Apple Watch Ultra 4: Battery lasts over two days, starts at 6499 yuan

Apple has unveiled the Apple Watch Ultra 4, a smartwatch aimed at athletes and outdoor adventurers. The new model boasts a significantly extended battery life, lasting over two days on a single charge in typical use and up to 45 hours during outdoor activities.

The device incorporates a new health sensing system powered by the S11 chip, enabling more precise heart rate monitoring and increased frequency for heart rate variability (HRV) tracking. A new "readiness index" feature assesses the user's daily physical condition by analyzing sleep, heart rate, and training load.

Starting at 6499 yuan in China, the Apple Watch Ultra 4 will be available for order immediately and goes on sale September 18. It continues to offer a comprehensive suite of health and fitness features, including sleep tracking, heart health notifications, and ECG capabilities.

The S11 chip also enhances audio detection and GPS accuracy. Apple emphasizes that privacy and safety have been central to the development of these new features.