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Brand new 15" MBP, battery goes dead when sleep overnight

Aluminum213

Aluminum213

macrumors 68040
Original poster
Mar 16, 2012
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I've noticed a few times with this new laptop that if I end the day on 70-80% battery and put the laptop to sleep overnight, it's either completely dead or close to dead the next morning. The battery is fine when I actually use it though, it's just draining like mad when on sleep

This doesn't sound normal and I don't remember this ever happening with my old 2010 MBP
 
Normal battery drain in sleep mode should be around 1% per hour.

Something is either keeping your MBP awake or waking it up. Find out what.
 
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Simple solution:
Power it OFF at night -- all the way off.

The boot time on these is very fast...
 
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I suspect that your MBPro is not sleeping at all.
If you simply close the lid for sleeping, it's possible that the sleep sensor is faulty. Your MBPro would really be hot, if the lid is closed, but not sleeping.
Do you leave your MBPro connected to any external devices?
 
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DeltaMac said:
I suspect that your MBPro is not sleeping at all.
If you simply close the lid for sleeping, it's possible that the sleep sensor is faulty. Your MBPro would really be hot, if the lid is closed, but not sleeping.
Do you leave your MBPro connected to any external devices?
Click to expand...

How do I figure this out? Because when j first bought it wasn't doing this

I don't leave it connected to anything, I just close the cover and walk away.
 
Aluminum213 said:
How do I figure this out? Because when j first bought it wasn't doing this
I don't leave it connected to anything, I just close the cover and walk away.
Click to expand...
Try this:
The terminal command below will reveal what is waking up the Notebook;
cat /var/log/system.log | grep -i "wake reason"
 
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Aluminum213 said:
how do I input this command?
Click to expand...
Type it in your Terminal. Easier would be to copy/paste the exact text - which prevents typing errors.
That's assuming the command is correct. It doesn't actually output anything on my Mac.
But, "wake reason" is reported in the kernel.log, and not the system.log.
Might also be that I am using the command in a Lion system, so that may be the difference.
 
DeltaMac said:
Type it in your Terminal. Easier would be to copy/paste the exact text - which prevents typing errors.
That's assuming the command is correct. It doesn't actually output anything on my Mac.
But, "wake reason" is reported in the kernel.log, and not the system.log.
Might also be that I am using the command in a Lion system, so that may be the difference.
Click to expand...
I am using OS 10.10.5 and it works fine on my system. I did a quick test to verify before my initial post.
Here is a sample of what it shows for my system (all times and reasons for waking since the last start)
Code: 
XXXXX-MacBook-Pro:~ skull$ cat /var/log/system.log | grep -i "wake reason"
Oct 10 07:13:13 XXXXX-MacBook-Pro kernel[0]: Wake reason: XHC1
Oct 10 07:32:52 XXXXX-MacBook-Pro kernel[0]: AppleDeviceManagementHIDEventService::processWakeReason Wake reason: Host (0x01)
Oct 10 07:36:55 XXXXX-MacBook-Pro kernel[0]: Wake reason: XHC1
Oct 10 07:46:59 XXXXX-MacBook-Pro kernel[0]: AppleDeviceManagementHIDEventService::processWakeReason Wake reason: Host (0x01)/
Aluminum213 said:
how do I input this command?
Click to expand...
OP: Like DeltaMac said, the easiest input method is to copy and paste it in Terminal after it is launched.
 
Did one final test, charged MacBook to 100% last night, took it off charger and went to sleep

Woke up and it was at 14%, basically confirming it 100% wasn't sleeping
 
If your lid was closed all night, and still running, not sleeping, then your MacBook would be quite warm to the touch.
Sleeping, the case would always be completely cold, particularly after several hours.
 
DeltaMac said:
If your lid was closed all night, and still running, not sleeping, then your MacBook would be quite warm to the touch.
Sleeping, the case would always be completely cold, particularly after several hours.
Click to expand...


The macbook felt warm this morning when I picked it up, battery dropped from 100 to 14% overnight
 
Aluminum213 said:
The macbook felt warm this morning when I picked it up, battery dropped from 100 to 14% overnight
Click to expand...
Then it's most likely that it doesn't go to sleep. Do what I told you, when closing the lid, stay near the computer for a few seconds and wait and see if the fans actually stop spinning.

Oh, and, I recommend you turn off your computer every night instead of putting it to sleep. Just a suggestion.
 
Did you check "Energy Saver" options in "System Preferences"? Perhaps it wakes up because of a network access.

I would try an NVRAM reset by holding "cmd + P + R" while booting, until it reboots while the chime. The chime might be louder after the reboot if the volume was turned down before.

https://support.apple.com/en-us/HT204063

And resetting the system management controller (SMC) by holding on the left side of your keyboard "alt + ctrl + shift (the arrow above the fn key) + power button" while it is turned off and attached to power.
You should hold the keys for at least ten seconds or until you see that the color of the charging LED changes from green to orange and back. After that release all four keys and just push the power button to turn it on.

https://support.apple.com/en-us/HT201295


Edit: If you never power off your MacBook it could also help to just do this one time and turn it back on again or just reboot it. ;)
 
Last edited:
garirry said:
Then it's most likely that it doesn't go to sleep. Do what I told you, when closing the lid, stay near the computer for a few seconds and wait and see if the fans actually stop spinning.

Oh, and, I recommend you turn off your computer every night instead of putting it to sleep. Just a suggestion.
Click to expand...

The fan is still spinning when I close the lid, I'm definitely shutting this down every night till it's fixed

Erdbeertorte said:
Did you check "Energy Saver" options in "System Preferences"? Perhaps it wakes up because of a network access.

I would try an NVRAM reset by holding "cmd + P + R" while booting, until it reboots while the chime. The chime might be louder after the reboot if the volume was turned down before.

https://support.apple.com/en-us/HT204063

And resetting the system management controller (SMC) by holding on the left side of your keyboard "alt + ctrl + shift (the arrow above the fn key) + power button" while it is turned off and attached to power.
You should hold the keys for at least ten seconds or until you see that the color of the charging LED changes from green to orange and back. After that release all four keys and just push the power button to turn it on.

https://support.apple.com/en-us/HT201295


Edit: If you never power off your MacBook it could also help to just do this one time and turn it back on again or just reboot it. ;)
Click to expand...

did both
 
Aluminum213 said:
The fan is still spinning when I close the lid, I'm definitely shutting this down every night till it's fixed



did both
Click to expand...
Some apps actually prevent a computer from sleeping properly. What is usually open when you try and put your computer to sleep?

Also, why are you unplugging it overnight?
 
snaky69 said:
Some apps actually prevent a computer from sleeping properly. What is usually open when you try and put your computer to sleep?

Also, why are you unplugging it overnight?
Click to expand...

Right now I'm just using Apple apps like safari, iTunes, iMessage, nothing special


I'm unplugging it overnight because when the macbook is at 80% battery I don't see why I need to leave it charging all night
 
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