Automatic save without operation 5 seconds after the value setting is complete. The minimum discharge stop voltage of 18650 battery is 2.75V. In general, when the voltage is reduced to 0.875 times of the rated voltage (3.24V), it should be , and if it continues to be used, the voltage drop , and it may be damaged by overdischarge, which affect the life span. (recommended discharge termination voltage set to 3.5V) The charging voltage is generally 4.20V-4.3V/4.35V. Measurement time calculation, Assuming that the battery capacity is 2000mAH, the discharge current of this detector is about 500mAH. the measuring time is about 4 hours. Product name:18650 lithium battery capacity tester Display accuracy:0.1 Measurement accuracy:1mAH Power supply voltage:DC5-12V/18650 battery standby current:5mA Discharge current:about 500mA Load power:10W 8Ω Set the discharge stop voltage and the display 888 to restore the factory setting at the same time. Short :start / pause switching Short :mAh/mWh toggles display Long :data zero Color:Green Material:PCB+Plastic Package Contents: 1 * lithium battery capacity tester Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.