WF-1000XM4 Battery Drain Issue

[PureFlaws]

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?

[dietervonkhan]

There is no software-side solution to this, the only way to fix it is to manually replace the battery yourself (I've seen tutorials and was considering doing this myself), or contact sony customer services who will replace the buds but only if you spend weeks complaining. I was happy to do that and got mine replaced twice (both outside of warranty), however your experience may differ.

I'm still using mine, post 2nd replacement, had I not been able to get them replaced in both instances I would have sworn off sony entirely.