gistfile1.txt

 systemctl cat --user git-sync-powersavehelper
# /home/norangshol/.config/systemd/user/git-sync-powersavehelper.service
[Unit]
Description = Disable and Enable git-sync depending on AC power
ReloadPropagatedFrom = sys-susbsystem-power_supply-main_AC.device

[Service]
ExecStart = /usr/bin/env git-sync-powersavehelper
ExecReload = /usr/bin/env git-sync-powersavehelper 
RemainAfterExit=true

[Install]
WantedBy = sys-subsystem-power-supply-main_AC.device
norangshol@enceladus:~$ cat ~/.local/bin/git-sync-powersavehelper 
#!/usr/bin/env sh

if /lib/systemd/systemd-ac-power ; then
 echo "Power On: $(date)"
else
 echo "Battery On: $(date)"
fi

$ systemd-analyze verify --user git-sync-powersavehelper.service
norangshol@enceladus:~$ echo $?
0