| Title： | USB Voltage Ammeter Power Capacity Mobile Power Tester Battery Capacity Tester V20 | ||
| Product name: | digital voltage measuring instrument V20 | Voltage: | input/output voltage: 3-9V, voltage resolution: 0.01V |
| Size: | 59 (with USB73mm) * 23 (width) * 13.5 (height) mm | Current: | input/output current: 0-3A, current resolution: 0.01A |
| Accuracy: | ±1% | Line loss: | about 0.1Ω |
| Weight: | 30g | ||
| Product manual: | ①.IN-The input end is connected to the output port of the charger ②. RESET-Press the reset button for 3 seconds to reset the screen display ③.OUT-The USB port where the output terminal is connected to the data line ④. Input voltage display window (4-20V), accuracy ±1% ⑤. Working time display window (0-99H), unit: minute ⑥. Charging current display window (0-3A), accuracy ±1% ⑦. Battery capacity display window (0-99999mAH) **Working time and capacity display with memory function after power off** |
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| Note: | V20 model Z high voltage 9V does not support QC2.0! | ||
| Measuring voltage and current: | Plug the USB male plug into the 5V charger, the female plug into the mobile phone and other devices, and you can directly stay alone with the voltage and current parameters To |
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| Test battery capacity: | Use a linear charging circuit such as TP4056 to charge a completely dead battery to full capacity through this capacity meter, and the capacity reading is the battery capacity. This method can also measure the charging capacity of the mobile phone, and even calculate the charging efficiency of the mobile phone. | ||
| Measure the output capacity and power of the mobile power supply: | First connect this machine 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 mobile phone several times to charge until the mobile power supply is out of power and automatically shut down. The next time the machine is turned on, the displayed capacity is the mAH output by the mobile power supply. Note that this mAH is much smaller than the called mAH, the output mAH*output voltage 5V/battery mAH*battery voltage 3.7=mobile power efficiency | ||
| Data reset: | Press the reset button for 3 seconds to reset the screen display | ||
| Package: |
1*USB tester |
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On Dec-15-20 at 20:55:36 PST, seller added the following information: