User Manual
Table Of Contents
- Bose Connect App
 - What’s in the Box
 - Importance of Proper Fit
 - Headset Controls
 - Acoustic Noise Cancellation
 - Operation Switches
 - Microphone Placement
 - Batteries
 - Aircraft Connectors
 - Status Lights
 - Bluetooth Connections
 - Managing Multiple Bluetooth Connections
 - Bluetooth Functions
 - Care and Maintenance
 - Troubleshooting
 - Installation
 - Technical Information
 
 28 
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 ENG
BATTERIES
REPLACE THE BATTERIES
When the battery light blinks red, the batteries must be replaced.
NOTE: For aircraft-powered headsets, batteries are not required for operation if 
 aircraft power is available. See “Aircraft Connectors” on page 29.
1.  Power o the headset. See page 19.
2.  On the back of the control module, press down firmly on the finger indent and 
slide the cover down.
CAUTION: The battery cover is tethered to the control module. Do NOT attempt 
to detach it.
3.  Remove the batteries.
4.  Insert two alkaline AA batteries, observing proper polarity.
CAUTION: If the batteries don’t fit correctly, do NOT force them in. Forcing an 
 improper connection will cause permanent damage to the control 
 module. 
5.  Close the battery cover, press firmly down on the finger indent, and slide the cover 
into place.
New alkaline AA batteries supply up to 45 hours of power for the headset. 
Battery life varies with the ambient noise level of the aircraft, temperature, 
ear tip condition, Bluetooth use, and age of the batteries.










