For most users it’s just isn’t checked in power settings as an option for the power menu.

But Group Policy can disable it, but I was able to get around that and re-enable it, in regedit. Luckily they don’t seem to repush the GP often, or maybe it’s an image setting that was only set during initial imaging.

You need to stop using sleep mode and start using hibernation.

Sleep uses the battery, hibernation turns everything off, but saves what you had open, etc to the hard drive. Just like sleep but no battery loss, will take a few more seconds to start back up.