A:Answer Mine lasts almost 8 hours with mixed use and WIFI / Bluetooth always on and screen brightness at 50%. That's run time, not elapsed time, so if I let it go to sleep or turn the screen off it's longer. I've been tempted to go two days between charges just to see how it goes, but not worth it to risk it. Still, I think that speaks volumes. I use it all day off and on and it never kicks into battery saver at 20%.
If you want to check your battery performance and estimate on Windows 10 open a command prompt (cmd) and type powercfg /batteryreport. It will put an HTML file on your user directory that will give you the estimate along with a ton of other details.
