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My MBP was in sleep mode for over a week :-O

L

LincolnsiPod

macrumors 6502a
Original poster
Nov 20, 2009
665
98
I was making some updates to my MacBook, then shut it down for the weekend, or so I thought. After a busy week I was finally able to get back to using it again, but I noticed it wouldn't power up. When I plugged in the charger and hit the power button again the screen instantly came up, with my browser still open. I never shut it off and it had been asleep this whole time. :eek:

Is the battery going to be ok? I'm charging it now and it seems ok but that about gave me a heart attack. Eeesh.
 
Thanks, got that bookmarked in case I run into issues. My MBP was literally in sleep mode for 12 days. When I turned it back on battery life was at 5% then dripped to zero after a few minutes.

For the life of me I never knew sleep mode could last that long. :eek: Agreed about calibrating, I read up on battery maintenance and will follow a schedule to calibrate it every three weeks from now on. :D
 
Sleep mode lasts as long as your battery can supply the RAM with power, so pretty long. Not sure why you needed to plug in the power cord for it wake though.
 
grahamnp said:
Sleep mode lasts as long as your battery can supply the RAM with power, so pretty long. Not sure why you needed to plug in the power cord for it wake though.
Click to expand...

Because the battery was almost out.

The computer sleeps before the battery runs out so it has time to save your RAM to the HD. This means that if it sleeps for too long, and the battery completely runs out, the computer effectively reverts to hibernation. When you plug it in, it will wake up, realise there's no information in RAM, and so re-fill RAM with the data it copied to the HD.

If the computer has almost no battery left and is asleep, it knows there is no point in waking up. So it won't.

Worst case scenario, you added a single charge cycle to your battery.
 
Green light came on and the battery life seems as usual. Thanks for the responses all. :D
 
LincolnsiPod said:
Is the battery going to be ok? I'm charging it now and it seems ok but that about gave me a heart attack. Eeesh.
Click to expand...
Your MB will use approximately 1% of battery power for every hour in sleep mode. It doesn't harm your battery at all to let it sleep for long periods or even let it run completely out.

This should answer most, if not all, of your battery questions:
 
I'm more amazed that you were able to NOT use your macbook for a week! I think my max has been ~48hrs? Nearly killed me ;)
 
Thanks again, I'll be sure to re-calibrate once a month from now on. It's still new so I'm good. :D

I'm more amazed that you were able to NOT use your macbook for a week!
Click to expand...

I know right? Especially since I have the Mac Store installed which alone would guarantee I never see the light of day again, but I've just been too crazy busy with work. :eek:
 
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