I tried mine with full brightness, WIFI on, and used chrome for browsing and I got around 4.5 hours, which is still great. This is a real life test not what manufacturers advertise for (Min Brightness, WIFI off mostly, and using Microsoft Edge instead of chrome). Although, I was not on a high performance power plan and that's because when I compile programs using (Visual Studio or Android Studio) or render 3D images, I am always plugged in anyways.