SmartSleep is a preference pane that dynamically sets the sleep state of your machine. It’s a successor to Hibernate.prefPane.

Just sleep means that the notebook will go to sleep fast, but you loose the ability to change the battery as the battery is needed to keep the contents of the memory (RAM).

Just sleep and hibernate will wake the computer fast, but sleeping will actually take ages as the contents of the memory will be saved to disk before entering the sleep.

SmartSleep lets your notebook just sleep while the battery has a high level. If the battery level drops below a certain point ( default is less then 20% or 20 minutes ) it will switch to sleep and hibernate. So you have the best of both worlds.

Requirements:

· Apple NoteBook