How to Disable Apple's Performance Management Features in Older iPhones in the iOS 11.3 Beta

Discussion in 'iOS Blog Discussion' started by MacRumors, Feb 6, 2018.

  1. MacRumors macrumors bot

    MacRumors

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    #1
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    Starting with the second beta of iOS 11.3, Apple has introduced a new "Battery Health" feature that's designed to provide you with more information about the state of your battery and whether or not it's impacting device performance.

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    If your iPhone has a degraded battery that is leading to throttling issues, the "Battery Health" section will let you know about it, and it will provide an option to turn off performance management to put a stop to any throttling that's going on.

    There are, however, some nuances to this feature that you need to know about, which we'll outline below.

    When Installing iOS 11.3

    When you first install the iOS 11.3 update, all performance management features that might have been enabled are automatically disabled. So when you first install the beta, you don't need to do anything because performance management is turned off.

    You will, however, need to watch out for an unexpected shutdown that turns your device off, because if this happens and you have a bad battery, performance management will be turned back on. More on this below.

    Accessing Battery Health

    You can check out the status of your battery in the new Battery Health section, which will tell you the maximum capacity of the battery in your iPhone and whether or not it's running at peak performance capacity. Here's how to get to it:
    1. Open up the Settings app.
    2. Scroll down to "Battery" and tap it.
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    3. Tap on "Battery Health."
    All the info you need to know about your battery is listed here. Maximum Capacity will let you know how your battery is performing overall, and it directly correlates to how long your iPhone will last on a single charge.

    Peak Performance Capability will let you know if a degraded battery has resulted in performance slowdowns.

    What it Looks Like When Your Device Running Normally

    When your iPhone is running as normal, under the "Peak Performance Capability" section, it will say "Your battery is currently supporting normal peak performance."

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    You may still have somewhat degraded Maximum Battery capacity as this number slowly declines after charging cycles, but throttling does not kick in until the battery becomes severely degraded and can no longer offer enough power to support spikes in processor usage.

    What it Looks Like if You Have a Bad Battery

    If you have a bad battery, it will say "Your battery's health is significantly degraded," and it will let you know that an Apple Authorized Service Provider can replace the battery to restore full performance.

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    It will also tell you if performance management features have been turned on, and it will provide an option to turn them off.

    What Happens When You Have an Unexpected Shutdown

    As mentioned above, all performance management features are disabled automatically upon installing iOS 11.3. If your device has a bad battery and it shuts down because of it, performance management will be automatically enabled.

    If this happens, you will see the following message under "Peak Performance Capability" in Battery Health.

    "This iPhone has experienced an unexpected shutdown because the battery was unable to deliver the necessary peak power. Performance management has been applied to prevent this from happening again."

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    If you have an unexpected shutdown AND your battery capacity is significantly degraded, you'll see a slightly different message suggesting an immediate battery replacement.

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    How to Disable Performance Management if Your Battery is Bad

    After experiencing an unexpected shutdown, performance management is turned on automatically on your iPhone. You will, however, see a small "Disable" option when this happens, and if you tap it, you'll be given the option to disable performance management.

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    Disabling performance management will turn off any throttling that's been applied, but it will leave your device vulnerable to future unexpected shutdowns.

    You will not see the option to disable performance management until your device has experienced at least one unexpected shutdown, and once you disable it, there is no option to turn it on again.

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    If your iPhone shuts down again while performance management is disabled, though, performance management will automatically turn it on again.

    This means you will need to turn performance management off again each time your device experiences an unexpected shutdown, as Apple believes slower performance is preferable to sudden losses of power.

    How to Permanently Disable Performance Management

    If you have a device with a bad battery that is experiencing unexpected shutdowns and is subjected to Apple's performance management feature, the only permanent solution is to get a new battery.

    Having your battery replaced will restore an older iPhone to full working order, with maximum capacity and performance capabilities.

    Apple is offering $29 battery replacements for the iPhone 6 and newer through the end of 2018. Your battery does not need to be experiencing shutdowns to be replaced - you can also get a replacement for a battery that's not operating at maximum capacity, no questions asked. You can get one $29 battery replacement per device.

    Newer devices like the iPhone 8, iPhone 8 Plus, and iPhone X that have a high maximum capacity near 100% don't need replacement, but at levels below 90%, it could be worth getting a new battery while Apple is still offering them at a discounted price. To get a battery replacement, contact Apple Support.

    If you have AppleCare+ or are under your one-year device warranty and have a battery that's below 80 percent, you won't even need to pay the $29 fee -- that's considered a defective battery and Apple will replace it for free.

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    Devices Impacted by Performance Management

    Performance management features have been installed on the iPhone 6, 6 Plus, 6s Plus, 7, 7 Plus, and SE. On other iPhones, like the iPhone 8, 8 Plus, and X, you will be able to see readings for Maximum Capacity and Peak Performance Capability, but you won't need to worry about throttling or unexpected shutdowns.

    Article Link: How to Disable Apple's Performance Management Features in Older iPhones in the iOS 11.3 Beta
     
  2. scrapesleon macrumors 6502a

    scrapesleon

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    Location:
    Jamaica
    #2
    The unexpected shutdown were horrible good times though I will never forget
     
  3. agsystems macrumors 6502a

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    Aug 1, 2013
    #3
    seems pretty comprehensive - looks like Apple got all the situations you would want to know about your battery.
     
  4. qy0 macrumors newbie

    qy0

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    Feb 6, 2018
    #4
    What can I do if it does not show up on my 6s? 11.3 (15E5167f)
     
  5. AndyMed18 macrumors newbie

    Joined:
    Jun 10, 2016
    #5
    “...but throttling does not kick in until the battery becomes severely degraded”

    Maybe I’ve just got a bad phone, but my battery health is 88%(info from Apple) and my iPhone 6s is throttled very often... To me, 88% shouldn’t warrant the kind of throttling that they are doing. It’s especially not “severely degraded.”

    I get the optimal experience argument with the shut off issue, but it seems like the throttling is more prominent than they say it is and sugar coating their power issues is just letting them get away with it.
     
  6. Razeus macrumors 603

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    Jul 11, 2008
    #6
    For some reason, I just can't get past that this is all a bunch of BS.
     
  7. keysofanxiety macrumors G3

    keysofanxiety

    Joined:
    Nov 23, 2011
    #7
    It depends what you class as “throttled” when your battery performance is fine. No iPhone CPU, or mobile CPU for that matter, would run at the maximum frequency at all times when it’s not necessary, otherwise you’ll be burning through your battery in no time.

    The OS will always have some features to maximise battery life if it’s on standby or not running intensive apps. Similarly, if you’re experiencing performance issues such as UI lag on a newer OS then this may not necessarily be remedied by higher CPU clockspeed: the bottleneck could be RAM, graphics, or simply the age of the hardware on a more resource-intensive OS.

    Don’t take this as an apologist remark. It’s just a gentle reminder that clockspeed below the max frequency when using your phone doesn’t immediately mean it’s throttled. Think the max quoted frequency as Intel’s “turbo boost”. It’ll rarely hit that with normal usage.
     
  8. Jimmy James macrumors 68040

    Jimmy James

    Joined:
    Oct 26, 2008
    #8
    Your phone is fine. The OS power management "feature" is not.

    Next steps?

    1. Implement user accessible fix
    2. Manufacture more unexpected shut downs.
    3. Require user to reset switch manually every time.
    4. Sell more phones.

    I'm no less cynical about this issue after seeing the work around.
     
  9. realeric macrumors 65816

    realeric

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    Jun 19, 2009
    Location:
    United States
    #9
    Apple is still doing it wrong. Unexpected shutdown is caused by defective hardwares but Apple is trying to cover it up with a software patch. Replace them all free, Apple. It’s a design defect.
     
  10. Norbs12 macrumors 6502

    Norbs12

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    Location:
    Mountain View, CA
    #10
    What do you do for a living? I'm assuming some sort of engineer that works on chip power management and/or battery technology field since your opinion on the subject is so strong?
     
  11. Black Tiger macrumors 6502

    Joined:
    Jul 2, 2007
    #11
    Are you a battery chemist?
    --- Post Merged, Feb 6, 2018 ---
    Huh. Who would have thought that batteries wear out? Yeah it’s some Apple conspiracy to sell more phones because they are on the ropes financially, right? Come on.
     
  12. Norbs12 macrumors 6502

    Norbs12

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    Apr 24, 2015
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    Mountain View, CA
    #12
    He clearly must be, why else would anyone that doesn't know anything about anything form such a strong opinion on a subject they have no clue about? That would just be crazy...
     
  13. whooleytoo macrumors 604

    whooleytoo

    Joined:
    Aug 2, 2002
    Location:
    Cork, Ireland.
    #13
    Hmmm, what to do.

    - install latest iOS, turn off device throttling on older devices.
    - don't install latest iOS, as newer iOS versions are slower on older devices.

    I'm like that cat with a slice of toast stuck to its back, I don't know which way to spin...
     
  14. Black Tiger macrumors 6502

    Joined:
    Jul 2, 2007
    #14
    Well what many are forgetting is that older hardware just can’t keep up with the latest software too. So it’s battery in part, but the rapid pace of processor advancements is to blame as well. An iPhone X is just more capable than a 6s. The same is true of 3 year old Androids compared to the latest Androids.
     
  15. Norbs12 macrumors 6502

    Norbs12

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    Apr 24, 2015
    Location:
    Mountain View, CA
    #15
    Only the latest 11.2.x version have battery related throttling. If you have 11.x your phone will already be about as slow as it will get (from the more complex OS). Installing a high revision of 11.x will not slow down your phone more.
     
  16. pika2000 macrumors 601

    Joined:
    Jun 22, 2007
    #16
    Liking the info on max capacity. This should eliminate most, if not all those fake battery apps as well.

    Of course, people will still whine and moan on this, even though Apple already offer replacement for $29.
     
  17. Jimmy James macrumors 68040

    Jimmy James

    Joined:
    Oct 26, 2008
    #17
    Agreed. Batteries do wear out. I'm familiar with the effects of use, disuse, and temperature on different battery chemistries.

    Apple throttles phones with batteries that are not worn out. Unreconcilable.
     
  18. patent10021 macrumors 68030

    patent10021

    Joined:
    Apr 23, 2004
    #18
    iPhone 6 Plus / 11.3 (15E5167f)

    This screen is not in my battery options. Mine looks just like the old screen.
     
  19. alchemistmuffin macrumors 6502

    Joined:
    Dec 28, 2007
    #19
    Unless phone is still on AppleCare or AppleCare Plus, which you might get replacement battery free of charge.

    If your phone is still under warranty, you might get the replacement battery free of charge as part of AppleCare. Friend who works at Apple said that their policy is normally to replace battery free of charge if the phone is still under warranty, phone is two years or younger, and shows battery as degraded in diagnostic test. I had iPhone 5 battery and iPhone 6 battery replaced for free of charge after one year of owning, due to degraded battery.
     
  20. jonblatho macrumors 6502a

    jonblatho

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    Jan 20, 2014
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    Oklahoma/Missouri
    #20
    Update to beta 2.
     
  21. DeepIn2U macrumors 603

    DeepIn2U

    Joined:
    May 30, 2002
    Location:
    Toronto, Ontario, Canada
    #21
    Oh don’t you fret it’s legit!

     
  22. jonblatho macrumors 6502a

    jonblatho

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    Oklahoma/Missouri
    #22
    Come again?
     
  23. fairuz, Feb 6, 2018
    Last edited: Feb 6, 2018

    fairuz macrumors 68000

    fairuz

    Joined:
    Aug 27, 2017
    Location:
    San Jose and Berkeley, CA
    #23
    Same, kinda. I just doubt the simplicity they claim. From what I've seen, it's impossible to get an accurate reading on anything battery-related. I used to check my battery health on both my iPhone and Mac, and the tools would always say my battery is healthy when it's obviously not, or the other way around. And battery remaining percentage indicators are rarely anywhere near correct except when your device is new. I don't think it's Apple's fault, just the way of batteries.
    --- Post Merged, Feb 6, 2018 ---
    I can tell that much just from looking at how my phone worked before the throttling update: No unexpected shutdowns despite the lack of this "feature." Now it's throttled to the point of being nearly unusable. It often takes 10 seconds to open my music, FFS. Half the reason I got an iPhone instead of Android was to not develop an eye twitch from lag, but here I am.
     
  24. patent10021 macrumors 68030

    patent10021

    Joined:
    Apr 23, 2004
    #24
    yeah didn't see that newer update. Works. (thumbs up emoji)

    Not sure why emoji don't work on a Mac site.
     
  25. Wags macrumors 6502a

    Joined:
    Mar 5, 2006
    Location:
    Nebraska, USA
    #25
    For sure if have shutdowns with 95% battery capacity like in the example.
     

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