You can also close the lid and trust it to stay off and open it up even a week later and resume at the same place you left off with very little battery usage. How no one else can figure out how to do this in almost 15 years or more is beyond me.
Happens on my ASUS ROG Zephyrus G14, personal laptop frequently enough i do a full power down when not using it. Definitely a hardware/Windows problem.
it does two things, normal power sleep + writes a memory snapshot to disk. So even if it runs out and powers down completely it still puts you back where you were when you plug it in and open lid, just a bit slower and you need to auth