Python NSSM Windows Service Battery Logger

1. Install nssm.exe

2. Copy C:\Program Files\Python38\Lib\site-packages\pywin32_system32\pywintypes38.dll
   as C:\Program Files\Python36\Lib\site-packages\win32\pywintypes38.dll

3. Create this file, "D:\scripts\gsBatteryLog.py"
#################################################
import os, re, datetime, time
counter = 0
while True:
	if counter % 60 == 0:
		file = open( "D:/scripts/.gsBatteryLog.txt", "a" );
		output = os.popen( "wmic Path Win32_Battery Get EstimatedChargeRemaining /Value" ).read()
		percent = re.compile( r"[^0-9]", re.MULTILINE ).sub( "", output )
		file.write( datetime.datetime.now().isoformat() )
		file.write( " " )
		file.write( percent )
		file.write( "\n" )
		file.close()
	time.sleep( 5 )
	counter = counter + 1
#################################################

4. Install and start service
   > nssm.exe install GSBatteryLog "C:\Program Files\Python38\python.exe" D:\scripts\gsBatteryLog.py

5. Buka "services.msc" dan Start service "GSBaterryLog"