With completely wireless earbuds, the rule is: when the battery fails, they have to be disposed of. Not so with the Fairbuds, that allow you to replace batteries in just a few seconds. Combined with a repairable design, the earbuds should therefore have an extremely long lifetime.
I’ve not been able to listen to high bitrate SBC myself, but that tracks with my understanding, too. I read this article - https://habr.com/en/articles/456182/ - recently, when trying to confirm my understanding of why there’s such a huge difference in sound quality from codec to codec.
What setup do you have where you’re able to listen to 552 kbps SBC?