Works fine. Now, I can measure amperes (A) and voltage (V) of devices charging current, as well as real capacity (mAh) of internal device battery. Also tested Power Bank capacity (mAh) during full charge/discharge - as expected real capacity is 60% of nominal (e.g. 3300 mAh power bank can charge only 2050 mAh of device battery). It's also possible to test cords, but for that you need resistor load - I've ordered separately 3A load in another shop.
All OK, thank you.