Regardless of which brand and which OS your smartphone is: Android or iPhone, you may encounter that the phone is very hot, and the battery runs down both during operation or charging, and for no apparent reason.
In this article, why the phone can warm up, what exactly can cause heat in it, when this is the normal behavior of the device, and in which cases it makes sense to worry.
Heated components in modern smartphones
Your phone has two main components that can become very hot (these are not the only such components, but usually it is in them):
The processor heats up under high loads, most often we are talking about games, but this is not the only option: for example, it can warm up during long-term video shooting (since it is being encoded, which requires processor resources), some work tasks, and for some , weaker processors and for relatively simple tasks like watching a video.
In turn, the battery heats up when charging (especially when the “Quick charge” function is used and, conversely, during a fast discharge, which, in turn, can be caused by intensive use of the processor and other components (wireless network, GPS), as well as screen brightness.
Among the additional nuances can be noted:
- Heating will be felt to a greater extent at a higher ambient temperature (for example, in the summer at +30 the phone will be hotter when performing the same tasks than at room temperature +20).
- Different processors are heated to varying degrees. For example, it is believed that, all things being equal, MediaTek (MTK) processors are hotter than Qualcomm.
- The degree of how the phone feels heated will depend on the specific model: on the layout of the internal components, the device of the cooling system, and the body material.
- In some cases, heating may be caused by poor communication with the network of the mobile operator.
- If you recently changed the case for the phone, this can also cause heating if it interferes with the normal heat dissipation.
In some cases, the phone quickly heats up normally
First, about the scenarios when heating the phone should not bother you much, since it is quite normal:
- You play a heavy game. Especially if at the same time the phone is charging. Moreover, some games that do not have excellent graphics are poorly optimized, which also loads the processor of your phone. Also, one should not be surprised that with such games the battery runs out very quickly, see Android is quickly discharged, iPhone is quickly discharged .
- You use the phone as a navigator, especially if it happens in the car and the phone is connected to charging.
- You work with some applications that require significant computing resources. These are now available for both Android and iPhone. As a rule, this is something related to graphics and video, but there may be other options, for example, if something is downloaded intensively in a torrent client, the device will also heat up, and, of course, when performing various performance tests.
- Several applications or some large application are being updated at once: this is a fairly energy-intensive process. Also, if your phone has a significant number of applications that perform automatic synchronization, this can cause heat.
- The phone is on charge, especially if features like Quick Charge are used. However, in this case, a “healthy” phone usually does not get hot, rather very warm (35-45 degrees).
- Rings while charging may make the temperature from step 4 higher.
- You are in an area where the phone loses all the time and again finds the network or the type of connection (2G / 3G / LTE) is changing.
- You use the phone in the sun, in the heat, especially if energy-intensive operations are performed while the phone is charging (everything that is described in this paragraph should be avoided if possible, this is undesirable for your device).
As a rule, in these situations the phenomenon is short-term (except for games) and when the factor that affects the processor usage, battery charge and discharge disappears, the phone temperature quickly returns to normal.
When the phone is warming up can be troubling and what to do
If there are no obvious factors that could cause the phone to warm up, this may indicate undesirable effects.
If the phone heats up when it just lies (not on charge), while updating applications, downloading something from the Internet does not occur, we can assume that some application (it is possible that it is malicious) continues to work in the background.
Recently, these have often been cryptocurrency miners integrated into various free applications, but there may be other unwanted applications. To test this feature, you can restart your Android phone in safe mode (all third-party applications will be disabled).
If at the same time the heating has disappeared, try to assume that it was you who installed lately that could have influenced this, and also study the battery report in the settings (see which applications use the battery most in the settings).
Sometimes “guilty” are not malicious applications, but antiviruses or memory cleaning programs: check if the problem persists if you disable or delete them.
Another reason for concern: the phone began to get very hot after replacing some hardware components (battery, charging connector) or after situations where something could damage these components (for example, after the smartphone fell into the water). At the same time, keep in mind that those batteries that you buy yourself or install under the prominent “new original” batteries are very often not such and by themselves they discharge very quickly and do not heat up as the battery from the manufacturer did.
- If a phone with Wi-Fi and Bluetooth wireless networks turned off and not connected to charging is warming up, this is not normal. We are looking for a problem: an unwanted, incorrectly working application or hardware malfunctions.
- When the phone is warming up on charging and at the same time you are doing something on it, the heating is natural.
- If the phone heats up very much and quickly discharges during some games or when using certain programs, but doesn’t happen with other operations, this is usually normal.
- If you just bought a new phone and compared to the old one, it seems hotter at work, this may be due to the difference in hardware components, materials and approach to cooling.