Well the thing is coconut battery simply just fetches the data from macOS itself it doesn’t make up the data. You can check the date yourself by going to settings then power.
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I'm pretty disappointed with the MBP 16" battery health situation.
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Well the thing is coconut battery simply just fetches the data from macOS itself it doesn’t make up the data. You can check the date yourself by going to settings then power.
Indeed. There some “joojoo ” used that the latter and current generation devices were not reporting published figures on Samsung devices. This occurred after Samsung marketed their devices as being able to keep their battery health capacity for longer than before.
Quick follow up, mine is now 91% after only 3 months. I know that I should not worry about it, but it keeps bothering my OCD.
The design capacity is a nominal capacity, expect a few % difference from unit to unit
In addition there is the measurement accuracy:
Coconut uses the Macbook sensors, Voltage & current measurements will have about 2% inaccuracy total, versus temperature - the Macbook was not designed to be a 6 digit multimeter.
Have you measured the horse-power of your car, or the torque? Similar situation - they are nominal values.
The battery degradation is a non-linear function of cycles, temperature and workmanship.
Use the computer.
FWIW my 2018 Macbook pro is at 80% capacity after 580 cycles ( 2 years) - and dropped from 99% to 95% very quickly initially.
Edit: just saw that my Macbook now has the "service battery" warning today (!)
br,
L (bona fides: senior member IEEE)
I bought my 16" 2019 in April. Almost immediately the battery capacity started falling. For months, it stayed around 92.5%. Today, the capacity is at 100% and I have 18 cycles on the battery.
This makes me worried that the battery may be failing. I had an iPhone that would go from 100% to around 30% in an hour and then back up.
I also turned off the battery health management last week.
This makes me worried that the battery may be failing. I had an iPhone that would go from 100% to around 30% in an hour and then back up.
I also turned off the battery health management last week.
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I just checked it and I have 28 cycles and 95 percent battery health WTF is this. (MBP 16 2019)
Here's my battery after turning off the battery management. This is more like it. I bought my 16" MBP in April.
I'm wondering if the battery health management reduces capacity artificially? You switching it off and getting your capacity back to 100% ?
When I had it on, my battery capacity was 92.5%.
About battery health management in Mac laptops - Apple Support
Mac laptop computers with an Intel processor use battery health management, a feature designed to improve the lifespan of your computer's battery.
With the management on it is quite normal for the mac to report lower full charge capacity numbers.
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Thanks for pointing out the warning about the errant "Need for service" message. Hopefully, this will prevent people from panicking when they see that message.When battery health management is turned on, your battery's maximum charging capacity might be limited. Although the feature is designed to improve your battery's lifespan, the limited maximum capacity might update your battery status menu to indicate a need for service.About battery health management in Mac laptops - Apple Support
Mac laptop computers with an Intel processor use battery health management, a feature designed to improve the lifespan of your computer's battery.support.apple.com
With the management on it is quite normal for the mac to report lover full charge capacity numbers.
And hopefully, very soon they will let fix the system to not prematurely generate this message when Battery Health Management is turned on.
This happened last week with my wife's 2017 MBP 13'. We noticed a replace battery symbol on the top right. Soon as I turned off Optimize Battery - it went back to normal. Been that way for about a week now.
It's better to keep the battery optimization feature ON, imho, if this is the case and the reported capacity is wrong.
This feature will keep your battery going for longer if you use the laptop plugged to the charger most of the time. Reducing max capacity will reduce the stress when it is "fully" charged.
The problem with this feature is how ominous and vague it is. I just wish they told us precisely how it works. The battery loses calibration when it is not deep cycled for a long time. Does the feature occasionally do this on its own (remove the limit and let it charge to real 100% and then let it drain down and restore the limit)? Should the user do it manually? Too many questions that need answers.
This feature will keep your battery going for longer if you use the laptop plugged to the charger most of the time. Reducing max capacity will reduce the stress when it is "fully" charged.
The problem with this feature is how ominous and vague it is. I just wish they told us precisely how it works. The battery loses calibration when it is not deep cycled for a long time. Does the feature occasionally do this on its own (remove the limit and let it charge to real 100% and then let it drain down and restore the limit)? Should the user do it manually? Too many questions that need answers.
That's so strange if you turn battery management back on does it revert? I am currently on Mojave and my 2018 15" with 1 year on the battery has lost 11%, I hope battery management has improved in Big Sur since I plan to update to that.
I just turned it back on to find out. It may take a day or two for the capacity to change so I'll post back when I know anything. It's already gone down to 99.2.
I've gone back from Big Sur to Catalina and have battery management turned on. My capacity has been hovering around 97.2 since doing so. The battery charge fluctuates between 89%-100. The capacity was down to as low as 89% on Big Sur.
I shut it off as well after a couple of months and see the same result. I suppose it's working as intended. Takes a day or two to jump back up.
Nice! Have you done anything afterwards like reboot, discharge etc. to bring it back to 100%?
Mine has 55 cycles and around 92% with battery management on in Big Sur
I just let it run and use it like I normally did and after a day or two it showed the real capacity. After 13 months since purchasing, the capacity is down to 97.5 with 25 cycles.