Bose QuietComfort headphones and earbuds troubleshooting

Published specification

What is true of this model and changes how you fix it

• Official specifications
  Bluetooth 5.3 with SBC/AAC/aptX Adaptive. Battery up to 24 hours with Immersive Audio off, 18 hours with it on. 35mm drivers, three-band EQ, weight 8.96oz. CustomTune personalized sound calibration.
• Type — ANC Bluetooth headphones (battery)
  Bose's flagship over-ear headphones with top-tier active noise cancellation AND Immersive Audio (spatial). Bluetooth, battery-powered. Battery/ANC/Bluetooth symptoms apply.
• Immersive Audio
  Immersive Audio spatialises sound (Still mode fixes the stage in front of you; Motion mode moves with your head). It uses more battery when on, so runtime is shorter with Immersive Audio active — that is expected.
• Battery & ANC
  ANC and Aware modes toggle on the headphone or in the Bose app; short runtime is usually Immersive Audio plus ANC at high volume. Charge by USB-C.
• Battery and charging (from Bose's owner's guide)
  Up to 24 hours with Immersive Audio off and 18 with it on, a full charge in up to 2 hours, and 15 minutes of charging for up to 3 hours of playback.
• Bluetooth
  Bluetooth multipoint lets it connect to two source devices at once. The 2nd Gen adds Bluetooth 5.4 with SBC, AAC and aptX Adaptive.
• Reset (from Bose's 2nd Gen support article)
  Hold the Power/Bluetooth button, connect the USB cable to the left earcup while still holding it, wait two seconds, then release. Bose publishes separate reset articles for each generation.

Where these figures were read. bose.com/p/headphones/bose-quietcomfort-ultra-headphones-2nd-gen/QCUH2-HEADPHONEARN.html (Bose QuietComfort Ultra Headphones 2nd Gen product page)

Manufacturer support for this product line. Bose Support — Product support. Official Bose product support; this key exists so qc-ultra-headphones cites its OWN articles — Bose publishes one per symptom per product.

Also read for this model. Bose — QuietComfort Ultra Headphones owner's guide; Bose Support — Resetting your product, QuietComfort Ultra Headphones (2nd Gen).