The Asus Zenfone 4 Max ZC520KL was announced in 2017, August With 5.2 inches, 74.5 cm2 (~67.6% screen-to-body ratio) IPS LCD, Powered by Qualcomm MSM8917 Snapdragon 425 (28 nm) and running Android 7 (Nougat), upgradable to Android 8 (Oreo), ZenUI 4, the device delivered smooth performance and multitasking capabilities. while the Li-Po 4100 mAh, non-removable ensured long-lasting usage.