Smart Ring Battery Runtime Calculator

The battery life on the box assumes you never touch the extra features. Toggle on the sensors and settings you actually use and watch the real-world estimate change. Nothing uploaded.

Oura & Ultrahuman presets SpO2 monitoring ? Skin temperature tracking Adjusted vs. baseline runtime

Ring Model

Smart ring model

Baseline runtime override (days)

Features You Use

Continuous SpO2 monitoring ? -20% Continuous skin temperature tracking -10% Frequent haptic feedback / alerts -10% Airplane mode / minimal Bluetooth sync +15%

Results

Baseline runtime

days, as advertised

Your adjusted runtime

days, with your features

Change from baseline

Why This Matters

Manufacturer battery ratings are measured under ideal conditions, usually with always-on features disabled. SpO2 sensors, temperature sensors, and frequent haptics all draw extra power from a battery that's already tiny. This estimate is illustrative, not a guarantee - your actual runtime depends on ring firmware, skin contact quality, and Bluetooth signal strength.