The Apple Watch Series 9 was announced in 2023, September 12 With 1.9 inches Retina LTPO OLED, 2000 nits (peak), Powered by Apple S9 and running watchOS 10, upgradable to watchOS 10.1, the device delivered smooth performance and multitasking capabilities. while the Li-Ion 308 mAh, non-removable ensured long-lasting usage.