Get Battery and AC power adapter connection status via PowerShell

To get the current information whether the machine is on power programmatically via powershell, you can use for example something like this:

(Get-WmiObject -Class BatteryStatus -Namespace root\wmi -ComputerName "localhost").PowerOnLine

However, from my testing on some Lenovo models I discovered that sometimes I get two objects returned by this command (like True, True, or True, False) – so you need to go through the array:

Function isOnPower {
    try{
        $power = (Get-WmiObject -Class BatteryStatus -Namespace root\wmi -ComputerName "localhost").PowerOnLine
        $final = $False
        Foreach ($p in $power)
        {
            if ($p -like "True"){$final = $True}
        }
        return $final
    } catch
        {return 1}
}

This seems to be working well so far.

Also, the whole class BatteryStatus provides even more information, so you might be able to work with even more detailed data:

(Get-WmiObject -Class BatteryStatus -Namespace root\wmi -ComputerName "localhost")