Oura filing reveals the scale of its Ring 4 battery problems

Well, this puts a very big number on the Oura Ring 4 battery problem. In the paperwork for its planned stock market debut, Oura says battery issues affecting certain groups of Ring 4 devices helped drive an $84.4 million increase in warranty expense during fiscal 2025.

That does not mean Oura handed customers $84.4 million or that every Ring 4 has a faulty battery. It does show that the problem became expensive enough to leave a very noticeable mark on the company’s accounts.

Ring 4 replacements pushed warranty costs higher

Oura spells it out in its newly public IPO filing with the US Securities and Exchange Commission⁠. Certain Ring 4 production cohorts experienced battery performance issues, leading to more warranty claims and higher costs as affected rings were replaced free of charge.

Some replacements were even provided outside the normal warranty period. Oura generally offers a one-year limited warranty, except in places where local law requires longer coverage, so that detail suggests the company did not always draw a hard line once the first year had passed.

The filing does not identify the affected batches, sizes or purchase dates. It also does not reveal how many rings were replaced, so Ring 4 owners still have no simple way to check whether their device belongs to one of those cohorts.

Battery complaints are not new territory for the company, and we previously covered battery drain reported by owners of earlier Oura generations⁠. This disclosure is different because it comes directly from Oura and attaches a substantial financial figure to problems with the Ring 4.

Oura’s wider numbers are strong

The battery disclosure sits inside a much bigger IPO story. Oura confidentially filed to go public earlier this year⁠, but the newly released paperwork gives us the first proper look at its finances.

Revenue reached $1.21 billion during the nine months ending June 30, 2026, up 74 percent from the same period a year earlier. Net income climbed from $1.6 million to $60.8 million, while the company sold 3.1 million rings during those nine months.

Oura also had five million paid members by the end of June, twice as many as a year earlier. Membership revenue rose 121 percent to $240.5 million and carried an 89 percent gross margin, with weighted-average 12-month member retention sitting at approximately 85 percent.

Hardware still generated 80 percent of revenue, so manufacturing problems can quickly become costly even with a healthy subscription business behind them. Oura says the Ring 4 warranty increase was tied to earlier design, manufacturing and supplier factors, while testing and quality-control work has since been expanded.

What Ring 4 owners should take from this

Owners seeing a sudden drop in battery life have a stronger reason to contact Oura support, however, even if the standard warranty has recently ended. The company has now confirmed that some affected devices were replaced outside that period, although it has not promised the same treatment in every case.

The newer Oura Ring 5 launched in June⁠ with redesigned hardware, and Oura says it continues to monitor its performance. The filing also warns that current or future generations could experience other quality issues, which is standard risk language but worth noting after such a large warranty increase.