MBP 2018 model using 56% battery on stand-by overnight

[felixen]

Hi guys,

Around spring time I got an MBP Touchbar 2018 model. I love the computer and most of the time I just use it at home, so it's plugged in at my home office. However, these last few days I've had to bring it out of the house during the day. I've fully charged the Mac in the evening, unplugged it and packed my bag right before going to bed (battery at 100% when doing so), and in the morning the next day the battery is at 44%.

Is it really supposed to use that much battery just from being on standby?

 

[sebpettersson]

No, that's not normal at all. Look in Activity monitor if there is any app in the Prevent sleep column that says "Yes" (right click on the tabs and select that column if it isn't visible). You could also try to do an SMC reset.

 

[felixen]

No, that's not normal at all. Look in Activity monitor if there is any app in the Prevent sleep column that says "Yes" (right click on the tabs and select that column if it isn't visible). You could also try to do an SMC reset.

Thanks, I will check that out

 

[Fishrrman]

OP:

Try this for 2-3 days. It hurts nothing.

POWER OFF the MBP before bed.
Then open it in the morning and check the loss of charge.
What is it?

 

[Honza1]

Hi guys,

Around spring time I got an MBP Touchbar 2018 model. I love the computer and most of the time I just use it at home, so it's plugged in at my home office. However, these last few days I've had to bring it out of the house during the day. I've fully charged the Mac in the evening, unplugged it and packed my bag right before going to bed (battery at 100% when doing so), and in the morning the next day the battery is at 44%.

Is it really supposed to use that much battery just from being on standby?

Of course not, mine uses ~1% of battery overnight.

If none of the above suggestions helps, you may need to do some research manually. Power management is controlled by command line program pmset. Open Terminal and type in command line: man pmset and look for various options :
pmset -assertions will tell you what is preventing sleep and why.
pmset -g log displays a history of sleeps, wakes, and other power management events. This log is for admin & debugging purposes - very detailed and cryptic... But if you look in the morning, there should be log of who was waking system or preventing sleep.
there is lot more options to pmset. It gets bit tedious, but with some digging you should figure out what is causing the power drain.

If this is above your "paygrade", then try reinstalling system in place. Simply download full installer from App store and install over existing system. It should not change anything (but make backup first anyway!!), but if there is something which needs to be reset or fixed, installation will do it.

 

[felixen]

I took a look in the Activity monitor and sorted by "prevent sleep" and I found these 3. They seem to constantly switch between Yes and No in the "prevent sleep" column. Could they be what causes my Mac to lose so my battery, and if so, what should I do about them?

Thanks again! I really appreciate it

 

[Honza1]

I took a look in the Activity monitor and sorted by "prevent sleep" and I found these 3. They seem to constantly switch between Yes and No in the "prevent sleep" column. Could they be what causes my Mac to lose so my battery, and if so, what should I do about them?

Thanks again! I really appreciate it

Well,
these are deamons - applications which are suppose to run always and are restarted in they are killed (I think). Both relate to cloud or sharing of documents. Both on my system are mostly "not" blocking sleep.
I wonder if there is some problem with iCloud syncing and system is trying to sort this out. That would prevent system from sleep as it is working on this.
I would log out of iCloud on this computer and log back in. Make sure you have backup of your documents in iCloud before you do this as it is not clear what happens and which documents are going to be left after sync.
Google may provide more information on what to do, even Apple may have instructions.

 

[Fishrrman]

I'll charge my MacBook Pro up in the evening, it will read 100%, then I'll shut it down for the night.
When I power it back on the next day, the battery still measures... 100%.

There's a lesson to be learned here.

 

[felixen]

I'll charge my MacBook Pro up in the evening, it will read 100%, then I'll shut it down for the night.
When I power it back on the next day, the battery still measures... 100%.

There's a lesson to be learned here.

Well you're absolutely right, but it's not supposed to be necessary to power it off every night. That's not the intended design. With that said, doing so would of course solve my issue

 

[felixen]

Quick update, I had a Numbers sheet open all the time. I closed Numbers yesterday and left my Macbook unplugged, and it didn't use any battery over the night. Not sure if that was actually what caused it, but maybe Numbers kept this iCloud thing running in my Activity Monitor or something?

Edit: I take that back. Last night my unplugged MBP went from 100% to 0%. Yes, it was completely drained all the way down while in sleep mode