Continuing "http://www.autoitscript.com/forum/index.php?showtopic=10993" WMI calls fail very badly if u are running a PC with AC Power, so i have been searchign for any api call to find out ac power supply status, then found GetSystemPowerStatus Function, worked hard on it to extract basic info using Autoit dllcall, then whoa, fool, there is already an UDF properly built by Masters.. i have put my extension as required - just a small piece of information - Battery Capacity When Fully Charged