I've found a number of posts across forums and on archwiki that reference the following solution for this laptop model
echo 1 > /sys/bus/platform/drivers/ideapad_acpi/VPC2004\:00/conservation_mode
This should essentially activate conservation mode for the machine (note: From what I can find the Legion7i classes itself as an ideapad, rather than a thinkpad)
My issue: I can not get the file to shift from 0 to 1.
Tried: The above command as su in terminal AND changing permissions to ensure rw access, and editing via text editor. In every instance when I check the output from the file, its 0.
Note: I dual boot win10. For a time, when setting battery conservation mode on in win10, it would hold for when I booted in to linux. Now, regardless of what OS I boot into, the system seems to revert back to conservation mode off every time. Ive found no relevant settings to battery power/management in the BIOS (ver 4.05).
Im no advanced user, so any info would be great. even if the answer is "cant be done, your machine wont allow it", thanks!