nixos-config/config/battery.nix

{ config, lib, ... }:
lib.mkIf (config.machine == "fire") {
  services.upower = {
    enable = true;
    
    usePercentageForPolicy = true;
    percentageLow = 15;
    percentageCritical = 5;
  };

  # Power and temperature management tools
  services.thermald.enable = true;
  services.tlp.enable = true;
  services.tlp.settings = {
    TLP_DEFAULT_MODE = "BAT";
    TLP_PERSISTENT_DEFAULT = 1;
  };
}