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Battery Health of 13" MBP 2020 model.

K

kodabear

macrumors regular
Original poster
Sep 5, 2020
104
49
I have read several posts from people who have had concerns with their laptops and battery health so I thought I would share this info regarding my Apple devices. As a comparison, my 13" MBP purchased in September has a battery health of 90% as compared to my daughters late model 2013 MBP 13" that she bought from me has a battery health reading of 82% and it's 7 years old. I have also included as a comparison the battery health of my iPhone XR and iPad Mini 5 that are approximately 2 years old.
These numbers just don't seem right but I will hold off getting concerned unless my battery health drops below 80% in another 3-4 months which based on the current rate that could easily happen.
 

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kodabear said:
Original design capacity on the Coconut battery shows 5088 mAh
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coconut battery has been misreading battery levels for years. Also with battery management the reported capacity is purposely reduced to promote longer battery lifetime before needing replacing.
 
AppleFeller said:
coconut battery has been misreading battery levels for years. Also with battery management the reported capacity is purposely reduced to promote longer battery lifetime before needing replacing.
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Then Coconut Battery as well as others have been misreading battery health as I have used another app that reported battery health at the same percentage. Can you explain my daughters 7 year old MBP 13” still at a healthy 82%?
 
kodabear said:
Then Coconut Battery as well as others have been misreading battery health as I have used another app that reported battery health at the same percentage. Can you explain my daughters 7 year old MBP 13” still at a healthy 82%?
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Thats correct its why you should reference the system itself for battery health information and not third party tools. No I cannot tell you why your daughters battery is at 82% as charging, usage, and environmental factors all go into how a battery degrades.
 
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kodabear said:
my daughters late model 2013 MBP 13" that she bought from me has a battery health reading of 82% and it's 7 years old
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This is possible and within bounds. Those batteries are rated for 1000 cycles and keep 80% health/capacity.

kodabear said:
my 13" MBP purchased in September has a battery health of 90%
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This is the outlier. Something is not right. I would get it back to Apple to diagnose.

And open a support ticket; as a record to facilitate future replacement when it drops of a cliff below 80% health before 1000 cycles.
 
I bought my MBP16 last Dec which came with a perfect condition battery reading close to 100% after 10 months.

One day the speaker has gone malfunctioned and Apple had the topcase replaced for free covered by warranty. Unfortunately this new topcase did not come with a battery as good as previous one, as you can see it started off 98% and massively dropped to 94% on the week (15th Dec) I upped to Big Sur 11.1

p.s. I wonder if finest battery starts with 1 cycle whilst less fine battery has more cycle, in my case 3 cycles
 

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I'm pretty sure coconut battery just uses the system stats for reporting battery health. Also, if you disable the battery health feature and give it a few days it will climb back up to where it should be.
 
Jmgilliam18 said:
I just see full charge capacity which i assume is now - i don't see where it says original capacity so you can see what % you are at now.
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No full charge capacity is just that, the capacity of the battery on a full charge. It’s not the current battery life/level
 
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