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QuietComfort® 2 Acoustic Noise Cancelling™ headphones

Sold from 2003 – 2009

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Replacing the battery in your product

The battery in your product can be removed so you can insert a new battery if your battery weakens or dies. Find out how to access and replace the battery.

To replace the battery:

Tip: If the headphones will be stored for extended periods of time without use, removing the battery.
  1. Tilt the right earcup inward to access to the battery compartment
  2. Open the battery door by gently pressing and lifting the tab toward the top of the earcup
  3. Tip the headphones so the battery drops out
  4. Insert the new battery (positive/+ side first)
  5. Close the battery door by gently pressing it into the earcup until it clicks.
Inserting battery
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