refactor: complete rewrite

modules/nixos/hardware/features/battery.nix

@@ -0,0 +1,44 @@
+{
+  lib,
+  config,
+  pkgs,
+  ...
+}: let
+  inherit (lib) mkIf;
+  inherit (builtins) elem attrValues;
+  inherit (config.ooknet.hardware) features;
+in {
+  config = mkIf (elem "battery" features) {
+    services = {
+      # cpu power usage optimizer
+      auto-cpufreq = {enable = true;};
+
+      # application interface for power management
+      upower = {
+        enable = true;
+        percentageLow = 25;
+        percentageCritical = 5;
+        percentageAction = 3;
+        criticalPowerAction = "Hibernate";
+      };
+
+      # daemon for monitoring and controlling temperature
+      thermald = {enable = true;};
+
+      # put this here because if we are enabling the battery modules
+      # we are most likely using a laptop
+      # lidSwitch defines the action to perform when the laptop lid is
+      # closed
+      logind = {lidSwitch = "suspend";};
+    };
+    boot = {
+      kernelModules = ["acpi_call"];
+      extraModulePackages = attrValues {
+        inherit (config.boot.kernelPackages) acpi_call cpupower;
+      };
+    };
+    environment.systemPackages = attrValues {
+      inherit (pkgs) acpi powertop;
+    };
+  };
+}