Key Features of the Apple Watch Series 11Extended Battery & Fast Charging: The battery life is extended to 24 hours of normal use (up from 18 hours on older models) and up to 38 hours in Low Power Mode. A quick 15-minute charge provides up to 8 hours of use.Advanced Health Tracking: Features a built-in early-warning system for hypertension alerts (detecting chronic high blood pressure trends), alongside an overnight Sleep Score, sleep apnea detection, ECG, and blood oxygen tracking.Enhanced Durability: The aluminum model features an Ion-X glass display that is twice as scratch-resistant as the Series 10. It also features IP6X dust protection and 50-meter water resistance.Upgraded Connectivity: Introduces 5G cellular options for faster data performance and better coverage directly from the wrist.Design Options: Available in 42mm and 46mm sizes with either aluminum or titanium case finishes.