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Charging your headphones | Bose QuietComfort Ultra Earbuds
Charging your earbuds and case
Charging the earbuds
- Align the charging contacts on the left earbud with the charging pins on the left side of the charging case.
NOTE: Before charging, make sure the earbuds are at room temperature, between 46° F (8° C) and 102° F (39° C).
- Place the earbud in the case until it magnetically snaps into place. The earbuds status light glows according to the charging status.
- Repeat steps 1 – 2 for the right earbud.
NOTE: The earbuds charge if the case is open or closed.
Charging the case
CAUTION: Use this product only with an agency approved power supply which meets local regulatory requirements (e.g., UL, CSA, VDE, CCC).
- Connect the small end of the USB cable to the USB-C® port on the bottom of the charging case.
- Connect the other end to a USB-A wall charger (not provided) or computer. The charging case status light glows solid amber.
NOTE: Before charging, be sure the case is at room temperature, between 46° F (8° C) and 102° F (39° C)
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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