UNI-T UT658B USB Tester, UNI-T UT658B USB Tester User manual

Hello! I've reviewed the user manual for the UT658B USB Tester. This manual provides instructions on how to use the device to monitor voltage, current, and charge capacity while charging via USB. It also explains how to select quality USB cables by comparing current readings. I'm ready to answer any questions you may have about this device and its functionalities.
What is the input voltage range of the device?

What is the load current range?

How many sets of data can be stored?

What happens if the voltage is outside of the normal range?

UT658B USB Tester User Manual

Specifications

Input voltage (DCV): 3.0V~9.0V; load current (DCA): 0.0A~3.5A; charge monitoring: 0-39999mAh;

data storage: 10 sets

How to use

a. Insert the device into a charger or mobile power and see if the output voltage is within

range. lf not, please stop using it immediately. When the voltage is higher than 5.30V or

lower than 4.70V (USB is 5V), an alert indicator will appear.

b. After confirming the output voltage is normal, users can charge a device by inserting the

charge cable into the device.

c. Short press the key to measure a set of energy data; long press for 1.5s to delete the current

energy record.

d. Users can charge with different cables, compare them through current readings and select

the best quality (the cable that can load the highest current) to save time and energy.