documentation/docs/alpine-desktop-setup/post-install/power-management.md

Power management

Acpi

During installation Busybox's acpid has already been replaced by the regular acpid which means that it has to be configured in /etc/acpi/handler.sh. The default configuration works but by default will not suspend the device if an AC adapter is connected even if the lid is closed. Therefore it's recommended in button/lid:*:close:* to change it to:

#power-supply-ac || suspend
suspend

TLP

To optimise battery on the device it's recommend to install tlp and activate it's service:

# apk add tlp
# rc-update add tlp default

tlp can be configured in /etc/tlp.d but the default configuration already works.