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Device evidence task · MacBook Air M1

USB-C charging: cable, power and workload

Build a one-change-at-a-time charging comparison before replacing an accessory or battery.

Version 2.0.0 · About 20 minutes to organize observations

Planning estimate for recording observations; excludes charging, backups, drying and service. Not a measured repair time.

Confirm the exact model

Enable JavaScript to record observations. The complete preparation guide is available below.

Preparation guide

  1. Inspect the adapter, cable and accessible port without inserting a tool. Set damaged equipment aside. Use the model’s USB-C connection; a USB-C shape alone does not establish that a cable can charge.

    Source: If your Mac battery will not charge; MacBook Air (M1, 2020) technical specifications · Check the hardware → inspect / different cable; Charging and Expansion

  2. Connect directly to a working outlet and Mac, leaving the dock out. Record whether external power is recognized and whether the battery says charging or paused.

    Source: If your Mac battery will not charge · Check the hardware → outlet / power adapter

  3. If a compatible spare exists, change the cable while keeping adapter, outlet and workload constant; then restore the baseline before comparing another adapter. Label missing spares Not tested.

    Source: If your Mac battery will not charge · Check the hardware → use a different cable / power adapter; original comparison worksheet

  4. Compare the same direct setup during light use. Review the displayed battery-health/charging state; workload and charging optimization can explain a pause without identifying a failed battery.

    Source: If your Mac battery will not charge · Check the software → high performance / battery health

  5. Save work before a normal restart if needed. For Apple silicon, Apple’s power-management advice is a restart; do not follow an Intel SMC key sequence. Record whether the symptom returned.

    Source: If your Mac battery will not charge · Check the software → SMC, Apple silicon

Original schematic showing two left USB-C ports, right headphone jack and a direct one-display comparison.
Original schematic, not to scale. MacBook Air M1 (2020); one native external display. Inspect the real connector before use. · Original schematic; follow the linked manufacturer instructions.

Check the result

  • Only one component changed per comparison.
  • A charging pause is recorded separately from no external power.
Stop conditions
  • Stop using and charging equipment with swelling, casing separation, smoke, a burning smell or suspected battery damage. Do not open or press on it.
  • Set damaged accessories aside. Do not open mains adapters or force connectors.
  • Do not erase, reset, flash firmware or bypass a lock as a default diagnostic step.
Official sources and model fit
  1. If your Mac battery will not charge

    Check the software / Check the hardware · Checked 2026-10-13
    Compatible charging equipment, recognition/load comparison and Apple silicon restart
    Reference only. Original paraphrase and observation worksheets; no copied images or manual pages.

  2. MacBook Air (M1, 2020) technical specifications

    Charging and Expansion / Display Support · Checked 2026-10-13
    Two USB-C Thunderbolt/USB4 ports and one native external display up to 6K at 60 Hz
    Reference only. Original paraphrase and observation worksheets; no copied images or manual pages.

  3. Important safety information for your Mac

    Handling / Built-in battery / Charging · Checked 2026-10-13
    General damaged-equipment and moisture safety only; M1-specific connections are sourced from mac-spec
    Reference only. Original paraphrase and observation worksheets; no copied images or manual pages.

  4. Identify MacBook Air model

    Find model / MacBook Air M1 2020 · Checked 2026-10-04
    Model and chip confirmation
    Reference only. Original paraphrase; no copied images or manual pages.

  5. Use Apple Diagnostics to test your Mac

    Prepare / Apple silicon / Run Apple Diagnostics / Results · Checked 2026-10-13
    M1 Options then Command-D; Tahoe 26+ selected tests versus earlier automatic testing; preserve reference code
    Reference only. Original paraphrase and observation worksheets; no copied images or manual pages.

  6. External display dark or low resolution

    Connections / Support limits / Detection / Accessory permission · Checked 2026-10-13
    Direct video path, Detect Displays and detection versus image
    Reference only. Original paraphrase and observation worksheets; no copied images or manual pages.

Original preparation workflow based on the linked documents. No hands-on device repair testing is claimed.

Related preparation

Exact modelSymptom & recordOpen