Using powershell to get a battery health report with output written to console or to text file

Question

As the title asks. I am aware that I can use powercfg /batteryreport to write out an HTML file with the information I'm looking for. I would like to get this information as text output in powershell if there is a way. I will be loading this information into a logging and alerting platform so we can be notified when laptop batteries are starting to need replacing.

Answer 1

A bit late to the conversation … but this is what I use to get the battery health of my laptops .

$InfoAlertPercent = "70"
$WarnAlertPercent = "50"
$CritAlertPercent = "20"
$BatteryHealth=""
& powercfg /batteryreport /XML /OUTPUT "batteryreport.xml"
Start-Sleep 1
[xml]$b = Get-Content batteryreport.xml

$b.BatteryReport.Batteries |
    ForEach-Object{
        [PSCustomObject]@{
            DesignCapacity = $_.Battery.DesignCapacity
            FullChargeCapacity = $_.Battery.FullChargeCapacity
            BatteryHealth = [math]::floor([int64]$_.Battery.FullChargeCapacity/[int64]$_.Battery.DesignCapacity*100)
            CycleCount = $_.Battery.CycleCount
            Id = $_.Battery.id
        }

        if (([int64]$_.Battery.FullChargeCapacity/[int64]$_.Battery.DesignCapacity)*100 -gt $InfoAlertPercent){
            $BatteryHealth="Great"
            write-host "Battery Health is $BatteryHealth"
        }elseif (([int64]$_.Battery.FullChargeCapacity/[int64]$_.Battery.DesignCapacity)*100 -and ([int64]$_.Battery.FullChargeCapacity/[int64]$_.Battery.DesignCapacity)*100 -gt $WarnAlertPercent){
            $BatteryHealth="OK"
            write-host "Battery Health is $BatteryHealth"
        }elseif (([int64]$_.Battery.FullChargeCapacity/[int64]$_.Battery.DesignCapacity)*100 -and ([int64]$_.Battery.FullChargeCapacity/[int64]$_.Battery.DesignCapacity)*100 -gt $CritAlertPercent){
            $BatteryHealth="Low"
            write-host "Battery Health is $BatteryHealth"
        }elseif (([int64]$_.Battery.FullChargeCapacity/[int64]$_.Battery.DesignCapacity)*100 -le $CritAlertPercent){
            $BatteryHealth="Critical"
            write-host "Battery Health is $BatteryHealth"
        }
    }

Answer 2

WMI might get you what you need:

Get-WmiObject Win32_Battery
Get-WmiObject -Class BatteryStaticData -Namespace ROOT\WMI
Get-WmiObject -Class BatteryFullChargedCapacity -Namespace ROOT\WMI

Or try something like this: proactive-battery-replacement-with-endpoint-analytics

Answer 3

Hello @Brandon Poindexter

By design powercfg output only allows HTML or XML formats: Link

Hope this helps with your query,

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--If the reply is helpful, please Upvote and Accept as answer--

Answer 4

Powercfg can produce an XML file, too. You can deal with that pretty easily. For example:

[xml]$b = Get-Content C:\Junk\battery.xml

$b.BatteryReport.Batteries |
    ForEach-Object{
        # if there are multiple batteries you'll get an array for each property (one entry for each battery)
        [PSCustomObject]@{
            DesignCapacity = $_.Battery.DesignCapacity
            FullChargeCapacity = $_.Battery.FullChargeCapacity
            CycleCount = $_.Battery.CycleCount
        }
    }

The output looks like this (for a machine with two batteries):

DesignCapacity FullChargeCapacity CycleCount
-------------- ------------------ ----------
{23200, 62200} {21720, 63590}     {5, 19}