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2011 MacBook Pro: Surprised at how much the battery drains in sleep

J

Jeff5i

macrumors 6502
Original poster
May 4, 2005
482
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I have a brand new 13" i5 2011 MacBook pro. In two separate tests i've charged it to full unplugged the ac adapter and shut the lid. After 48 hours I open the lid and see 40% remaining. I know there are apps like smartsleep or deepsleep that can force a hibernate instead of sleep to ram, but seriously apple this is 2011.

Anyone else notice this?
 
jeff_siler said:
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I have a brand new 13" i5 2011 MacBook pro. In two separate tests i've charged it to full unplugged the ac adapter and shut the lid. After 48 hours I open the lid and see 40% remaining. I know there are apps like smartsleep or deepsleep that can force a hibernate instead of sleep to ram, but seriously apple this is 2011.

Anyone else notice this?
Click to expand...

In what realistic scenario would you leave a laptop in sleep for 48 hours?

Anyway I don't know if that's normal since I don't have a MBP yet, plan to soon.
 
mike2732 said:
In what realistic scenario would you leave a laptop in sleep for 48 hours?

Anyway I don't know if that's normal since I don't have a MBP yet, plan to soon.
Click to expand...

Good point, although doesn't really help us here ;)

I wouldn't know either, but having come from a 13" MBP, for periods in which i did leave it on standby for, not as long as 48 hours, but maybe overnight, the battery would go from 100-93%. Dropping to 40% might seem excessive but it probably is not.

Remember power has to be given to the ram in order to keep the contents of the drive intact. With smartsleep you can force hibernation, but outside of that I don't know much about it.
 
Ok I'm glad it is not a hardware issue just a usability workflow. I'll make sure to shut it down before placing in my bag.
 
So base on your figure

100% battery can be used

Sleep: 80 hours
Use: 7-8 hours

I think sleeping consumes 1/10 the juice it does on normal usage is fair don't you think?

I never power off the my 2010 MBP unless I have to. When I finish working, I just close it right down, put it right into my bag (thanks to disabling safe sleep, the hard drive stop spinning the second I close the lid), then when I need to work, I just open it up and get right to work. Just love it.
 
huythanhv2 said:
So base on your figure

100% battery can be used

Sleep: 80 hours
Use: 7-8 hours

I think sleeping consumes 1/10 the juice it does on normal usage is fair don't you think?
Click to expand...

No freaking way. It should consume more like 1% at most as all it needs is a trickle of juice to keep the ram hot and detect wakeup conditions.

I think a recent OS upgrade may be making this worse again. I am on 10.6.7 running on a 11 inch MB Air. Of late from 7pm when it goes into the bag to about 10 am the next day drains the battery to about 8% left. That is crazy making.
 
I routinely do this with my 2011 2.3 i7, just as I did with my 2008 2.4 C2D. I would close the MBP on Friday afternoon after work and sometimes never touch it again until Monday morning for work again. I have never had mine dead and the worst I have seen is around 40-50% on Monday morning (depending on how much I left open when I shut the cover, shouldn't make much or a difference but for some reason it did, drained more with VMware left open). On the flip side, I have seen it be as high as 93% remaining when I opened it on Monday. I never shut my computer down unless a restart is required. Some will say it isn't good for it, but I have operated this way for years and will continue to for more to come. The sleep ability and battery retention is exactly why I purchased a MBP in the first place. For me it is a tool and I use it as such.
 
If you're going to not use it for 48 hours then shut it down... Simple.. Man you people complain about the dumbest things.
 
-Ken- said:
I'd never let a computer sleep that long, not an issue IMO.
Click to expand...

When I travel (motorcycle camping) my MBA often sleeps for 2 or 3 days, and has for as much as 4, with plenty of juice left when I needed it. :D

It isn't an issue when you accept the fact that in your case either you can't or you don't want it to ;). It's the primary reason I went the MBAir route .....
 
TPadden said:
When I travel (motorcycle camping) my MBA often sleeps for 2 or 3 days, and has for as much as 4, with plenty of juice left when I needed it. :D

It isn't an issue when you accept the fact that in your case either you can't or you don't want it to ;). It's the primary reason I went the MBAir route .....
Click to expand...

With a MBA, you could also boot it up in mere seconds ... Damn MBA optimized SSD
 
I often leave my work laptop asleep in the bag for the entire weekend. Sometimes up to 72hrs

I would expect at least a week of battery life out of sleep (not hibernate) - that's what my 4 year old thinkpad could do.
 
GGJ posted something somewhere that said your battery should lose exactly 1% per hour that its in sleep.

And are you closing all of your apps while you do this? or at least the big ones?
 
iMackPro said:
GGJ posted something somewhere that said your battery should lose exactly 1% per hour that its in sleep.
Click to expand...
It's not exact, but approximate. The statement by Apple is included in the Apple Notebook Battery FAQ
Sleep drain: You may notice the battery in your Apple portable may drain up to 1% per hour (24% per day) while the computer is in sleep mode. This is normal behavior.
Click to expand...
 
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