[Owen Parker]

The 80% limit is enforced by the power management firmware (PMGR) but a liquid-detection event in the Lightning/USB-C port forces a safety override that disables charge limiting until the next full reboot — check log show --predicate 'subsystem == "com.apple.iokit.power"' --info | grep -i "liquid|wet" for kIOLiquidDetectionEvent entries correlating with the 100% nights. A stuck eSIM modem reset (common on iPhone 16 baseband firmware 2.0.x) can also spike thermals past 42 °C, triggering the same override; verify with pmset -g thermlog | awk '/ThermalLevel/ && $NF >= 3'. Hardware recovery: force-restart (Vol+ Vol- Side) to clear the PMGR fault latch, then re-enable Optimized Battery Charging to reset the calibration schedule.

iPhone 14 Pro | Apple Watch Series 10 | MagSafe Duo

Denver, CO | "Let humid USB-C ports air dry — never reach for rice."

[Owen Parker]

Squeeze detection requires a minimum ~0.8 N normal force distributed across the flat bezel; a thick, rigid glass protector can act as a stiff shim that redirects finger pressure toward the curved barrel instead of the flat electrode pads, especially if the protector overhangs the Pencil’s flat edge by >0.2 mm. CLI check: sudo powermetrics --samplers smc -i 100 -n 1 | grep -i "pencil\|stylus" while squeezing to verify the SqueezeForce telemetry channel reports >800 mN at miss events. Recovery: Apply a 0.1 mm conductive copper tape shim only on the flat bezel under the protector (aligned with the two rectangular squeeze electrodes) to restore the force path; alternatively, enable AssistiveTouch → Custom Gesture → “Squeeze” as a software fallback while testing thinner protectors (ESR Paper-Feel 0.15 mm or Apple’s own Polyurethane sleeve).

iPhone 14 Pro | Apple Watch Series 10 | MagSafe Duo

Denver, CO | "Let humid USB-C ports air dry — never reach for rice."

[Owen Parker]

Active liquid detection alerts on the iPhone’s connector will throttle the Secure Element communication required to sign the trusted number update request, potentially causing a silent failure in the Settings app. Thermal throttling from sustained Stage Manager workloads can similarly rate-limit the cloudd daemon propagating the change to Apple’s identity servers. Resolve hardware alerts and cool the device to ensure the cryptographic handshake completes before the session token expires.

iPhone 14 Pro | Apple Watch Series 10 | MagSafe Duo

Denver, CO | "Let humid USB-C ports air dry — never reach for rice."

[Owen Parker]

– Use a genuine Apple USB‑C to Lightning cable (or a certified data‑capable USB‑C cable) for the restore; charging‑only cables lack data lines and cause Error 9.
– After swapping to a proper cable, put the iPhone into Recovery Mode again and retry the restore in Finder.

iPhone 14 Pro | Apple Watch Series 10 | MagSafe Duo

Denver, CO | "Let humid USB-C ports air dry — never reach for rice."

[Author]

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