Hibernate and Sleep, what's the difference?

I used to be confused but I understand it by now. The key is : hibernate still needs power but sleep doesn't.

Sleep and Hibernation are both power-saving state of computers usually used when the user temporarily does not use the computer. However, hibernation is designed for laptops. Here's the techie explanation: Sleep quickly resumes all operation at full power once the computer is going to be used again. This usually only takes seconds. This process is similar to when you are watching tapes/CD/DVD movies that you pause for a while then resumes when you want to continue. Hibernation is similar to sleep but the process is this: Hibernation puts all open files and programs you have on your hard disk and then turns of the computer. This user lesser power compared to sleep. Therefore: Sleep mode means that you only want the laptop to be temporarily "off" only for a few hours. While Hibernation is if you cannot use your laptop for a long period of time--If you wish to still resume your work afterwards and that you don't have the chance to charge your laptop with power anytime soon. Hope this helps! For more info you can just refer here: http://windows.microsoft.com/en-us/windows7/Sleep-and-hibernation-frequently-asked-questions The link above is not a referral link.

I am not teki as well. My daughter said that that is literal. Sleep means a few hours, hibernate is like a bear's. LOL. I hope I helped. Let's wait for the sound responses. Sigh.

When you put your laptop in sleep mode laptop is still in running mode only display is off and your all program going to be closed.So after couples of hours your battery of laptop will go down But, when you put your laptop in hibernet mode then at that time your computer will going off and your all program state will be saved on harddisk and it will not consume battery.