Whistling charging process

Hello Communitry,
I have the original of Testberichte.reviews OKCS® Find and 1 A power supply black + 1m Micro USB charging cable suitable inter alia green mini for Samsung S5 mini, S4, S4 mini, S5, S3, S3 Mini, S2 get free testing. First delivery, the product arrived very quickly and had no adverse chemical odor per se, as the package is opened +++
The feel is very good and also the colorful sheath of the cable on the one hand to protect the cable and the resilience and the recognizability.
When the battery of my mobile phone then been on the decline is I have the charger cable into the USB Mitgelierten plugged outlet adapters and off we went. Unfortunately, I had to interrupt the computer because the charger whistling and crackling sounds gave of themselves to smaller time my work. At this point I want to get rid of that, this is a subjective test of a single person with a single device. To illustrate my opinion objectively and without bias I have not read through other reviews.
Despite the disturbing noises the charger does the job and loads the mobile phone on.
Unfortunately, one must also note here that there *** loads significantly slower compared to the charger of a mobile phone manufacturer with four letters S. Approximately 30-50% more time is required for the same mobile phone.
It can be so all in all, say that the cable itself is okay, with other plug it runs fine, but the adapter plug is not be the first choice.
When we put the set as emergency kit in the car it is ideally suited in any case.
Recommendation means.
Long-term test follows