Battery Discharge During Sleep

Is it normal to lose 4% each night when the computer sleeps? When it was new, it did not lose anything.

You have indicated that you do not keep your MacBook plugged in overnight. The reason you are losing about 4% when you put your MacBook to sleep is because it uses power while in sleep. Granted, it is a fairly small amount of power... just enough to keep the contents of your RAM so when you wake it, it will not have to boot up again. When you shut down your MacBook, it is not using any power and therefore that is the reason you don't see any change. I'm not sure what you mean when you say this didn't happen when it was new. When it's sleeping, it uses power, it's as simple as that... it's impossible for the power not to drop a few % overnight if it is not plugged in.

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Battery drained during sleep

My new 13'' MBA seems to use quite some battery power during sleep -much more than I experienced with my 15''MBP.
I am used to never shutting down my Macbooks, but simply close the lid to put it to sleep. Usually, I find the battery to be less than I left, but today I found the battery to be fully drained.
Am I missing something with the power settings? Doesn't the 30 day stand by time refer to "shutting down the lid" and preserving battery life for days?

Hi
Have you applied the Firmware update? If so, try resetting the PRAM.
http://support.apple.com/kb/ht1379
Adam

Encore WT8 - battery discharging during the sleeping mode

My battery is discharging during the sleeping mode.
If I sleep the tablet with battery fully charged then battery is fully discharged after 14h.
I suppose that must be something wrong with it. I cant find any option to activate functionality to switch off (hibernate) tablet when it is not used in sleeping mode for particular time.
Do you have any solution or advice what I should do to change energy consumption during the sleeping mode?

Hi
The system supports connected stand by function which starts working after your tablet goes into sleep mode.
Connected standby function is to provide a constant connectivity while delivering long battery life and at the same time some activities are allowed to run to ensure that the supported connected standby scenarios (for example receiving emails, updating tiles alive with fresh content, downloading/uploading a file from a/to a website and playing music) are functioning properly.
What does this mean?
This means that even if the tablet is set into Sleep Mode, some background processes are still running and this could be the reason why the battery discharges.

MB Battery drain during sleep

I have a MacBook IntelDuo (not 2) that I just purchased in October.
I noticed that the battery still drains during sleep. If I put the computer to sleep for 4 hours, it drops by about 15% - 20%.
I had a iBook (white g3 500mhz) and I could put it to sleep for days without the battery barely draining at all.... espeically in OS9 (over a week unplugged and asleep and had 25% battery left). Once I switched to OSX the battery drained a bit faster.
Drain is expected, but this seems like a much bigger drain than older systems. What could still be running when it's asleep?

When you put it to sleep, do you notice a steady white light? If so, then only your display is sleeping.
You can change sleep settings in System Preferences > Energy Saver.
Your battery will drain if only your display is sleeping. Your computer is still on if you see the light.

Battery drains during sleep!

My almost 2 year old battery for my 15" PB G4 keeps losing its' charge when sleeping. After fully charging, I put it to sleep by closing the lid (and confirming the flashing LED).
A few hours later when on the train, it won't wake up, until I get home and plug it in, only to realize that the battery had drained.
Here's my coconut:
Current battery charge 1168
Max battery charge 3089
Current battery cap 3089 (70%)
Original battery cap 4400
cycles 191
age 22 mo
Any suggestions? Do I need a new battery?
Thanks.
PB 1.67 15 Superdrive Mac OS X (10.4.6)

I realize this is an older thread, but I was searching around the forum on this topic because I've been finding that one of my PowerBook batteries has been draining quickly during sleep (on planes, not trains!). I thought you might find my situation similar and informative.
On a more recent thread, I found a couple of suggestions that have led me to believe that my "problem battery" is just plain old. I've looked at the battery info in the System Profiler (under Hardware > Power), and confirmed that fully charged, my battery's capacity is a meager 877 mAh (19% of the original 4400) and it's been through 169 cycles. It's a battery I bought with the PowerBook, so it's over two years old.
Considering the massive drop in capacity, I think it's time for a new battery...

Battery Drainage During Sleep

I saw a few posts on this issue but haven't seen anything in a while. My battery drains too quickly during sleep mode. Has apple addressed this yet. If not has anyone found a fix for it. It's really the only thing that has bugged me about this new laptop.
Any help would be appreciated.
Cheers

No official fix for now.
You have to manage the sleep yourself! If it's a short sleep, just close the lid as usual and forget your 2% comsumption. If it's a long sleep (a hibernation), use something like deepsleep (http://deepsleep.free.fr/) and be patient during the wake up.
Yet a little effort and apple will be as worst as linux to manage power...

Severe battery loss during sleep mode

I have a brand new MBAir and I'm trully intrigued about the loss of batery happening during sleep mode. I've fully charged it on Friday, and, since then it's been on sleep mode. Today, finally turnign it on this night to work a bit, I found it has only 73% of charge! What can be happening? IMPORTANT: My "power nap" mode is OFF since I've bought it and started using and noticing this down charge. Can anyone help me?

I've just solved it all when I noticed I kept plugged in my wireless mouse receptor. Just plug it out before leaving the MBA in sleep mode, and the problem was solved.

Battery Drain During Sleep

100% battery life when I unplugged my laptop and brought it to work this morning. 5 hours later I pull it out of my backpack and I have 88% battery life. Why?? Reading on here about hard drives not sleeping. Is that the problem?
I've never been thrilled with the battery life (it's a 10/2008 MBP 15") Two weekends ago I didn't use it at all or plug it in. When I opened it, it had put itself in that save/sleep state where it had to "restore" where i last was. In the grayed out screen I could see 78% battery which would have been what it was the last time I had it open. So really? not even opening it for two or three days and it will use up 78% of the battery??
Right now? 78% battery says I'll get 1:55 minutes. sighh

look - I've owned 5 mac laptops from a 540c to my current 2.83Ghz Uni MBP.
NONE of them had this issue - EXCEPT this one.
I could put any of my other machines to sleep with 90% battery and wake them up 2 days later and find them with 86%... this one - if I leave it sleeping overnight with no plug attached, it is DEAD in the morning.
is this going to be just another one of those problems which Apple pretends doesn't exist?
I already had the hinges on my TiBook fall apart and the ATI card on my last MBP (2.16 17") go completely dead... now this - admittedly less serious but still very annoying issue.
I'm waiting for a solution Apple...
but I'm not holding my breath.
-bennett

Does battery drain during sleep mode?

I've had my MacBook Pro now only about a week. Just wondering about when not using...if its best to completely power off (though then it may get turned on...turned off once or twice later throughout the day) ...or leave the power adaptor on it and put the laptop in sleep mode? Or...what happens when in sleep mode and say the power adaptor is not attached. Does the computer drain the battery much while in sleepmode?
thanks...

It's fine to leave it plugged in for normal use. That's what I do, and I suspect many people do as well.
Having said that, Apple does recommend using the battery occasionally:
http://www.apple.com/batteries/notebooks.html
charlie

MBP A1278 Battery Drain during sleep

So I've been having issues with my Mid 2010 MBP A1278. I always charge it to 100%, but quickly overnight it drains and in a couple days goes to zero without using it at all. Does anyone have any tips? Right now I'm using OS X 10.8.5, but upgading to Mavericks in the next day or two. Below is the notes I made about when I opened and closed the laptops with battery percentages. Is this normal?
8:12 PM 99% Wednesday
Then closed lid
7:04 AM 88% Thursday Morning - checked battery for 1 minute
Then closed lid
9:40 PM 50% Friday Night - checked battery for 1 minute
Then closed lid
7:46 AM 40% Saturday Morning - started working with WiFi connectivity
8:19 AM 29% Saturday Morning
then closed lid

Not much. Mine goes down maybe 1-2% overnight, if anything.

Battery drains while sleeping after RAM upgrade

Installed 16 GB of RAM and a Hybrid/SSD 1 TB internal HD on MacBook Pro 15" mid 2012 and now the battery drains while the computer is in sleep mode, about 1-3 % per hour. Before the RAM upgrade (stock 4 GB of RAM) there was no noticeable battery drain, so I assume it has to do with the upgrade. I read that it takes more power to maintain 16 GB of RAM during sleep, so my questions are as follows:
Is 1-3% per hour normal?
Will resetting the SMC help the issue?
Does the Hybrid HD have anything to do with this?
I am not too happy about the battery drain as it happens that I don't use my laptop for some time and prior to the upgrade the loss of battery charge was not an issue at all. Is this the price I have to pay for maxing out my RAM or is there a way (resets, settings, etc) to reduce the amount of battery loss
Thanks for your input.

Hi everybody. I have the same question. I have a macbook unibody late 2008. I have recently upgraded the OS to Yosemite. In order to have a smoother functioning of the system I have immediately replaced my original 2Gb (1+1) RAM with 8 Gb (4+4). Since then, I have noticed a dramatic reduction of my battery charge during sleep mode. Now after 8 hours of sleep it goes from 100% to around 65% (before it was 95%). Is it a natural consequence of having installed a larger RAM or there could be anything wrong with my settings?
I have read a couple of articles about standby mode and standbydelay setting but this does not apply to my model of macbook.
Here is my pmset -g result:
Active Profiles:
Battery Power        -1*
AC Power        -1
Currently in use:
hibernatemode        3
acwake               0
lidwake              1
halfdim              1
sleep                20 (sleep prevented by AddressBookSour)
ttyskeepawake        1
sms                  1
hibernatefile        /var/vm/sleepimage
disksleep            10
displaysleep         2
Thanks a lot for any comment / suggestion /hint.
Bye

Battery Depletion While Sleeping...can we make it better?

I was thinking, but have not had time/resources to do any benchmarking.
If these laptops use battery juice while sleeping to preserve the contents of RAM....Would freeing up RAM (quitting applications, flushing cache to disk etc) make an difference on battery lost during sleep?

bernuli wrote:
I was thinking, but have not had time/resources to do any benchmarking.
If these laptops use battery juice while sleeping to preserve the contents of RAM....Would freeing up RAM (quitting applications, flushing cache to disk etc) make an difference on battery lost during sleep?
No. You can't preserve just part of RAM.

Normal battery discharge patterns on my MBP

Would it be normal for a fully charged unplugged macbook in sleep mode with no disc in a dvd drive and no fan running, generally totally silent computer to lose a quarter of its charge after 15 hours? I put it to sleep at 3:30 yesterday with 100% charge and opened it at 8:30 this AM to find 76%. I have never felt that the power worked well on this computer. Battery behavior has persisted despite the battery being replaced and even a new hard drive put in and clean installed.
Is the battery just not that good on MBPs?

Hi, Ben. The rate of battery drain during sleep has been an issue ever since the release of the unibody MBPs. I don't know whether the same was true before, with the pre-unibody MBPs; I never had one of those or frequented the forums that are devoted to them. But the unibody MBPs drain their batteries more than an order of magnitude faster while sleeping than the Powerbooks I was used to before getting my MBP.
There was a very, very long thread on this subject here about a year ago, after the first unibodies had been out for several months. The slowest rate of drain during sleep that anyone reported in that thread was about 1% per hour. The majority were in the 1.5-2% range, and a few people reported their batteries draining 3-4% per hour during sleep — quite appalling. There has been no change or improvement that I'm aware of since then.
There is, however, an effective workaround. Two, actually: the first, simplest and most obvious is to leave the machine plugged into AC power while it sleeps whenever possible. The second is to instruct the machine to hibernate instead of sleeping whenever you can't plug it in. For that you need either a Terminal command sequence that I can't recall, or third-party help in the form of Hibernate. There is also the more elegant Deep Sleep widget, but it's not compatible with Snow Leopard yet (and six months after Snow Leopard's release, one suspects it may never be).

Removing battery during sleep?

Is it safe to remove the battery during sleep to replace it with a spare? I know that the computer will shut off, but shouldn't it just start back up again since it copies all the data to the hard drive?
I was thinking of purchasing a second battery, but it would be annoying to have to shut down and reboot to replace it.

I would not recomend that, since the sleep is not
totally shut down and some task still work and on.
the only <<task>> is to provide some power to save ram content...
be gentle to your macbook and do it by the rule and
keep your macbook happy and healty.
<<safe sleep>> makes I guess the swapping of the battery while sleeping part of the rule...
This is a good reading regarding safe sleep :
http://andrewescobar.com/archive/2005/11/11/how-to-safe-sleep-your-mac/
shut it down completely, it only take 2 minutes to
shut it down before you can change the battery.
If that was necessary, I do think like the original poster that owning a second battery is not worth it...
phjo

MBA 2013 battery drain quickly during sleep after updated to mavericks

Hi,
After I updated to mavericks this Tuesday, I noticed the battery drains quickly during sleep mode.
Before the system update, everything was ok. Each night after I closed the lid, it went to sleep and the battery only droped less than 5% after sleep of the whole night.
But during the last two nights after system update, it drained more than 50% of the battery during 8-hour sleep. I could feel some heat on its back when I picked it up. I did not change any system setting or installed any new apps.
my MBA: latest 2013 version, 13 inch, haswell i7, 8G ram, 256 SSD.
I liked my mba so much because of the long battery life. But now It was really annoying because I have to charge it very often.
Any ideas how to solve this issue?

Hi Hans,
There's another thread going with the same issue as you... check:
MBA mid-2013 wakes from sleep every minute on Mavericks
I still haven't seen a resolution anywhere... smacks of something on Apple's side with so many users complaning

Battery Discharge During Sleep

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