Hello, for the last year I've been using Sony's WF-1000XM4 Earphones, and during warranty period had almost no complaints to product. But last month or two - coin flipped. Earphones started overheating, for no reason. Due to overheat battery lifetime decreased several times. If usually I had 5-8 hours of playback time, but now - right earphone ~40min, left ~ 60-70min (time may very).

Factory resetting or any troubleshooting process didn't help.

I've tried to contact Sony Ukrainian call centre, or service centre, but didn't get any constructive response. Every proof I shared was ignored. Every link I've sent was denied.

Sadly seems that on Sony Ukraine's opinion warranty period = product life span

Service centre says they would not help because headphones are out of warranty, although this problem is not on my hands, just a defective batch.

Don't know why, but still have last hope for some miracle, such as out of warranty replacement, or something like that.

Anyone got any ideas what should I do, to save earphones and money spent?