There's an option to disable notifications light during downtime but there's no such option for battery light.
The battery light also stays on when display is on even that's unnecessary as you usually see the battery icon in status bar (at least Samsung/TW devices turn off the led once you power on the display).
I will try eventually create proper patch for CM...
This module has been merged into new module http://forum.xda-developers.com/xpos...ks-cm-t3279109. Please check that module for any future updates.