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sat24

macrumors regular
Original poster
Sep 2, 2019
222
141
coconutBattery history attached. Seems like a steep drop to me...

Should I be concerned? Thanks.
 

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jeyf

macrumors 68020
Jan 20, 2009
2,173
1,035
sorry about your situation

you might try a few resets and see if you can get 100%
usually apple has a few super secret low level resets, do those too

depending on the battery technology you might want to let the computer significantly discharge the battery
there is a battery life remaining# = ??

this is a new MBP so YES i would be worried
 
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Honza1

macrumors 6502a
Nov 30, 2013
704
281
US
Ignore it. On my MBP 2017, just during the last about month, the reported capacity varied randomly between 97 and 100% - while I went through battery cycles 34-43. Today happens to be 98%. And I started - when new - with capacity above 100% (like 102-103%). These reported capacities are best guess calculations and variation by few % is normal.
Usually, the capacity drops somehow early (and this is early), stabilizes and eventually drops at the end of life.
 
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jeyf

macrumors 68020
Jan 20, 2009
2,173
1,035
the OP can do what ever
i have a 2017 MBP and its always 100%
 
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thuanlt692

macrumors newbie
Mar 23, 2020
1
0
sorry it's not relate to MBP 16".
But my MBP 15" 2019 have the same issue.
Any body know the value of Design Capacity and Full Charge Capacity?
Thanks
 
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sat24

macrumors regular
Original poster
Sep 2, 2019
222
141
sorry about your situation

you might try a few resets and see if you can get 100%
usually apple has a few super secret low level resets, do those too

depending on the battery technology you might want to let the computer significantly discharge the battery
there is a battery life remaining# = ??

this is a new MBP so YES i would be worried
I am going to do a full discharge this weekend and then a full charge + 2hrs on power and recheck.
 
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khalitzy

macrumors regular
May 21, 2016
141
22
how’s it now? I have the same issue on my 16” except that it’s never stayed at 99% like yours did, it was 99% out of the box then dropped to around 95% at 36 cycles
 
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jeyf

macrumors 68020
Jan 20, 2009
2,173
1,035
i would do the super secret apple resets as well
good luck
 
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Honza1

macrumors 6502a
Nov 30, 2013
704
281
US
You do realize, that all what various rests and discharge cycles do is fixing the way MBP reads the battery (calibration) and not fixing/improving battery life? It is important to have good read of battery so computer does not shut down early, but you are not fixing the battery capacity. Just the read out on the screen...

Battery cannot improve, it degrades with use. Improvement would be against the laws of chemistry of current batteries ;-)
(well, not completely true, early cycle or two can "form" the battery and do have impact on battery life, but these should be done in factory).

Few years ago I had battery, which showed 100% charged and quite high capacity and when discharged to ~30%, died. Calibration was lying, the reality was 70% battery capacity in real life, at most.
 
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jeyf

macrumors 68020
Jan 20, 2009
2,173
1,035
no need for a civics lesson on how the interWeb works, right?
4example:
i bought a 2017 butterfly MBP in late 2016. It was all about "how i held the keyboard" till Apple lost the class action law suite. Apple did free warranty repair but replaced the existing kb with the same failed design.

good luck
 
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sat24

macrumors regular
Original poster
Sep 2, 2019
222
141
I did the full battery reset (let it run to 0%, wait 2 hrs, recharge to full, wait 5hrs with no use). Still was stuck at 95%. And then it dropped to 93%! wtf.

Then it bounced back to 96.5%. All within the same 37 charge cycle. I am not sure what is going on... can someone shed some light on this?

Screen Shot 2020-04-12 at 3.05.09 PM.png
 
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Steve686

macrumors 68040
Nov 13, 2007
3,579
1,520
US>FL>Miami/Dade>Sunny Isles Beach>Condo
I did the full battery reset (let it run to 0%, wait 2 hrs, recharge to full, wait 5hrs with no use). Still was stuck at 95%. And then it dropped to 93%! wtf.

Then it bounced back to 96.5%. All within the same 37 charge cycle. I am not sure what is going on... can someone shed some light on this?

View attachment 905469

Seeing as your capacity has not fluctuated below basically an Apple Watch 5 battery after 37 cycles, I wouldn't be too concerned.

Not saying it is normal, but your battery seems to have stabilized where it isn't going to die anytime soon.
 
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khalitzy

macrumors regular
May 21, 2016
141
22
Seeing as your capacity has not fluctuated below basically an Apple Watch 5 battery after 37 cycles, I wouldn't be too concerned.

Not saying it is normal, but your battery seems to have stabilized where it isn't going to die anytime soon.
why do you examplify the Watch as a standard?
 
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russell_314

macrumors 68020
Feb 10, 2019
2,354
2,985
USA
This is why Apple does not list these figures in the OS because people panic. I would suspect that it's just the normal breaking in of the battery or some type of error in how the app calculates the percentage. You're probably putting more wear on the battery by discharging and recharging it trying to figure out why it's 97% and not 100% 😪

You have at least a one year warranty and hopefully AppleCare so if it goes down below a usable level take it in for repair.
 
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Arizor

macrumors member
Aug 24, 2012
61
11

Can we just get this stickied? Every day or so a new "MY BATTERY" thread pops up. It's just the battery management at work. You'll find the "Health" varies between 93-100% depending on various things.

Focus on real world performance. If your computer is only lasting 5 hours on a full charge just browsing and answering email, then worry. Otherwise it's just a number on the screen you shouldn't fret over.
 
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