We don't know what percentage that Apple triggers the alert and the return of the indicator, prior to you swapping the battery out. Others have commented that, while they got a message that all features won't be available, while operating in low battery mode, that they couldn't determine what features didn't work.Kinda dismayed by the battery levels disappearing. It was good to know when one was starting to get low so that I could have a spare ready or replace it ahead of time when I'd need it to not go dead while I'm away.
I never once got percentages on any of my AirTags - they always showed as fully charged. Been on the beta train - so we saw this removed some time ago. It could be that the percentage reporting was inaccurate, so they removed it. Better that, than having people calling support when their airtag dies, but it was reporting 90% remaining earlier in the day.But it begs the question, why remove it in the first place? The phone still has to pull the battery level from the AirTag, so there's no technical reason to drop the meters. Better yet, why was its removal not listed in the changelog for the update? I'm still on iOS 15, so it was a small update. No more quick check to see that one AirTag is still nearly fully charged, another is at 50%, but oh, the one on my keys is at 30%. I better pick up a battery at the store soon. Now, it's, "Surprise! 4 AirTags will die soon."
I'm getting tired of these asinine changes.