In 2025, the best smart rings last for roughly a week per charge. Want more battery life than that? The new Luna Ring 2 — announced at CES 2025 and one of my 7 favorite wearables at the show — promises four times the longevity, with up to 30 days of battery life. Of course, there's a catch.
The 30-day rating includes the use of the brand's forthcoming, pocket-sized charging case to top off the ring's power supply. Still, with health features and insights seemingly on par with Oura and Samsung, along with promising smart features, like a voice-activated AI assistant, the Luna Ring 2 is worthy of your attention.
