Battery Warning when charged upto a Limit {here 80%}

Battery.vbs

set oLocator = CreateObject("WbemScripting.SWbemLocator")
set oServices = oLocator.ConnectServer(".","root\wmi")
set oResults = oServices.ExecQuery("select * from batteryfullchargedcapacity")
for each oResult in oResults
   iFull = oResult.FullChargedCapacity
next

while (1)
  set oResults = oServices.ExecQuery("select * from batterystatus")
  for each oResult in oResults
    iRemaining = oResult.RemainingCapacity
    bCharging = oResult.Charging
  next
  iPercent = ((iRemaining / iFull) * 100) mod 100
  if bCharging and (iPercent > 80) Then msgbox "Battery is 80% charged"
  wscript.sleep 30000 ' 5 minutes
wend