For phone:
The operating temperature of the phone is 0℃ ~ 40℃. But if the temperature is too high or too low, it will affect the phone's performance. Please use your phone at a suitable temperature (16℃ ~ 35℃) for better performance.
For phone adapter or charger:
Different models of phone chargers or adapters have different power and operating temperatures. When the ambient temperature is too low or too high, it may limit the phone charging current and reduce the battery activity. It is recommended that you charge the phone at a suitable ambient temperature (16°C ~ 35°C) for a better charging experience.