Features: Internal resistance test: The product uses the DC two-wire method to test the internal resistance of the battery, and the accuracy is high when the battery is fully charged. Capacity test: The capacity test is carried out by resistance discharge, and the results is only the capacity measured between the start of the battery discharge and the stimulate stop during the test phase. Record the cumulative capacity, energy and time during discharge. Digital display: The digital display clearly displays the real-time voltage, real-time current, real-time power, cumulative capacity, cumulative energy, status indication, working mode, stop discharge voltage, cycle times, battery internal resistance and cumulative time. Charging function: external 5V power supply, the maximum current of 1A is passed through the charging chip during charging, and the capacity and power of the charging time will be recorded during the charging process. Notice: 1.Actual color may be slightly different from the image due to different light effect 2.Please allow 1-3cm deviation due to manual measurement Description: Working voltage: DC5V Detection voltage: Capacity measurement range: 0~99999mAh Energy measurement range: 0~99999mAh Charge and discharge time reference AUTO (automatic mode): Charging the battery (discharged in advances) ~ the default current discharge is about 1A, 1704mAh ~ fully charged again to stimulate the program to stop, it takes 437 minutes and 23 seconds (discharge mode): When the battery is fully charged, discharge 1681mAh with a current of about 1A, which takes 118 minutes and 55 seconds (charging mode): When charging, the capacity and energy are not measured, only the time is recorded, and the 1681mAh battery takes 164 minutes and 51 seconds to fully charge Package List: 1 x Battery Capacity Tester