Of all the power-saving states in Windows 7, hibernation uses the least amount of power,so you can enable hibernate to save more power or let you battery can support more time for you laptop.Below is a simple guide for how to enable or disable hibernate in Windows 7
1.Click Start ,go to All programs — Accessories ,then click Command Prompt (Or click Start type cmd in search box ,then press Enter)

2.To enable hibernate , type in command powercfg -h on then press Enter,to disable hibernate just type in command powercfg -h off then press enter
powercfg -h on
or
powercfg -h off

3.Exit command prompt window,now you have finished enable or disable hibernate in windows 7,and you can continue below steps to specify how long your laptop is inactive before hibernating
4.Go to Control Panel(small icons view) and click Power Options ,then click Change plan settings of your current power plan

4.Click Change advanced power settings

5.Navigate to Sleep and Hibernate after to set a specified time

6.Click Ok to enable your setting.All done,now your windows 7 will hibernate after the specified time
[...] On a laptop of windows 7, Hibernation is enabled by default to save power so that the battery can last longer,if you do not need this feature,please follow below steps to enable or disable hibernate in windows 7. [...]
very useful tutorial. thanks
It works ,hanks a bunch
I think we should keep this feature on and change adjust the hibernate after time will realize our purpose.
Thanks,
Rick
Thanks for the command line solution.