Decoding the Apple Watch Ultra 3: 3000-nit display, long-lasting battery.
The Apple Watch Ultra 3 features an upgraded 1.98-inch OLED display with 3000 nits and LTPO3 technology; a 42-hour battery life, charging from 0–80% in 45 minutes; and added blood pressure alerts and satellite SOS in select countries.
The Apple Watch Ultra 3 is the new generation of premium smartwatches, introduced alongside the iPhone 17. While the overall design remains largely unchanged from the Ultra 2, the product focuses on upgrades that directly impact the user experience: a brighter and larger display, LTPO3 technology, longer battery life with fast charging, expanded health tracking features, and the addition of satellite communication for emergency situations in some markets.
Display and LTPO3: 3000 nit brightness for outdoor viewing.
The Apple Watch Ultra 3 uses a 1.98-inch OLED display, 0.6 inches larger than the Ultra 2, according to the source. Brightness reaches 3000 nits – the highest on an Apple Watch to date – ensuring good readability in various lighting conditions. Apple switched from LTPO2 to LTPO3, aiming for a smoother touch experience while optimizing power consumption.
Battery and charging: 42 hours of use, reduced charging time.
Battery capacity is not officially announced; tech experts estimate it to be around 599 mAh, about 35 mAh higher than the Ultra 2. With optimal combination of the processor and LTPO3, Apple claims a battery life of 42 hours in normal mode and 72 hours in Low Power Mode. Fast charging allows for a 0-80% charge in 45 minutes, 15 minutes faster than the previous generation.
Health monitoring: Added blood pressure alerts, while retaining the familiar sensor suite.
A notable new feature is the ability to detect signs of chronic hypertension and send early warnings, helping wearers proactively address cardiovascular risks. The Ultra 3 continues to include functions such as ECG, sleep apnea detection, wrist temperature measurement, irregular heartbeat detection, and retrospective ovulation estimation. This comprehensive health data collection allows users to monitor their body condition over time.
Safety and communication: Satellite SOS and a suite of protective features.
Inheriting features from the iPhone, the Apple Watch Ultra 3 supports satellite communication in emergencies in some countries. When outside of cellular and Wi-Fi coverage, users can use Emergency SOS to send distress signals and location information, send messages via iMessage or SMS, and share coordinates with rescue teams and loved ones. In Vietnam, this feature is not yet supported; users can still use SOS via cellular or Wi-Fi. The watch also integrates fall detection, collision detection, an alarm, and other safety features.
Durability and diving capability: WR100, military standard, and supports diving to 40m.
The Ultra 3 meets MIL-STD 810H durability standards and has a WR100 water resistance rating. The device is waterproof to a depth of 100 meters and supports scuba diving at a depth of 40 meters according to EN13319 standards.
Main technical specifications table
| Category | Information |
|---|---|
| Screen | 1.98 inch OLED, 3000 nit, LTPO3 |
| Battery life | 42 hours (normal), 72 hours (low power mode) |
| Fast charging | 0–80% in 45 minutes |
| Estimated battery | ~599 mAh (estimated, not officially announced) |
| Connect | eSIM; NFC (Apple Pay); iMessage/SMS via satellite in some countries. |
| Audio/voice recording | Dual external speakers, 3 built-in microphones |
| Safe | Emergency SOS; fall and collision detection; siren. |
| Health | Warning signs of chronic hypertension; ECG; detection of sleep apnea; wrist temperature; irregular heartbeat; retrospective ovulation estimation. |
| Durability/Water resistance | MIL-STD 810H; WR100; scuba diving 40 m (EN13319) |
| Case/face | Titan; 49 mm case size |
Main advantages
- With a brightness of 3000 nits and a size of 1.98 inches, the screen is optimized for outdoor reading.
- Longer battery life and fast charging shorten charging time.
- Added warnings about signs of chronic hypertension; a diverse range of health features.
- Satellite SOS provides emergency assistance in several countries; it is fully equipped with safety features.
- Highly durable, water-resistant WR100, supports diving up to 40m according to EN13319 standard.
Limitations and challenges
- The overall design has changed little compared to the previous generation.
- Satellite communication is not yet supported in Vietnam.
- Only available in 49 mm size, two colors (natural titanium, black); limited styling options.
- The starting price is over 1 million VND higher than the Ultra 2 from 2024.
Compared to Ultra 2 and future development
Compared to the Apple Watch Ultra 2, the Ultra 3 directly upgrades three key pillars: display (larger, brighter screen; LTPO3), battery life (42 hours/72 hours; faster charging), and safety/health (high blood pressure alerts; satellite SOS in some countries). These changes focus on users who are active outdoors, play sports, and require close health monitoring. In the near future, the expansion of satellite support will be a notable factor for users in markets not yet supported.
Pricing and versions available in Vietnam
- Apple Watch Ultra 3 wrap-around band (trail, alpine, ocean): 23.99 million VND.
- Apple Watch Ultra 3 with Milanese titanium band: 26.99 million VND.
The product is officially distributed in a single version with a 49mm face, titanium case, and two color options: natural titanium and black.
