PowerTOP is a free Intel tool for making Linux more power-efficient
Ever wondered how your Linux system is using available power limits? Install PowerTOP and see detailed results on how your PC or server uses power.

PowerTOP is a Linux tool created by Intel to monitor and diagnose power usage by running apps and services. It's best used for devices with internal batteries, and you need a way to work out what's draining your internal power source between charges, or those that run continuously, and efficiency is a priority. It's interesting in that the tool lets you manipulate power management settings to experiment with different configurations. Released in 2007, the tool has since been updated to work with modern hardware.