Yeah, I am seeing some poor battery life from my PS5 controller when using it to bluetooth to the PC.
I can't pinpoint when it was better, but v3.3.3 seems to be harsh.
I may try the new ram site, and download more RAM to my Switch. Not sure if ddr3 is the right ram
for it tho. Edit- no it uses floppy Ram, just like @AncientBoi