Sorry, it's my fault. I disabled all energy-saving stuff here: http://www.pichost.org/images/2019/07/31/Optimus3.png They were useless on my older laptops, so I carried on here. Now i've enabled all back and I'm getting +4 hours... Okay, next issue. I can't install iGpu driver from intell, it tells me that i've got incompatible hardware but i'm sure im getting proper one. What's the issue?