Sennheiser DW Series User Manual page 37

Cleaning and maintaining the headset system
36 | DW Series - User Guide
Headset Pro1 – HS
1 Open the battery compartment cover.
2 Remove the rechargeable battery and carefully loosen the connector
plug of the rechargeable battery.
3 Insert the connector plug of the new rechargeable battery into the
connection socket. Observe correct orientation of the connector plug.
4 Replace the battery compartment cover.
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