If you have a Powerbook or iBook then you are probably more familiar with the ‘sleep’ function, a low energy mode that acts as an alternative to powering down. Well it just got better for new Powerbook owners. The new Powerbooks sport a feature found on many PC laptops called Hibernate. Hibernate, known as Safe Sleep on the Powerbooks, saves your current progress and actually powers off entirely, thus saving your precious mobile power. When you start back up you are where you left off, including the amount of battery life left. Although this feature is supposed to be Powerbook only, Andrew Escobar has found a hack to do it to any Apple.
Story via Daypop