Battery Drain 12" Macbook when Sleep ??

[harleymhs]

Hey Guys, I googled this and tried everything... I have a 2015 Macbook 12" .. Battery is fine, hardly use this but when I do and close the lid to enter sleep mode the next day the battery drain has a 10 - 15 % drop.. turn it off and it is fine no battery loss.. Is there a way to find out what is draining the battery when in sleep mode.. Pain in the neck to keep turning it on and off when I need it... thanks in advance guys!!

 

[aangvento]

OP, are you sure it is going into sleep mode? Or you just expect it once you close the lid?

It is possible that the computer wakes up randomly, and if I am not wrong it is a Catalina bug in some models.

You can test that with a battery monitor app. I don't have any to recommend you but I am sure you can find one in the apple store. Something like android phones have: Show you the battery % over time and what's using it the most.

However, I would recommend you turn the computer off every time you go to bed, or plan to stay a while without using it. It helps keep your components fresh if you will. Lets all parts of your computer rest without not needed extra work. Sleep mode is supposed to be used when you need to turn it off after class and open it back on in the library, not when you go to bed. Turning off will fully reset the system, and that's important for the OS. Even if MacOS handles not turning off better, it does slow down a bit if you keep it on for too long.

But that's just a recommendation. it will not break your laptop to keep it on sleep mode.

 

[harleymhs]

Running Mojave ... And I am NOT sure when closing the lid puts it into sleep mode, I also tried clicking SLEEP MODE then closing the lid.. Still same issue.

 

[aangvento]

Well, we gotta run some tests then. Try downloading a battery monitor app and then share the results!
Even batteries turned off slowly lose charge. But it shouldn't lose charge this fast.

 

[mj_]

However, I would recommend you turn the computer off every time you go to bed, or plan to stay a while without using it. It helps keep your components fresh if you will. Lets all parts of your computer rest without not needed extra work. Sleep mode is supposed to be used when you need to turn it off after class and open it back on in the library, not when you go to bed. Turning off will fully reset the system, and that's important for the OS. Even if MacOS handles not turning off better, it does slow down a bit if you keep it on for too long.

🤣 Please tell me you're joking... Fresh? Rest? No extra work? What do you think your computer is made of, little humans? Sleep is sleep. All components save for your RAM are powered off. When hibernating even that gets shut off completely. Sleep is not made for short-term breaks but breaks of any length, be it a minute, day, or even year. And no, it is not important for the OS to "reset" itself every night. It's actually counterproductive to do so because it clears your RAM cache which then needs to be refilled from the abysmally slow permanent storage device. Contrary to popular belief it is not advisable to clear your caches on a regular basis because that will inevitably slow down your machine.

 

[mj_]

@harleymhs Do you happen to have Power Nap enabled? What is your sleep timeout set to? Your MacBook might be waking up during the night due to calenders notifications or reminders and not going back to sleep for a while.

 

[aangvento]

Your terribly slow extremally fast SSD, that takes seconds to boot, you mean?

Clearing the cache, clearing the ram and stopping the drain on the battery will make your computer last longer. It is an option because it will not break the computer if you don't do so, but it is healthy for the components.

If you are willing to go this low level, reducing the voltage on the board reduces the dust accumulation inside the case due to the magnetic field being cut off.

It is recommended but not necessary.

But I have to agree with his other point.

@harleymhsYour MacBook might be waking up during the night due to calenders notifications or reminders

It should not do that, but it is more common than you think. I haven't heard of many Mojave users complaining about broken sleep behaviour but it sounds like the most reasonable guess I can think of.

 

[harleymhs]

@harleymhs Do you happen to have Power Nap enabled? What is your sleep timeout set to? Your MacBook might be waking up during the night due to calenders notifications or reminders and not going back to sleep for a while.

Power Nap is DISABLED>.

 

[nameischarles]

This was exactly happening to my 2015 Macbook while on Mojave for some reason, close the lid and the next day it was 15-20% gone, I used this line in terminal:

sudo pmset -b tcpkeepalive 0

After that, it didn't drain the battery at all even after jumping on Catalina it's been stable.

 

[harleymhs]

This was exactly happening to my 2015 Macbook while on Mojave for some reason, close the lid and the next day it was 15-20% gone, I used this line in terminal:

sudo pmset -b tcpkeepalive 0

After that, it didn't drain the battery at all even after jumping on Catalina it's been stable.

thanks Ill try that...

 

[mj_]

There's a reason why tcpkeepalive is enabled by default. Disabling it will inevitable break "Find my Mac" so keep that in mind.

 

[nameischarles]

There's a reason why tcpkeepalive is enabled by default. Disabling it will inevitable break "Find my Mac" so keep that in mind.

of course, you can reverse this by typing:

sudo pmset -b tcpkeepalive 1