Here are some tricks to optimize power consumption on a laptop.
First install it:
pacman -S powertop
Then create /etc/systemd/system/powertop.service to enable it as a service.
[Unit]
Description=Powertop tunings
[Service]
Type=oneshot
ExecStart=/usr/bin/powertop --auto-tune
[Install]
WantedBy=multi-user.target
Then enable it as a service.
systemctl enable powertop
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