The Ezreal KW-203 USB Detector has two different colored large 7-segment displays for current and voltage and is easy to keep these values so that at a glance. But he saves nothing and is not therefore to determine the amount of charge, for example, battery packs. The KCX-017 calculates contrast of current and time, the amount of charge in mAh, and stores them in up to 10 different memory locations. But voltage indicator, current, space and amount of charges need space on the display but that's got very small KCX-017 and at that very point of view depends. About the accuracy of both devices can be argued, because there is a wide variation within a series and even the board layout often changes times. Two almost simultaneously purchased KW-203 USB Detector I had two revisions in hand. In principle it can be said that the parts are quite sluggish and need up to 10 seconds at constant load until the refined value. With a load I have created 2 A current and measured with a precise Uni-Trend UT71D multimeter. It had both subjects ads between 1.94 to 2.07 amps. When the voltage is varied at precise 5 volt input voltage to a counter in the decimal place, wherein the Ezreal KW-203 seems to eject the own output voltage with berücksichtigtem plug resistance, whereas the KCX-017, the input voltage measured without taking into account their own resistance and voltage drop.
For accurate measurements, the two devices are not usable, but for home use is the deviation of a Count at the first decimal place in order. Both monitors are inexpensive, and quite recommendable to speak with a large bi-color display or a small screen with a lot of content to different audiences.
