Kernel Auditor power suspend state?

Hi all. I finally gave up on finding a over/unclocking app. As bliss comes with KA by default. I'd like to set it up to undervolt when the screen is off. Is that what this option does? I've done tons of searching, and can't find any info. Some of the other apps like set cpu etc. etc. Are out of date by a few years. And would probably be overridden by kernel auditor anyway. Also I heard about one governor that would charge the phone slower, and cause it to hold a charge longer. Any help is much appreciated as I'm kinda lost. Many thanks.

Sent from my LG-D851