Xiaomi Redmi 8 smartphones, despite their budget cost and age, remain popular due to their reliability. However, heavy use of applications, prolonged conversations or working in the heat often lead to noticeable heating of the case. Understanding how much the device has warmed up is critical to prevent trotting (decreased performance) and extending the battery life.
In this article, we will discuss in detail how to find out the temperature of the Xiaomi Redmi 8 phone with built-in tools and with the help of third-party software. You will learn to distinguish normal working heat from dangerous overheating that can damage electronic components.
Normal indicators and causes of heating
Before you sound the alarm, you need to understand the physical limits of the mobile processor Snapdragon 439 installed in this model. In downtime or light tasks (calls, messengers), the temperature should be kept in a comfortable range.
Heat is usually caused by resource-intensive tasks, such as playing games or video, and can also be caused by a bad cellular signal that causes the modem to run at power limits, and it is important to note that sensor readings can vary depending on which crystal you are checking.
Below is a table with indicative temperature values for different device states:
| Status of the device | CPU temperature (processor) | BAT temperature (battery) | Sensations |
|---|---|---|---|
| Standby regime | 25–32 °C | 25–30 °C | Cold. |
| Light load | 33–40 °C | 30–35 °C | Warm. |
| Heavy load | 41–50 °C | 36–42 °C | Hot. |
| Critical heating | Above 55°C | Above 45°C | Very hot. |
⚠️ Warning: If the Xiaomi Redmi 8 battery temperature exceeds 45 degrees Celsius, immediately stop using the device and let it cool. Prolonged heating above this threshold irreversibly reduces battery capacity.
Use of the USSD Engineering Menu
The fastest way to access hidden sensors is by using special codes. The MIUI shell that is installed on the Redmi 8 often uses standard Android code to check battery status, a method that requires no additional software installation and works even without Internet access.
To run the diagnosis, open the Phone app and dial the combination ##4636##. If the code is right for your firmware version, the Check menu will open. Select Battery Information. This shows the key parameters: charge level, voltage and, most importantly, the current temperature in degrees Celsius.
The code's not working?
It is worth noting that on some global versions of MIUI, access to this menu may be blocked by the carrier or manufacturer, in which case the system simply ignores the input or gives a message about a connection error, then you will have to use alternative methods of monitoring through ADB or applications.
Checking through MIUI system settings
Xiaomi's built-in tools don't always show the exact temperature in degrees, but they do effectively report the state of the system. The standard "Safety" app analyzes the load and warns of overheating. This is a basic level of protection that should be familiar to every owner.
To check status, go to Settings → About Phone → All specs (or similar path depending on the version of MIUI). However, more detailed information is provided by the developer menu. To activate it, you need to quickly click on the MIUI version seven times in the About Phone section.
When activated, the Advanced Settings menu will have a "Developers" item, where you can find process statistics, although a direct thermometer is rare, and most often, the system will simply force applications to close when the critical core temperature is reached.
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To quickly access battery statistics, use the Battery widget on your desktop, which shows percentages, not temperature, but allows you to instantly see the most energy-intensive applications.
Monitoring through thermometer applications
The most accurate data comes from Google Play, which reads information directly from the motherboard's thermoregulation sensors, and Redmi 8 is a great fit for apps like CPU-Z, AIDA64, or DevCheck.
After you install a CPU-Z, for example, go to the Battery or Thermal tab, and you'll see not only the overall temperature, but also the heating of the individual zones, which helps you understand whether the battery or the processor is warming under load, and this data is indispensable for diagnosing malfunctions.
- 📱 CPU-Z — Classic genre, shows the temperature of each core of the processor.
- 🔋 AIDA64 — Provides the most detailed report on all sensors of the device.
- 🌡️ DevCheck – has a convenient widget for constant monitoring on the home screen.
⚠️ Warning: Avoid installing questionable cooler apps that are often viruses and can’t physically cool your phone by just loading your RAM with ads.
Using ADB commands for advanced
For users who want maximum data, there's a way to connect via a computer, and with USB debugging and Android Debug Bridge console commands, you can get raw data from sensors, and this way works on any version of MIUI without root rights.
First, you need to enable USB debugging in the developer menu, then connect the phone to your PC and type a command in the terminal, and it will display a list of all the temperature sensors and their current values in real time.
adb shell dumpsys batteryOr for a more detailed view of the sensors:
adb shell cat /sys/class/thermal/thermal_zone*/tempThe result is a list of numbers. Usually the temperature is in milligrades (e.g., 35,000 is 35.0 °C), and this method allows you to see the difference between the temperature of the phone's skin and the temperature of the hottest core.
☑️ Preparation for diagnosis through ADB
What to do in case of critical overheating
If you learn that your Xiaomi Redmi 8 has reached a critical temperature, you need to act quickly.Ignoring warnings can cause the battery to bloat or the display to detach due to melting glue.
First, remove the protective case, as it interferes with heat transfer. Then close all background applications and turn off communication modules (GPS, Bluetooth) if they are not in use. The screen is one of the main sources of heat, so reduce the brightness.
- 🚫 Don’t put your phone in the fridge or freezer – condensate will kill the fee.
- ❄️ Place the device on a cold surface (cuffle, metal) in the shade.
- 📴 Turn off your phone if it continues to heat up in downtime.
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The most common reason Redmi 8 is constantly heating is a faulty battery or “broken” sector of memory, causing constant data recording.