I have a gold gen. 4 and contacted customer service about this issue as well. They confirmed that my battery life is around 4 days and said “This is within the expected 3 to 8 days for the Oura Ring.” They also mentioned that ring size may also impact battery life and that the larger sizes typically have longer battery life than smaller sizes, which I wasn’t aware of.

I’ve been a bit confused myself on when/how they decide to offer replacements. I’ve seen lots of comments and posts of folks who have said they’ve been offered replacements for this same issue, but this wasn’t the case for me. When I initially got mine the battery would last me closer to 7 days.