systemd-ac-power - Report whether we are connected to an external power source

systemd-ac-power may be used to check whether the system is running on AC power or not. By default it
       will simply return success (if we can detect that we are running on AC power) or failure, with no output.
       This can be useful for example to debug ConditionACPower= (see systemd.unit(5)).

       On success (running on AC power), 0 is returned, a non-zero failure code otherwise.

       systemd-ac-power - Report whether we are connected to an external power source

       The following options are understood:

       -v, --verbose
           Show result as text instead of just returning success or failure.

           Added in version 253.

       --low
           Instead of showing AC power state, show low battery state. In this case will return zero if all
           batteries are currently discharging and below 5% of maximum charge. Returns non-zero otherwise.

           Added in version 254.

       -h, --help
           Print a short help text and exit.

       --version
           Print a short version string and exit.

systemd(1)

systemd 257.4                                                                                SYSTEMD-AC-POWER(1)

systemd-ac-power [OPTIONS...]