Oura Ring Gen3 Charger Size 8 - Fast USB-C Charging Dock

In this review the Oura Ring Gen3 Charger (size 8) proves to be the essential replacement accessory for anyone who owns an Oura Ring Gen3. The bottom line: it is the only official way to charge the Gen3 ring and it does that job well, delivering a full charge in roughly 20-80 minutes depending on starting battery level. For users who want a direct, OEM-compatible charger with a USB-C connection and predictable charging behavior, this charger is a straightforward solution.

Key Features

• Size-specific design: The charger is made to match your Oura Ring Gen3 size so the ring seats securely and charges reliably.
• Fast charging: Expect a full charge in about 20-80 minutes depending on how depleted the battery is, which makes daily top-ups convenient.
• USB-C cable included: The package includes a USB-A to USB-C cable so users can connect to a wide range of 5Vdc power supplies.
• App battery monitoring: You can check the battery level in the Oura app by tapping the circular icon in the upper right of the Home tab for simple status checks.
• Safety compliance: The cable is intended to be used with an external 5Vdc supply that complies with IEC 62368-1, providing clarity on power requirements and safety.

Who It's For

The Oura Ring Gen3 Charger is for current Gen3 ring owners who need an exact, size-matched replacement or a second charger to keep at work or while traveling. It suits people who value convenience and want the official charging solution rather than third-party adapters.

Those who should look elsewhere include owners of earlier Oura ring generations or anyone who does not know their ring size, since chargers are size-specific and will not universally fit multiple ring sizes. If you need a multi-device power station rather than a single-purpose ring dock, this charger will feel limited.

Pros & Cons

Pros

• Official size-specific dock provides a precise fit and consistent charging connection.
• Fast charging capability can restore the ring in as little as 20 minutes from low levels.
• Includes a USB-A to USB-C cable making it simple to connect to common 5Vdc power supplies.
• Works seamlessly with the Oura app for quick battery checks.

Cons

• Because chargers are size-specific you must confirm your ring size before buying to avoid a mismatch.
• Some users report mixed battery life from the ring itself, which is separate from charger performance.

Specifications

Our Verdict

The Oura Ring Gen3 Charger in size 8 is a practical, no-frills replacement that does exactly what it should: charge the Gen3 ring quickly and reliably. It is good value for anyone who needs an official, size-matched dock and prefers the convenience of a fast USB-C charging solution, provided they confirm their ring size before purchasing.

Frequently Asked Questions

How do I check my Oura ring battery level?
You can view the battery level in the Oura app by tapping the circular icon in the upper right-hand corner of the Home tab.

How long does a full charge take?
A full charge on the Oura Ring Gen3 Charger can take approximately 20-80 minutes depending on how much charge remains in the ring.

Do I need a special power adapter?
The included USB-A to USB-C cable requires an external 5Vdc supply that complies with IEC 62368-1; most common USB power adapters meet this requirement.