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In this section, we’ll discuss the registry keys that are used for power management. You may edit any of them using one of the registry editors.

The registry keys used for power management are listed below.

• HKCU\AppEvents\EventLabels\LowBatteryAlarm – descriptive name of a low battery-power-alarm event
• HKCU\AppEvents\EventLabels\CriticalBatteryAlarm – descriptive name of a critical battery-power-alarm event
• HKCU\AppEvents\Schemes\Apps\PowerCfg\LowBatteryAlarm\.Current, HKCU\AppEvents\Schemes\Apps\PowerCfg\LowBatteryAlarm\.Default, HKCU\AppEvents\Schemes\Apps\PowerCfg\CriticalBatteryAlarm\.Current, HKCU\AppEvents\Schemes\Apps\PowerCfg\CriticalBatteryAlarm\.Default – filenames of the WAV files that will play as a low and critical power-alarm events
• HKCU\Control Panel\PowerCfg\CurrentPowerPolicy – index of current user and machine power policy
• HKCU\Control Panel\PowerCfg\GlobalPowerPolicy\Policies – the user global power policy (binary encoded data)
• HKCU\Control Panel\PowerCfg\PowerPolicies\n\Name – name of power scheme n, where n = 0, 1, 2, etc.
• HKCU\Control Panel\PowerCfg\PowerPolicies\n\Description – descriptive string for power scheme n, where n = 0, 1, 2, etc.
• HKCU\Control Panel\PowerCfg\PowerPolicies\n\Policies – user power policy n, where n = 0, 1, 2, etc. (binary encoded data)
• HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Controls Folder\PowerCfg\LastID – index of the last power policy in the lists of user and machine power policies (for example, if there are six user power policies and six machine power policies in the registry, the value of this key is 5)
• HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Controls Folder\PowerCfg\DiskSpinDownMax – the maximum disk spin-down time that Control Panel will allow the user to set
• HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Controls Folder\PowerCfg\DiskSpinDownMin – the minimum disk spin-down time that Control Panel will allow the user to set
• HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Controls Folder\PowerCfg\GlobalPowerPolicy\Policies – the machine global power policy (binary encoded data)
• HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Controls Folder\PowerCfg\PowerPolicies\n\Policies – machine power policy n, where n = 0, 1, 2, etc. (binary encoded data)