A:AnswerReal world mixed usage 5 - 6 hours. Don't listen to HP support that post here, because they'll tell you 4-6 is normal when you contact support about poor battery life.
A:AnswerAccording to the full specs sheet here: https://support.hp.com/us-en/document/c06182132 it does feature an HP Sure View Integrated Privacy Screen
A:AnswerThank you for reaching out, it is not 4K. This models screen is an HP Sure View Integrated Privacy Screen 13.3" diagonal FHD IPS micro-edge WLED-backlit touch screen with Corning® Gorilla® Glass NBT with a resolution of 1920 x 1080.