{
  lib,
  config,
  pkgs,
  ...
}: let
  inherit (lib) mkIf;
in {
  config = mkIf config.battery {
    # power monterting
    services.upower = {
      enable = true;
      percentageLow = 20;
      percentageCritical = 10;
      percentageAction = 4;
      criticalPowerAction = "Hibernate";
    };

    # power profiles
    services.power-profiles-daemon.enable = true;
    #services.tlp.enable = true;

    # packages
    environment.systemPackages = with pkgs; [
      acpi
    ];
  };
}