When we think about reducing power consumption of our computers, it’s typically through more efficient hardware. Improvements in manufacturing allowing for die shrinks is a clear way to reduce power consumption, but there’s also something that software i.e. our operating systems can do. Microsoft Windows 7 is better than Windows XP or Windows Vista in power management.
Windows 7 now manages hibernation and standby modes more reliably and efficiently, thus now users would likely be more inclined to use those features rather than leaving the computer on all the time. Furthermore, new IT management and troubleshooting tools are built into Windows 7 to help improve power management. These tools will also help diagnose devices and applications that are causing power issues.
In this video demonstration I explained one command which helps to get detailed report of our computer / laptop power consumption and provides better suggestion.