What we’re expecting
Ring 5 runs about a week between charges, up from the 5-to-8-day range on Ring 4.
Oura squeezed an extra day out of the Ring 5 without making it bigger, 6 to 9 days per charge, up from 5 to 8 on the Ring 4. That still trails Ultrahuman's Ring Pro, which claims up to 15 days, and the Galaxy Ring 2's rumored 10-day target. Two years of development for one day sounds thin until you remember Oura also shrank the ring, which usually kills battery life.
How does Oura Ring 5's battery life compare?
Standalone runtime per charge, longer is better.
Charging case
Total runtime with the charging case, and whether it's included or a paid accessory.
RingConn Gen 2150 days total · included
Ultrahuman Ring Pro45 days total · $99 optional
Circular Ring 221 days total · included
Samsung Galaxy Ring 1~14 days total · included
Oura Ring 4Banks 5 charges · $99 optional
Samsung Galaxy Ring 2Included (Ring 2, expected)
Evie RingBanks ~10 charges · included
RingConn Gen 3150+ days total · included
Tethered and USB-C-powered devices excluded (no standalone rating).