Leitner LH400/500/600 Battery Replacement

Flip to the bottom of your headset mic and look for a small gap (the battery door).
Gently use your fingernail to pull out the battery door and remove it.
With two fingers, grab the Leitner battery and gently pull it straight out.
To reinsert a battery, position the battery so the word Leitner is on the same side as the headset on/off button and the white arrow is pointing into the battery compartment. Gently slide the battery in, and replace the battery door.