LCD Display Backlight USB Detector Ammeter Voltmeter Charging Capacity Tester Meter 4-30V

USB tester, can be used to measure battery voltage, current, dis capacity, etc. Equipped with LCD backlight display, which can display voltage, current and battery capacity data at the same time for easy viewing. Can be used to test the charging voltage and current of electrical appliances such as mobile phones, tablets, mobile power supplies and so on. Condition: 100% Brand New Item Type: USB Tester Material: ABS Color: Black, White (Optional) Input Voltage: 4-30v Voltage Resolution: 0.01V Test Current: 0.05A-3.50A Current Resolution: 0.01A Capacity Range: 0-1 9mAH Accuracy: Plus or Minus 1% Road Consumption: 0.1 Ohm Test Content: Battery Voltage, Current, Dis Capacity (10 sets of data in total) Instructions for Use: 1. Measuring voltage and current: plug the USB male head into a 5V r, plug the female into a mobile phone and other devices, and directly read out the voltage and current parameters 2. Measure the quality of USB cable: plug the mobile phone and other devices into the female , first plug the 5V r with the male head of the machine, remember the voltage, and then use the USB cable from the 5V r to the USB hole of the machine to remember the voltage and voltage gaps The smaller the USB cable, the better the quality. 3. Measure the output capacity and efficiency of the mobile power supply: first connect the machine to the mobile power supply, turn on the mobile power supply, press the button until the capacity data returns to zeroing, insert the mobile phone and it multiple times until the mobile power supply is powered off and automatically shut down. The time the machine is turned on, the display capacity is the mAH output from the mobile power supply. Note that this mAH is much smaller than the nominal mAH. The output mAHxoutput voltage 5V Celsius battery mAHxbattery voltage 3.7V = mobile power efficiency. 4. Data ing: click the button to to the group of data, double-click the button to to the previous group of data. 5. Data reset: Press and hold the button for more than 3 seconds to reset the data in the current group.