anacron is also not invoked when system boots on battery and later on connected is to AC power, because systemd does not detect this change! This is a no go for laptop users as they very rarely get notified of pending updates, because the usual way is to connect the laptop to AC power only when battery capacity is/gets low. Currently notification for updates only works if laptop runs on AC power when booted up!
My workaround with good old udev rules I took from Arch-wiki: https://wiki.archlinux.org/index.php/Power_management#Tools_and_scripts I set up two udev-rules: /lib/udev/rules.d/98-powersave.rules # ATTR values: "0" = on battery; "1" = on AC power SUBSYSTEM=="power_supply", ATTR{online}=="0", RUN+="/usr/sbin/pm-powersave true" SUBSYSTEM=="power_supply", ATTR{online}=="1", RUN+="/usr/sbin/pm-powersave false" Woirks great.
