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drownedyasas

macrumors newbie
Original poster
Dec 23, 2019
4
1
I am on a 4 months old MBP 16" and yesterday, as usual, I was gaming on windows via bootcamp and when I game the battery slowly drops even if plugged in and that's normal. So, like every time, after I am done, I see that the battery is not at 100% in windows and yesterday it was at 85% after I closed the game. I rebooted into MacOS and I saw that my battery was suddenly at 100% which was weird since just seconds ago it was at 85%.. I went and checked the health and now, from 97% it was down to 85%! And not only that, after a few hours of use it dropped more, now it's at 82% and it seems to have stabilised itself, what happened? Is there a way to fix it or is there a problem with my battery?
 

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been seeing several posts where the battery indicators are bonkers
must be the way you are holding it
 
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Maybe that's why I dropped? I installed and ran bootcamp once and happened to notice my battery health was at 89%

I figure I'll keep an eye on this until the pandemic passes and then I'll go to the Apple Store.
 
I am on a 4 months old MBP 16" and yesterday, as usual, I was gaming on windows via bootcamp and when I game the battery slowly drops even if plugged in and that's normal. So, like every time, after I am done, I see that the battery is not at 100% in windows and yesterday it was at 85% after I closed the game. I rebooted into MacOS and I saw that my battery was suddenly at 100% which was weird since just seconds ago it was at 85%.. I went and checked the health and now, from 97% it was down to 85%! And not only that, after a few hours of use it dropped more, now it's at 82% and it seems to have stabilised itself, what happened? Is there a way to fix it or is there a problem with my battery?

Windows is a known destroyer of the MacBook batteries. Most MacBook owners who have battery health ~30-40% are active Bootcamp users. I had a very similar experience with my MacBook5,1. Now no Windows, no issues.

Screen Shot 2020-04-04 at 9.12.05 pm.png
 
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I am on a 4 months old MBP 16" and yesterday, as usual, I was gaming on windows via bootcamp and when I game the battery slowly drops even if plugged in and that's normal. So, like every time, after I am done, I see that the battery is not at 100% in windows and yesterday it was at 85% after I closed the game. I rebooted into MacOS and I saw that my battery was suddenly at 100% which was weird since just seconds ago it was at 85%.. I went and checked the health and now, from 97% it was down to 85%! And not only that, after a few hours of use it dropped more, now it's at 82% and it seems to have stabilised itself, what happened? Is there a way to fix it or is there a problem with my battery?

FWIW, I'm seeing something similar. I have a 2.4 MBP 16in 32GB RAM 8GB 5500. If I do anything taxing on the machine for an extended period of time, the battery charge reported in Coconut falls, as does the design capacity mAh. I have seen my battery go down to 84% design capacity (battery health.) Interestingly, it seems to "come back" after being used for a time not under load.
 
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wh
FWIW, I'm seeing something similar. I have a 2.4 MBP 16in 32GB RAM 8GB 5500. If I do anything taxing on the machine for an extended period of time, the battery charge reported in Coconut falls, as does the design capacity may. I have seen my battery go down to 84% design capacity (battery health.) Interestingly, it seems to "come back" after being used for a time not under load.
since it dropped to 84%. how’s it now that it’s been used for a time not under load, % wise?
 
wh

since it dropped to 84%. how’s it now that it’s been used for a time not under load, % wise?

It's back up to 98% design capacity. I have seen the pattern though: if I load up a game (the only game I really play is Cities Skylines,) it will do the exact same thing again... It's totally reproducible. I have also seen it while using the 630 graphics or the 5500. So after heavy use there's a decline in design capacity, once the battery is used in a less taxing manner following the intense use, the battery seems to go back to the 98% health / design capacity.
 
It's back up to 98% design capacity. I have seen the pattern though: if I load up a game (the only game I really play is Cities Skylines,) it will do the exact same thing again... It's totally reproducible. I have also seen it while using the 630 graphics or the 5500. So after heavy use there's a decline in design capacity, once the battery is used in a less taxing manner following the intense use, the battery seems to go back to the 98% health / design capacity.
I don’t really game on my unit and I’ve noticed that my battery capacity dropped to 94% from 97%, it never actually crossed the 97% mark out of the box except for once (99.7% right after unboxing it). And it’s been hovering between 936-95% for a couple of months now and idk why. it’s triggering my ocd lol
 
I don’t really game on my unit and I’ve noticed that my battery capacity dropped to 94% from 97%, it never actually crossed the 97% mark out of the box except for once (99.7% right after unboxing it). And it’s been hovering between 936-95% for a couple of months now and idk why. it’s triggering my ocd lol

I think the best advice is to just stop looking at it! If you run into an issue down the road, it's covered so will get fixed.
 
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I think the best advice is to just stop looking at it! If you run into an issue down the road, it's covered so will get fixed.
didn’t buy apple care. ironic since i paid over 3900 usd for this machine but oh well
 
It's an old joke, making fun of when Steve Jobs tried to pass off responsibility for the iPhone 4 antenna issues to the customer.

excuse me but:
i have an early 2017 MBP and took years, an the courts, for apple to own up to the butterfly keyboard

the bad thing about Apple is if it went wrong the consumer gets the blame
apple will pass off the responsibility till it looses the class action law suite

sorry:
Apple products are over priced for their quality level
 
For anyone having this issue, this is what I tried today. I downloaded "Turbo Boost Switcher" on a hunch. Since the issue seems to occur when the MBP is under load, my rationale was perhaps whatever software is running is engaging the turbo boost for a prolonged period, drawing more power than the charger can provide thus taxing the battery as well. At any rate, disabling turbo boost with this app while running the game I have had an issue with, Cities Skylines, seems to have solved it. Battery health is staying at 99% while running this game for well over an hour now. Might be worth a try.
 
For anyone having this issue, this is what I tried today. I downloaded "Turbo Boost Switcher" on a hunch. Since the issue seems to occur when the MBP is under load, my rationale was perhaps whatever software is running is engaging the turbo boost for a prolonged period, drawing more power than the charger can provide thus taxing the battery as well. At any rate, disabling turbo boost with this app while running the game I have had an issue with, Cities Skylines, seems to have solved it. Battery health is staying at 99% while running this game for well over an hour now. Might be worth a try.

I think this is smart...I bought it a few days ago preemptively to manage temperatures (and battery life) with my i9.
 
I think this is smart...I bought it a few days ago preemptively to manage temperatures (and battery life) with my i9.
And that is an Apple from nowadays... you buy Ferrari to drive with a limited key capable of 60 mph.
 
And that is an Apple from nowadays... you buy Ferrari to drive with a limited key capable of 60 mph.
Honestly, limiting the processor is overkill. The machine is mostly fine. There's some sort of weird software/hardware thing where the battery health in Coconut is dropping like 10 percent.
 
I'm guessing it fails to properly account for the battery draw when under mains power but still needs extra load, and eventually realises it's counting is wrong when charging continues beyond where it expected.
 
And that is an Apple from nowadays... you buy Ferrari to drive with a limited key capable of 60 mph.

Given that turbo boost is built in, it's more like buying a Ferrari that accelerates when the car feels like accelerating, rather than when I do. Since I bought turbo boost switcher of my own choice, it's more like I'm choosing to drive at the speed limit most of the time. If I flip a switch, I can turn turbo boost back on. Am I required to use it? No. Does it make me feel like I have a little more control over battery life when I'm not charging and doing light work on the lappie? Yes.
 
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