The OnePlus 9 was announced in 2021, March 23 With 6.55 inches, 103.6 cm2 (~87.6% screen-to-body ratio) Fluid AMOLED, 120Hz, HDR10+, 1100 nits (peak), Powered by Qualcomm SM8350 Snapdragon 888 5G (5 nm) and running Android 11, upgradable to Android 12, OxygenOS 12, the device delivered smooth performance and multitasking capabilities. while the Li-Po 4500 mAh, non-removable ensured long-lasting usage.