Audio-Technica QuietPoint ATH-ANC7b Manuel D'utilisation page 5

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Installing the battery and case construction
Battery compartment
Pivot right earcup to expose battery compartment.
The ATH-ANC7b requires one AAA battery for operation (included). Use only disposable
AAA alkaline batteries. Do not use rechargeable batteries.
1. Move headphone power switch to the "OFF" position.
2. Pivot right earcup to expose battery compartment.
3. Insert AAA battery, observing correct polarity as marked.
4. Close battery compartment cover. Note: Close cover completely. The right earcup will
not pivot freely if the battery compartment is not completely closed.
Note: Power indicator light blinks to indicate low battery.
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