Review on Wireless Charger Xiaomi Mi 20W Wireless Charging Stand, Black by Ngo Quang Cuong  (Cn ᠌

Now about the squeak at work. I plugged the plug into the socket, the device passed the start test. You put the phone on charge (without any cases). Charging starts. And if you put your ear to the charge, you can hear how it squeaks, a small electric squeak, sometimes even like a spark or something similar. I wrote in support of the store, they said send it for verification, say. Wrote at office Xiaomi website, they said we don't know. Goes to an authorized service, they said this is the norm. Went to office. Xiaomi store, checked this and other similar chargers with the seller, this sound is also present there. It turns out that this is still the norm. My room is quiet and sometimes I hear this sound. Therefore, such discomfort and confusion. But I decided to leave.