Widex MOMENT WPC101 User Instructions page 7

Store and transport the charger within the following conditions:
Temperature
Humidity
Atmospheric pressure 750 mbar
You can find technical data sheets and additional information on your
charger on https://global.widex.com.
Minimum
-20° C (-4° F)
5% rH
7
Maximum
60° C (140° F)
90% rH
1060 mbar