Weinmann VENTIremote WM 27745 Device Description And Instructions For Use page 12

5. Push the battery compartment cover closed until it engages with an audible click.
Note:
Always keep a full U9VL-BP-type battery to hand.
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12 Set up and operate the device
4. Put the battery and the connecting cables in the bat-
tery compartment.
Note:
Ensure that the connecting cables are underneath
the battery in the battery compartment, so that
the connecting cables are not trapped when the
battery compartment is closed.