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Charging your headphones | Bose QuietComfort Ultra Headphones (2nd Gen)
To charge the headphones:
- With the headphones off your head, connect the small end of the USB cable to the USB-C port on the left earcup. NOTE: The headphones won’t charge when they are on your head and connected to an external power source.
- Connect the other end to a USB power source such as a computer or wall charger. The headphones begin charging, and the status light glows solid amber. When the headphones are fully charged, the status light glows solid white.
Charging time
- Allow up to 3 hours to fully charge the headphones.
- Depending on the following settings, a full charge powers the headphones for up to:
Noise Cancellation Immersive Audio Playback Time Off Off 45 Hours On Off 30 Hours On On 23 Hours - When the headphone battery level is low, a 15-minute charge powers the headphones for up to 3 hours (up to 2 hours with Immersive Audio enabled).
Hear the battery level
Each time you power on the headphones, a voice prompt announces the battery level. When the headphone battery is low, you hear “Battery low.”NOTE: To visually check the battery, see the status light located on the left earcup.
TIP: You can also hear the battery level using a shortcut. The battery level must be set as a shortcut using the Bose app.
Plugging in overnight will not overcharge the battery
Lithium batteries have a built-in auto-off feature when a full charge is reached to prevent the battery from being overcharged. Even while still plugged in, the battery level will have to drop below a certain point to trigger the charging again.
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