Description:
Input voltage: 3V-7V (can be within 12V)
Voltage resolution: 0.01V
Test current: 0.05A-3.50A
Current resolution: 0.01A
Capacity range: 0-19999mAH
Accuracy: plus or minus 1%
Line loss: about 0.1 ohms
Test content: Battery voltage, current, discharge capacity (a total of 10 sets of data)

Voltage and current measurement: Plug the USB male into a 5V charger, and plug the female into a mobile phone or other devices to directly read the voltage and current parameters.

Test the output capacity and efficiency of the mobile power supply: First, connect the device to the mobile power supply, turn on the mobile power supply, press and hold the button until the capacity data returns to zero, insert the phone multiple times to charge until the mobile power supply runs out and automatically shuts down. The next time the machine is turned on, the displayed capacity is the mAH output of the mobile power supply. Note that this mAH is much smaller than the nominal mAH, with output mAH * output voltage 5V/battery mAH * battery voltage 3.7V=mobile power efficiency.

Data switching: Click the button to switch to the next set of data, and double-click the button to switch to the previous set of data.

Package included:
1xUSB USB Power Current Voltage Tester