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Charging your headphones | QuietComfort® 20i Acoustic Noise Cancelling® headphones
quietcomfort®-20i-acoustic-noise-cancelling®-headphones
QuietComfort® 20i Acoustic Noise Cancelling® headphonesSold from 2013 - 2015

Charging your headphones | QuietComfort® 20i Acoustic Noise Cancelling® headphones

To charge the battery:

Connect a USB cable from the control module to a USB charger. The battery light blinks while charging and glows solid green when charged.

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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Charging your headphones | QuietComfort® 20i Acoustic Noise Cancelling® headphones