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When charging a smartphone, the temperature of the charger and body usually rises rapidly, and sometimes even feels hot to the touch. What is the normal temperature when charging a mobile phone? Are mobile phone batteries more afraid of cold or hot?

Let's take Apple and Android phones as examples to provide specific explanations.

Moderate temperature increase during charging is normal

The built-in batteries used in current mobile phones are all lithium batteries, which are sensitive to temperature. In general, the temperature of the battery is between 20-27 degrees and the voltage is 3.7V. If charged with a standard charger, the voltage will gradually increase to approach 4.2V.

The battery temperature will also rise to 30-40 degrees Celsius, which is generally normal, and it is not surprising to exceed this range.

But if the phone is in a hot state and the battery itself is in a high temperature state, it is not safe to charge the phone. It can damage the battery's lifespan, and in severe cases, it can cause the battery to overheat and explode.

Due to the sensitivity of lithium batteries, not only are temperatures too high and unsafe, but temperatures too low can also affect the stability and service life of the battery.

Therefore, do not place the battery in a high temperature area, as areas above 50 degrees Celsius can easily cause damage to the battery; Placing it in a low temperature place, such as a refrigerator or freezer, will increase resistance and accelerate battery consumption.

Low ambient temperature may cause phone crashes

What are the specific working temperatures for smartphones, iPhone and Android phones respectively?

Let's take a look at the Apple phone first. According to data provided on Apple's official website, the normal operating temperature of the iPhone is 0-35 degrees Celsius; The optimal operating temperature is 22 ° C; The non working temperature is -20~45 degrees Celsius, while the ideal temperature range is between 16 ° C and 22 ° C.

The key point is that Apple claims to avoid placing the iPhone in a temperature higher than 35 ° C, as it may cause damage to the battery capacity. Therefore, as mentioned earlier, charging an iPhone at high temperatures may further damage the phone.

On the contrary, when using a phone in a very low temperature environment, you may find that the battery life is shortened, but this situation is only temporary. When the battery temperature returns to the normal operating range, its performance will also return to normal.

Let's take a look at Android phones again. Huawei once provided a storage temperature of -40 to 70 degrees Celsius, but in fact, this is only a theoretical value. After all, some mobile phone materials may have been "baked" in an environment of 70 degrees Celsius.

Returning to the issue of low temperature, in addition to the temporary problem with the phone battery caused by too low temperature, if the outdoor temperature enters the room from too low, it will cause water vapor to condense onto the phone, enter the motherboard, and make the phone damp, leading to sudden crashes or even inability to power on.

In addition, there are many factors that affect the temperature of smartphone batteries, and we need to analyze them based on the specific operating system used and environmental factors.

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