ISOtunes Link Bedienungsanleitung Seite 8

Batteries
The headset can also be powered by 3 AAA Batteries (not included).
3 AAA Batteries hold a 24+ hour charge and will need to be replaced.
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Slide the Battery Cover Latch (9) Remove the Lithium Battery Pack and place
"up" towards the headband to your 3 AAA Batteries. When using AAA
release the Battery Cover. batteries, please ensure you have properly
oriented the batteries.
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