The phone also has a new ROG UI, based on the Android Pie operating system. The UI looks close to stock Android and comes with some value-added features for general improvement. It looks neat and feels swift. The phone handles tasks without any hiccups and its everyday performance is glitch-free.
The ROG Phone-II is powered by a 6,000 mAh battery, which keeps it going for two days straight on single charge (when the phone is used for mixed utilities, such as calling, messaging, internet browsing, casual gaming, etc). Playing graphic-intensive games and streaming videos consume the battery more rapidly, but the phone still manages to sail through one day. The phone supports fast charging, which takes around three hours to juice up a completely drained battery.