TFA Weather Boy Instruction Manual page 40

INSTALL AND REPLACE BATTERIES IN THE WEATHER STATION
Battery replacement

Replace the batteries when the battery symbol of the weather station appears above the
humidity display.

When the batteries of the transmitter are used up, the low battery icon appears on the upper
display, near the outdoor temperature display.
Note:
In the event of changing batteries in any of the units, all units need to be reset by following the
setting up procedures. This is due to a random security code assigned by the transmitter at start-
The weather station uses 2 x AA, IEC LR6, 1.5V batteries. To
install and replace the batteries, please follow the steps below:
1. Remove the cover at the back of the weather station.
2. Insert batteries observing the correct polarity (see
marking).
3. Replace compartment cover.
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