the battery clamp is firm, the 18650 battery tester is more suitable for flat head battery measurement. 6DIY Transformation: Firstly, add 21700 battery holder. Then, connect the battery outside the extension cable or crocodile clip for testing.