Looking for a specific type of "Battery Tracker" app

[nicenoise]

Looking for a mac app that will track my batter usage in a very specific way. I basically want to accurately see how long my battery lasts from the moment I open the lid of my Macbook Pro, to when I close it and put it to sleep. I don't care so much about standby time, I'm more concerned about tracking actual Battery usage.

Is there an app out there somewhere that will automatically count time in this way?

Thanks!!