Extend laptop battery life, with Aerofoil
Aerofoil is a free program that will help you extend notebook battery life. If you use your laptop often in places where battery charge is impossible, and you are still on Windows 7, you will appreciate this small and efficient utility.
Optionally disabling aero, managing sound muting, your power plans, Windows Sidebar * Optionally showing a quick hibernate button * Changing icon colour to show whether on battery or AC;
Small memory use (about 25%-30% of the size of similar software) * Aerofoil doesn’t poll battery level continuously allowing the CPU save power by being idle more often.