Show devices which are power managed

## Put PnP device ids into a hashtable (dictionary) for fast lookup of friendly names
[hashtable]$devices=@{} ; Get-PnpDevice|ForEach-Object{ $devices.Add( $_.InstanceId  , $_.FriendlyName ) }

Get-CimInstance -ClassName MSPower_DeviceEnable -Namespace root\wmi | Select-Object -Property @{name='FriendlyName';expression={$devices[ $_.InstanceName -replace '_\d+$' ]}}, Active,Enable,InstanceName | Sort-Object -Property FriendlyName

## Optionally change Power Management state by changing "Enable" property of the object(s) returned from Get-CimInstance and pipe through Set-CimInstance