Inserting and removing the batteries/rechargeable batteries
You can operate the wireless microphone either with batteries (AA, 1.5 V) or with the rechargeable Sennheiser BA 2015 battery.

Screw the rear part of the wireless microphone in the direction of the arrow (counter-clockwise) off of the handle of the wireless microphone.
When you remove the wireless microphone during operation, mute is automatically activated. MUTE appears in the display panel. When you screw the microphone back together, mute is deactivated.

Pull the rear part of the wireless microphone all the way out.

Open the cover of the battery compartment.

Place the batteries or the BA 2015 rechargeable battery in the battery compartment as shown on the cover. Please observe correct polarity when inserting the batteries/accupack.

Close the cover.

Push the battery compartment into the handle of the wireless microphone.

Screw the rear part of the wireless microphone back onto the handle.
Battery status
Charge status of the batteries:
► 
Charge status is critical (LOW BATT):
► 