nixos/modules/laptop/battery.nix

{ config, lib, ... }:

let inherit (lib) mkOption types;
in {

  options.batMode = mkOption {
    type = types.enum [ "single" "double" ];
    default = "single";
  };

  config = {
    powerManagement.powertop.enable = true;
    services.upower = {
      enable = true;

      # In accordance with the waybar battery colors
      percentageLow = 30;
      percentageCritical = 20;
      percentageAction = 10;

      criticalPowerAction = "PowerOff"; # This can destroy work
      usePercentageForPolicy = true;
    };

    services.tlp = if config.batMode == "single" then {
      enable = true;
      settings = {
        START_CHARGE_THRESH_BAT0 = 65;
        STOP_CHARGE_THRESH_BAT0 = 85;

        CPU_SCALING_GOVERNOR_ON_AC = "performance";
        CPU_ENERGY_PERF_POLICY_ON_AC = "performance";

        CPU_MIN_PERF_ON_AC = 0;
        CPU_MAX_PERF_ON_AC = 100;
        CPU_MIN_PERF_ON_BAT = 0;
        CPU_MAX_PERF_ON_BAT = 65;
      };
    } else {
      enable = true;
      settings = {
        CPU_SCALING_GOVERNOR_ON_AC = "performance";
        CPU_SCALING_GOVERNOR_ON_BAT = "powersave";

        CPU_ENERGY_PERF_POLICY_ON_BAT = "power";
        CPU_ENERGY_PERF_POLICY_ON_AC = "performance";

        CPU_MIN_PERF_ON_AC = 0;
        CPU_MAX_PERF_ON_AC = 100;
        CPU_MIN_PERF_ON_BAT = 0;
        CPU_MAX_PERF_ON_BAT = 75;

        # 0 is first
        START_CHARGE_THRESH_BAT0 = 60;
        STOP_CHARGE_THRESH_BAT0 = 85;

        # 1 is second
        START_CHARGE_THRESH_BAT1 = 60;
        STOP_CHARGE_THRESH_BAT1 = 85;
      };
    };

  };
}