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  • 02/01/2018

    Supports Quickcharge 2.0 and 3.0 with voltages up to 24V and 3A current. Very clear LCD screen, the units has 2 buttons on top and 2 buttons on the bottom that are helpfully labeled in every screen. The display shows momentary voltage and current along with accumulated mAh and mWh. The unit has 10 data groups, Group 0 always resets the accumulated data to 0 when you re-connect the device while groups 1 - 9 remember the data. You can set a minimum trigger current below which the unit will stop counting data (for example if you monitor the charging of a powerbank it might still draw 0.02A even after it is full, if you want to stop counting at that point you can set the trigger current to -for example- 0.05A), a feature i have not seen before on similar devices. Another unique feature is the cable impedence test where you connect the unit (with a load) to a power source and take a measurement, then you unplug the device and connect it via a USB charging cable to take a second measurement, eventually giving you the resistance of the cable. The most prominent feature of this unit of course is the ability to show a Voltage & Current graph, sadly i find that a bit lacking as the screen only shows the last 12 seconds of data, it also resets the graph when you move to another screen. The graph feature seems much more useful in the available PC software that you can connect via bluetooth (UM24C version only), giving the all the functionality of the device in a Windows program along with the possibility of exporting the recorded data. Unfortunately i have not been able to test the connectivity yet since i lack a USB Bluetooth dongle. Overall a very useful USB charge monitor with a colorful screen as opposed to a difficult-to-read segmented LCD-Display.

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  • 26/03/2018

    I have several usb meters, and this one is far better than all others. I really like 1 mA resolution. It really shines when you use mobile or desktop app. It is even more useful when you pair it with electronic load: http://bit.ly/2FRl45r

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