Renkforce 1267653 Notice D'emploi page 29

Operation of the weather station and/or the outdoor sensor with rechargeable
batteries is possible. However, the lower voltage (battery = 1.5 V, rechargeable
battery = 1.2 V) causes the operating duration and display contrast to reduce
strongly.
Rechargeable batteries are also very temperature-sensitive, which will further
reduce the operating time of the outdoor sensor.
Therefore, we recommend using only high-quality alkaline batteries instead of
rechargeable batteries for the outdoor sensor as well.
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