Zzz…Zzz…
In: Geek Finds
24 Apr 2007
Mac latops draw a very small amount of power while closed (aka “sleeping”) to preserve the contents of its memory. This small draw of power slowly drains the battery. If a Mac were to “hibernate,” like a lot of PC laptops can do, the memory would be saved to the hard disk and then draw no power at all. Apple doesn’t provide a “hibernate” option, so that’s where Deep Sleep comes in handy. Deep Sleep puts a Mac laptop into a hibernated state, writing the memory to the hard disk so that it draws no power while closed.
I tried Deep Sleep out this past weekend. On Friday, with a fully charged battery, I put my MacBook into “deep sleep” and went home. I didn’t open my computer until Sunday night, and when I did it still had a full charge! If I had just put it to sleep, I’m sure the battery would have been in the 70-80% range on Sunday.
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2 Responses to Zzz…Zzz…
Elph
April 24th, 2007 at 4:27 pm
Dude, 48 hours without opening your laptop!?
JoeG
May 13th, 2007 at 9:38 pm
Seems to be a bug in Deep Sleep: sometimes after coming out of Deep Sleep the keyboard is unresponsive. Billie had this happen to her the first time after installing, and I’ve had it happen to me twice now. It doesn’t seem effect a USB keyboard.