VBScript to find out if Laptop Battery has charged

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 > 79) Then msgbox "Unplug charger."
  wscript.sleep 30000 ' 5 minutes
wend