Program that measures and record total power usage?

I am trying to quantify the effects playing games has on my laptop. I use GPU-Z to look at the temperature of the video card and Core Temp to do the same for the processor. Both write a temperature and a time out to a log file so I can then plot them together on the same graph.

Does anyone know of a program that does this for the total power usage of the system? Meaning, something that writes the equivalent of "You're using X watts at time T" to a file.

 

Not sure, but I don't think most (any?) laptops have sensors to measure total-system electricity usage.

You could probably plot/check it manually, by removing the battery and using a device like this.

 

I use the Killawatt plug, same as the one in Tony's link. The laptop in my signature does about 32w while surfing and hits about 60w when I play BF2.

 

What he said.

 

Thanks. That would work, but it's not what I'm looking for. Interestingly enough, there is a way to do it from software in Linux as long as one has ACPI (see here for example: http://www.thinkwiki.org/wiki/How_to_measure_power_consumption ), but I don't game in Linux so that's not all that helpful.