Windows 7 has some pretty cool new features and one of those is the energy efficiency report. What’s that you ask? It basically lets you find out what is eating up all your battery power and analyze the efficiency of your computer.
So how can you run this report? Well, first you need to make sure you run it when your computer is idle and you have exited all programs. Now start an elevated command prompt in Windows 7.
via How to Run a Power Efficiency Report in Windows 7.
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