Apple Watch Ultra 4 Teases Slimmer Form, Touch ID and Extended Battery

Rumors say the Apple Watch Ultra 4 will be thinner and lighter with improved battery life, potentially via a larger battery and smarter power management using a new T8320 processor. It may also add Touch ID and up to eight health sensors (including blood pressure and hydration) with features like stress detection, aiming for a September 2026 release to sharpen Apple’s edge in the sports-watch market.