What's Leaked So Far
Multiple reliable sources (including Samsung's supply chain partners) have confirmed key specs for the Galaxy Ring 2:
Confirmed Specs:
- Solid-State Battery: 25mAh capacity (vs 18mAh in Ring 1)
- Battery Life: 9-12 days (vs 3-4 days in Ring 1)
- Body Temperature Sensor: Continuous monitoring with ±0.1°C accuracy
- Stress Tracking: HRV-based stress detection
- Sizes: 9 sizes (5-13, same as Ring 1)
- Weight: 2.3-3.0g (depending on size)
- Water Resistance: 10ATM (100m depth)
- Release Date: Q3 2026 (July-September)
- Price: $449-$499 (estimated)
Solid-State Battery: The Game-Changer
This is the first consumer wearable with a solid-state battery. Here's why it matters:
Traditional Lithium-Ion vs Solid-State:
| Feature | Lithium-Ion (Ring 1) | Solid-State (Ring 2) |
|---|---|---|
| Energy Density | 250 Wh/kg | 500 Wh/kg (2x higher) |
| Charging Speed | 80 minutes | 30 minutes |
| Lifespan | 500 cycles | 2000+ cycles |
| Safety | Can overheat | No fire risk |
Real-world impact: Charge once per week instead of every 3 days. The ring will last 4+ years before battery degradation becomes noticeable.
New Health Features
1. Body Temperature Monitoring
The Ring 2 adds a dedicated temperature sensor (missing from Ring 1). This enables:
- Illness Detection: Alerts when your baseline temperature rises (early warning for fever)
- Cycle Tracking: More accurate period predictions for women
- Sleep Quality: Temperature drops during deep sleep—Ring 2 tracks this for better insights
2. Advanced Stress Tracking
Using Heart Rate Variability (HRV), the Ring 2 can detect stress in real-time. It'll vibrate gently when your stress levels spike, prompting you to take a break.
3. Improved Sleep Tracking
With the temperature sensor + upgraded accelerometer, sleep stage detection is now 94% accurate (vs 87% in Ring 1), according to leaked internal tests.
Samsung Galaxy Ring 2 vs Oura Ring 4
Oura Ring 4 (released December 2025) is the current market leader. Here's how they compare:
| Feature | Oura Ring 4 | Galaxy Ring 2 (Leaked) |
|---|---|---|
| Battery Life | 7 days | 9-12 days |
| Charging Time | 60 minutes | 30 minutes |
| Temperature Sensor | Yes | Yes (±0.1°C accuracy) |
| Stress Tracking | Yes | Yes (real-time alerts) |
| Subscription | $5.99/month required | Free (Samsung Health) |
| Price | $399 | $449-$499 (estimated) |
Winner: Galaxy Ring 2 for battery life and no subscription. Oura Ring 4 for price and established ecosystem.
Should You Wait or Buy Ring 1 Now?
Galaxy Ring 1 is currently $349 (down from $399 launch price). Here's my advice:
Buy Ring 1 Now If:
- You want a smart ring immediately
- $349 is your budget limit
- 3-4 day battery life is acceptable
- You don't need temperature tracking
⏳ Wait for Ring 2 If:
- You want the best battery life (9-12 days)
- Temperature tracking is important (illness detection, cycle tracking)
- You can wait until Q3 2026 (July-September)
- Budget allows $449-$499
The Verdict
Best Smart Ring of 2026
Samsung Galaxy Ring 2 is shaping up to be the best smart ring of 2026. The solid-state battery alone is a game-changer—9-12 days of battery life vs 3-4 days in competitors.
Leak Confidence: 8/10
Multiple supply chain sources + Samsung's own patent filings confirm most of these specs.
