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SOLVED iPad battery health 80% limit - weird behavior

filo01filo01
edited January 15 in Hardware

Is there anyone here who uses the 80% battery limit? I tried it today on my new iPad Pro M5, and when charging reached 80%, it behaved strangely. I had Loopy Pro and Tonality running in the background, and when I wanted to turn off the display, it didn't work—it lit up again and cycled between showing of datetime and battery status. Has anyone else encountered this?

Comments

  • uncledaveuncledave

    Hi. I've never seen this. Could it be a flakey connection of the charger?

  • filo01filo01

    @uncledave said:
    Hi. I've never seen this. Could it be a flakey connection of the charger?

    No I guess. All behaves normally when 80% limit restriction is set to OFF and iPad is charged up to 100%.

  • anicktanickt

    Never seen this. I’ve been using 80% since I got my A16 iPad on 26.2

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  • wimwim

    That kind of looks to me like the iPad might be locked and face-id isn't kicking in to unlock it.

  • filo01filo01
    edited January 12

    @offbrands

    Is Tonality being ran seperate or as an AUV3?

    Separate (standalone)

    Is this iPadOS 26 or 18?

    26.2

    Did a restart change this behavior?

    I didn't do restart. Now I have set that same scenario set and I'm waiting when charging reach 80% limit again. I'll let you know.

    What is the intention with turning off the display with both of those in the background running?

    It wasn't my intention. The display became blurry after some time and then I saw that weird behavior described in my first post. So I thought I simply turn off the display but it doesn't work either.

    @wim

    That kind of looks to me like the iPad might be locked and face-id isn't kicking in to unlock it.

    Not sure because it didn't happen when 80% limit is off. But I will test it again during daylight.

  • filo01filo01
    edited January 12

    Another test, this time in daylight. The LoopyPro and Tonality were still running. The display was off, but when it reached 80%, it turned on by itself and started cycling, as shown in the video in the introductory post.
    When I disconnected the power supply, the display turned off by itself. When I reconnected the power supply, the display started cycling again after a while. When I unlocked the iPad (using Face ID), the battery indicator did this. Is it normal when 80% limit toggle is ON?

    Then I let the iPad discharge to 75%, restarted it, connected the power supply, and waited until it reached the 80% limit. Then I launched Loopy Pro and Tonality, and the cycling started again. At first the display is dimmed then turned off and then cycling started.
    When I load a project with high CPU consumption in Loopy, the display is permanently ON without cycling (state never changed to dimmed), but there are periodic changes in the battery indicator, as in my video above in this post. When I manually turn off the display by iPad's button then cycling is back :(
    EDIT: It is cycling even when I'm in the different room so out of FaceID camera scope.

  • uncledaveuncledave

    Hmmm. This might just be a feature (or problem) of the newest device, iPad Pro M5. Different iPads have different internal firmware. Also, even though it's the "same" iPadOS version, different devices receive different updates, adapted to the device. You should at least report it to Apple.

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  • filo01filo01

    @offbrands

    Maybe turning off the battery percentage might help?

    I think it's just a switch to display the percentage number to the left of the battery icon.

    You mentioned you have M2 Air with 80% limit ON. If you had your iPad charged to 80% and connected to a power source, opened some applications that consume a lot of CPU, put them in the background, and turned off the display (or let it dim and turn off), what would happen? Would the display remain off after couple of minutes even under these conditions? Could you try this, please?

    @uncledave Thanks for the Apple link. I ordered new 120W charger, and if that doesn't help (or if we don't figure out the cause in the meantime), I would contact Apple.

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    edited January 12
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  • filo01filo01

    @offbrands said:
    I had autolock set to 2 minutes as I usually do, drambo running several of its own modules while also running several plugins, I didnt get any of battery ui glitches that you did. I havent shut off my ipad from 80% in weeks btw so its already on.

    I have auto-lock on 2 minutes value as well.

  • filo01filo01
    edited January 15

    @filo01 said:
    I ordered new 120W charger, and if that doesn't help (or if we don't figure out the cause in the meantime), I would contact Apple.

    Thank you all for your suggestions and help! The charger (not the cable) was indeed the cause. After replacing it, the problem disappeared.

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