MacBook gets hot and battery drains when sleeping (lid closed)

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Level 1

12 points

MacBook gets hot and battery drains when sleeping (lid closed)

Hi,

My MacBook gets hot and its battery drains whenever it is on sleep mode (lid closed). I notice this mostly when traveling and taking it out of the bag - it is usually very hot and loses tens of battery percentage (depends on the time it was left in sleeping mode - usually no more than few hours).

How can I find the origin of the problem? (I do not believe this is a hardware issue)

PS, I used EtreCheckPro to look for any hardware/software issues but there were none...

Mac specifications:

Model Name: MacBook Pro

Model Identifier: MacBookPro16,2

Processor Name: Quad-Core Intel Core i7

Processor Speed: 2.3 GHz

Number of Processors: 1

Total Number of Cores: 4

L2 Cache (per Core): 512 KB

L3 Cache: 8 MB

Hyper-Threading Technology: Enabled

Memory: 32 GB

System Firmware Version: 1554.120.19.0.0 (iBridge: 18.16.14663.0.0,0)

Serial Number (system): C02DD12MML86

Hardware UUID: D6D12599-45FB-5BF6-A32C-0B65F319ECD2

Provisioning UDID: D6D12599-45FB-5BF6-A32C-0B65F319ECD2

Activation Lock Status: Enabled

MacBook Pro 13″, macOS 11.4

Posted on Jul 3, 2021 4:50 AM

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Answer 1

Top-ranking reply

tala3141 Author

Level 1

12 points

Jul 3, 2021 7:10 AM in response to dominic23

Thank you for the swift reply.

However, neither of the answers tackles the problem I described:

My Mac is relatively new, this is no battery issue, and when I normally work on my Mac (plugged or unplugged) I do not have this overheating issue. I believe that some app prevents my Mac from going into Sleep Mode, which results in heating up when the lid is closed (let alone if the Mac is in my bag).
I don't see how starting up in Safe Mode can solve such problem. I will give it a go, and also the First Aid, but I am skeptic...
Again, the battery draining is probably related to the Mac heating up - it doesn't 'really' go into Sleep Mode. So battery management doesn't seem to have anything to do with the problem.

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Answer 2

dominic23

Level 10

83,952 points

Jul 3, 2021 6:47 AM in response to tala3141

1. Section: Tips for MacBooks

https://www.apple.com/uk/batteries/maximizing-performance/

2. Startup in Safe Mode. https://support.apple.com/guide/mac-help/start-up-your-mac-in-safe-mode-mh21245/mac.

Quote:

It also does a basic check of your startup disk, similar to using First Aid in Disk Utility.

And it deletes some system caches, including font caches and

the kernel cache, which are automatically created again as needed.

3. Battery Management.

How battery health management helps

The battery health management feature in macOS 10.15.5 is designed to improve your battery's lifespan

by reducing the rate at which it chemically ages.

The feature does this by monitoring your battery's temperature history and its charging patterns.

Based on the measurements that it collects, battery health management

may reduce your battery's maximum charge when in this mode.

This happens as needed to ensure that your battery charges to a level that's optimized for your usage

—reducing wear on the battery, and slowing its chemical aging.

Battery health management also uses the measurements to calculate when your battery needs service.

https://support.apple.com/en-us/HT211094?cid=mc-ols-energy_saver-article_ht211094-macos_ui-04022020

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MacBook gets hot and battery drains when sleeping (lid closed)

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