Nightsky RX15 is a high end OLED display laptop that features higher performance than most thinner and lighter laptops out there, and it certainly has some of the best performance from any OLED display based gaming laptop out there.
This Nightsky RX15 has a i7-9750H, RTX 2070, and 4k OLED display that is a dream to use. You can also get a i9-9980HK version that is unlocked and overclock able as well. I have a ton of benchmarks in the video, and I thermally stress test the Nightsky RX15.
As far as battery life goes, I was not able to get graphics switching working while using the laptop, so I do not know how good the battery will be once drivers get fixed for that.
Check out my screen burn in video on OLED Smartphones here: https://youtu.be/eXHEYwGfT-Y