USB tester "Keveisi KWS-V20" allows you to measure the voltage of the power source (charging for the phone, computer port, powerbank, etc.), the current consumed by the load, and the battery capacity of the connected device. Also, the instrument shows the charging time. With this device, you can measure the consumption of any load connected to a USB source, and also check if the source voltage matches the nominal values.
Link: http://ali.pub/4126ko

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