Oura finally confirms Ring 4 has a battery problem, and the fallout is staggering

TL;DR Oura has confirmed battery performance problems affected some Ring 4 units, contributing to an $84.4 million increase in warranty expenses. Oura replaced affected Ring 4s for free and, in some cases, even replaced devices after the one-year warranty had expired. Oura hasn’t revealed which Ring 4 batches were affected, so owners experiencing sudden or unusually fast battery drain should consider contacting support.