It is important to prevent overheating and freezing the smartphone. According to some studies, the switched off device is safe to store at temperatures from -20 to +60 ° C. But the optimum operating temperature is completely different: from +15 to +35 °C.
Freezing Your Smartphone
If the temperature is too high, the processor resets the frequency and slows down, and the battery begins to degrade. Its capacity gradually decreases, and in some cases the battery may swell or even catch fire. Therefore, it is important not to charge your phone under your pillow or leave it in direct sunlight for a long time, such as on the dashboard of a car.
Try to use your smartphone in the shade. Even if the screen remains readable in the sun, the heat won't do any good.
In the cold, the device can slow down, quickly discharge and even turn off completely. At low temperatures, the chemical reaction in the battery slows down or even stops completely. At the same time, chemists are not very well aware of why this happens.
Returning from the cold to a warm room, let the phone lie down or leave for 10 to 30 minutes and heat up slowly. Try not to use it or connect it to a charger - the sudden heat of the battery and processor can damage internal components or cause condensation and corrosion inside the case.
Do not keep the device in near-zero or negative temperatures for more than 5-10 minutes