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[Solved] How to fix External Battery Pack Thermal Throttling Alert on Heavy Spatial Rendering caused by Dual-cell battery controller power delivery throttle under sustained high TDP compute on Apple Vision Pro 256GB

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Home › Forums › Apple Vision Pro & visionOS › [Solved] How to fix External Battery Pack Thermal Throttling Alert on Heavy Spatial Rendering caused by Dual-cell battery controller power delivery throttle under sustained high TDP compute on Apple Vision Pro 256GB

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  • November 15, 2026 at 5:35 am #20577
    Aria Fisher
    Certified Tech (Lvl 5)
    Diagnostic Hardware Specs: Apple Vision Pro 256GB | OS Version: visionOS 2.1 | Archive Source: Apple Support Community #256431698

    I am running into a persistent issue on my Apple Vision Pro 256GB running visionOS 2.1.
    Whenever the machine encounters Dual-cell battery controller power delivery throttle under sustained high TDP compute, the following diagnostic log appears in Console:

    PowerUI: [BatteryController] Thermal junction temperature threshold reached: limiting peak luminance to 80%

    I verified that hardware connections are intact and tested across different power sources. What is the verified diagnostic procedure to permanently eliminate this symptom?

    Apple TV 4K 3rd Gen | Dual HomePod mini | iPhone 15 Pro Max | Cambridge, UK
    Smart Home & Matter/Thread Integrator | "Verified Apple Discussions Archive"
    November 15, 2026 at 5:35 am #20578
    Kimberly Morales
    Community Contributor
    Apple Recommended / Verified Community Solution
    This canonical solution was verified and marked as solved in the Apple Support Community archive.

    Optimizing ambient battery airflow, verifying braided cable locking collar engagement, and power-cycling.

    Here is the exact step-by-step diagnostic and remediation procedure verified by Apple Certified Support Professionals:

    1. Ensure the aluminum battery pack is resting on an uninsulated surface with free ambient airflow (not inside pocket).
    2. Verify the braided tether connector is firmly locked: align white dot on cable with white dot on audio strap, insert, and rotate clockwise 45 degrees until yellow dot disappears.
    3. Reboot Vision Pro by holding both the Top Button and Digital Crown until the Apple logo appears on EyeSight display.

    Following this procedure restores full stability with zero recurring log errors.

    MacBook Pro 16″ M3 Max (128GB) | SanDisk Professional G-RAID Shuttle 4 | Sydney, AU
    Apple Certified Support Professional (ACSP) | Final Cut Pro / DaVinci Colorist & Editor
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