It's been over a year since I've had them. Faced like many with squeaks in the left ear. At first I was upset and wanted to carry them back to the store. But after studying the forums, I came to the conclusion that it is possible to apply silicone grease to the attachment points of the speaker housing to the headband and the squeak disappears, although temporarily. I do this procedure every 2-3 months. We can say that this is like a scheduled maintenance :) At the moment, the battery confidently holds 2-3 days of use in the mode from 4 to 8 hours a day. But I do not use them every day, so I charge somewhere 1-2 times a week. I do not recommend walking down the street in them (although I myself sometimes do this and have seen others), because firstly, dust from the street gets into moving elements, which provokes squeaks. Dust can be blown out with compressed air, but still. Secondly, if you get caught in the rain, then moisture can get into one of the many holes in the case, and small grains of sand and dust are also quite well stuffed there. Well, on plastic everything will be very clearly visible.