BatteryMonitor.ps1

# =====================================================
# Battery Monitor Script - Runs in Background
# Shows alert when:
#   - Charging & battery >= 95%  → "Battery Full"
#   - Not charging & battery <= 20% → "Battery Low"
# Alerts only once per event. Resets when condition clears.
# =====================================================

$fullThreshold = 95
$lowThreshold = 20
$checkIntervalSec = 120  # Check every 2 minutes

$notifiedFull = $false
$notifiedLow = $false

Write-Host "Battery monitor started. Checking every $checkIntervalSec seconds..." -ForegroundColor Green

while ($true) {
    try {
        # Get battery info
        $battery = Get-WmiObject -Class Win32_Battery -ErrorAction Stop
        if (-not $battery) { Start-Sleep -Seconds 10; continue }

        $percent = $battery.EstimatedChargeRemaining
        $status = $battery.BatteryStatus  # 1=Discharging, 2=Charging, 3=Fully Charged

        $charging = ($status -eq 2) -or ($status -eq 3)
        $fullyCharged = ($status -eq 3)

        # Debug (optional): Uncomment to see values
        # Write-Host "Battery: $percent% | Status: $status | Charging: $charging"

        # Alert: Battery Full (Charging and >= 95%)
        if ($charging -and $percent -ge $fullThreshold -and -not $notifiedFull) {
            [System.Media.SystemSounds]::Asterisk.Play()
            $wshell = New-Object -ComObject Wscript.Shell
            $wshell.Popup("Battery is now $percent%. Please unplug charger to preserve battery life.", 0, "Battery Full Boss", 0x40)
            $notifiedFull = $true
        }
        # Reset full alert when unplugged or drops below threshold
        elseif (-not $charging -or $percent -lt ($fullThreshold - 5)) {
            $notifiedFull = $false
        }

        # Alert: Battery Low (Not charging and <= 20%)
        if (-not $charging -and $percent -le $lowThreshold -and -not $notifiedLow) {
            [System.Media.SystemSounds]::Exclamation.Play()
            $wshell = New-Object -ComObject Wscript.Shell
            $wshell.Popup("Battery is low: $percent%. Please plug in the charger.", 0, "Battery Low Boss !!!", 0x30)
            $notifiedLow = $true
        }
        # Reset low alert when charging or above 25%
        elseif ($charging -or $percent -gt ($lowThreshold + 5)) {
            $notifiedLow = $false
        }

    }
    catch {
        # WMI might fail temporarily (rare), just wait and retry
        Write-Warning "Failed to read battery info: $($_.Exception.Message)"
    }

    Start-Sleep -Seconds $checkIntervalSec
}