Ultrahuman Pro Ring lasts 15 days

A smart ring finally lasts longer than a workweek.

Ultrahuman is doubling down on battery life with its new Pro ring, a wearable that promises up to 15 days between charges and ships with a charging case that itself can power the device for up to 45 days. It’s not a cosmetic upgrade: Ultrahuman re-engineered the hardware from the ground up, packing a dual-core processor with on-device machine learning to crunch biometrics without constantly pinging the cloud. The device also carries more internal memory—enough to store 250 days of data before a sync is required with a smartphone. In short, Ultrahuman is aiming to erase the perennial complaint of “charge it again?” that has plagued smart rings since they first hit the market.

The Pro ring builds on a familiar challenge for wearables: energy efficiency. With thinner form factors, vendors have historically traded battery life for features or compact processors that can’t keep up with thick data streams. Ultrahuman’s answer is twofold: a more capable chip that does heavy lifting on-device, and a larger battery that doesn’t demand a daily charging ritual. The result is a ring that can accompany the wearer through days of activity, uninterrupted sleep tracking, and continuous physiological monitoring—without the constant “dock it now” reminder.

The hardware refresh isn’t happening in a vacuum. The Pro’s accompanying battery case adds another layer of practicality. The case provides power for up to 45 additional days, addressing the “I forgot to charge” problem that derails long-term use for many. It’s a tidy package for travelers or people who forget to bring charging gear on weekends away. Still, the larger ecosystem questions loom: how well does the ring integrate with Sleep, HRV, and activity dashboards across dominant health ecosystems? And what about price? The Engadget report doesn’t disclose pricing or subscription terms, which are crucial for a product that sits at the premium end of wearables.

From a consumer-advocate lens, this upgrade highlights two industry trends. First, battery life remains the ultimate gatekeeper for habitual use. A 15-day cycle reduces friction, potentially turning a “nice-to-have” gadget into a daily habit. Second, on-device processing is no longer a niche perk; it’s a practical necessity for longevity and privacy. By processing data locally, Ultrahuman can trim data transmission, cut latency, and offer faster feedback without sapping energy. The Pro’s 250-day local data reservoir also makes it easier to generate longitudinal insight without constant syncing.

That said, a few caveats matter for buyers. The absence of a disclosed price or subscription structure makes it hard to judge total cost of ownership. Wearables often compound the upfront price with ongoing app or service fees, so pricing visibility will be a deciding factor for many. Also, comfort and ring size still dominate long-term wearability: even with a robust battery, a heavy or ill-fitting ring can negate the time-saved by longer life. Finally, real-world performance will hinge on software quality—how smoothly the health metrics map to meaningful insights and whether the on-device ML adds value without introducing calibration quirks.

Verdict: Buy if your current ring struggles for battery life or you prize long-lived offline data processing and you’re willing to pay for premium features. Wait if you need transparent pricing, ecosystem compatibility, and a test-drive on Android or iOS before committing. The Pro ring is a bold step forward, but the overall value hinges on price, software polish, and how it fits your existing health-tracking setup.