The operating temperature of the Sigma 1 battery charger is -4℉~104℉, and the storage temperature is -40℉~140℉.
The built-in safety protection will prevent you from the danger of using it at the extreme temperature that exceeds its operating temperature range.
Note: The above data are for the Sigma 1 battery charger only. The operating temperature of your battery should be checked separately and should follow the relevant safety guidelines.
It is recommended to charge your battery with the Sigma 1 battery charger indoors. Please follow the safety reminders in the user manual.