Oura's rings (and other rings that don't have charging cases) come with puck-style chargers, which have to be plugged into USB power to charge. With a charging case, you can go considerably longer ...

and only time will tell if the Oura Ring 4 will surpass it. The other noticeable hardware change is the charger. Like the ...

Though the Ultrahuman Ring Air is primarily a sleep and recovery tracker, it also offers basic exercise monitoring with ...

The Oura Ring app, on the other hand ... which will see you constantly reaching for a charger. That said, charging is faster than the Watch Series 9, taking around 30 minutes to reach 80% battery ...

Oura may be the smart ring brand to beat in ... users can get closer to 30 days of longevity if they occasionally pop it inside of said charger. Samsung offers something similar for the Galaxy ...