Technoline WS 9750 Manuel D'utilisation page 59

HOW TO INSTALL AND REPLACE BATTERIES IN THE TEMPERATURE STATION
The Temperature Station uses 2 x AA, IEC LR6, 1.5V batteries.
When batteries will need to be replaced, the low battery icon
will appear on the LCD. To install and replace the batteries,
please follow the steps below:
1. Lift up the battery compartment cover.
2. Insert batteries observing the correct polarity (see
marking).
3. Replace compartment cover.
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