Have you noticed that your Xiaomi has become hot like an iron even under minimal load? Overheating is not just a discomfort, but a real threat to the battery and internal components. In this article, we will discuss the 10 main reasons why Redmi, POCO and Mi phones warm up, and also give step-by-step instructions for diagnosing and fixing the problem. From banal battery wear to hidden viruses, you will learn how to return your device to normal temperature.
It's important to understand that the normal operating temperature of a smartphone is between 30°C and 45°C when used actively. If the body heats up to 50°C+ and the battery goes down in an hour, that's a good cause to sound the alarm. We won't advise "just turn off the phone" or "buy a new one" - instead, you'll get specific actions that you can do yourself, even without going to the service center.
1. Battery wear is the main cause of overheating
The battery is the most vulnerable component in any smartphone, and over time, its capacity decreases and internal resistance increases, which causes the battery to heat up when charging and even when standing still, especially for phones older than 2 years.
How to check battery wear on Xiaomi:
- 🔋 Enter the phone code ##4636 in the app## → Select "Battery Information." Health should be close to 100 percent. If it's below 80 percent, the battery is critically worn out.
- 📊 Use the AccuBattery app (available on Google Play) to show the actual capacity and temperature of the battery in real time.
- ⚡ Pay attention to charging speed: if the phone is warming and charging slower than before, this is a sure sign of battery degradation.
Critical information: Starting with the Redmi Note 10, Xiaomi uses batteries with MTW (Multi-Tab Welding) technology that heat less, but still prone to wear. If your phone is released before 2021, the probability of a battery problem is 2 times higher.
⚠️ Warning: Never use your phone while charging if it is heated above 45°C. This can cause the battery to bloat and even fire.Switch off the charger and let the device cool down.
2 Powerful Games and Applications: When Iron is at its Limit
Xiaomi with Snapdragon 8xx or Dimensity processors are game monsters, but performance comes with heat. Games like Genshin Impact, Call of Duty Mobile or PUBG make the GPU run at 100%, which leads to heat up to 50-60°C.
How to reduce heat during games:
- 🎮 Lower the graphical settings in the game: turn off the smoothing, shadows and reduce the resolution.
- ⚙️ Enable the performance mode in the settings MIUI: Settings → Special facilities → Performance mode.
- 🧊 Use a cooling case or fan for your smartphone (such as Black Shark FunCooler).
- 🔄 Close all background applications before launching the game.
If the phone is warm even in simple games (for example, Among Us), the problem can be hidden in the thermal paste, over time it dries up, and the heat sink deteriorates, in which case only disassembling and replacing the thermal interface will help.
3. Viruses and malware: hidden resource eaters
Many users are unaware that their phone is infected, and viruses can disguise themselves as system processes and load the processor 50-70% in the background, leading to constant heating, even when the phone is idle.
Signs of infection:
- 📱 The phone is warming up on standby.
- 🔋 Battery sits down for 3-4 hourly.
- 📊 Task Manager has unknown processes (e.g., high-load com.android.system).
How to check and remove viruses:
- Install an antivirus (Malwarebytes or Dr.Web Light)
- Check application permissions in Settings → Apps → Permissions. Revoke geolocation and autorun access from suspicious programs.
- If the antivirus does not find anything, but the phone is still warmed - reset to factory settings (Settings → About the phone → Reset settings).
⚠️ Note: Some viruses block the installation of antiviruses.If you can't download Malwarebytes from the Play Market, try installing it through APK from the official website (pre-disabling the source check in the security settings).
4.Fast charging: convenience with side effects
Xiaomi’s Quick Charge, Dash Charge or HyperCharge technology allows you to charge your phone in 30 minutes, but has the flip side: the higher the charging power, the stronger the heat. For example, the Redmi Note 12 Pro+ with support for 120W can heat up to 50°C when charging.
How to charge Xiaomi without overheating:
| Charging power | Max, temperature. | Recommendations |
|---|---|---|
| 33W and below | 35-40°C | Safe mode, you can use the phone while charging. |
| 67W-80W | 45-50°C | It's not recommended to play or watch videos. It's better to charge in airplane mode. |
| 120W+ | 50-55°C | Charge only with the original cable, do not use the phone until it cools to 40°C. |
If your Xiaomi is warming up even when charging 18W, the problem may be:
- 🔌 Non-original charger (use only branded units from Xiaomi).
- 🔗 Damaged cable (check for bending and melting).
- 🔋 Faulty power controller (requires diagnosis in the service).
💡
If the phone gets hot while charging, disconnect it from the mains and put it on a metal surface (such as an aluminum stand) – this will speed up cooling.
5. MIUI Updates and Firmware Errors
Sometimes overheating begins after the MIUI update.
- 🐛 Bugami in the new firmware version (especially relevant for betta versions).
- 🔄 Conflict of old data with new software.
- 📱 Incorrect optimization for a particular model.
How to fix it:
- Check if your version of MIUI is a test version. Go to Settings → About Phone → MIUI Version. If there are beta letters in the version number, roll back to a stable build.
- Make a cache reset: turn off the phone, then press Volume up + Power, select Wipe Cache.
- If the problem has occurred after the update, try to roll back to the previous version via the Mi Flash Tool (instructions on the official Xiaomi website).
Important: Before rolling back the firmware, back up the data through Settings → Additional → Backup and Reset.
Check the temperature in Settings → About the phone → Condition |
Turn off auto-run of unnecessary applications |
Remove the cache via Recovery|
Watch the phone. 1-2 day without installing new applications-->
6.Overheating due to poor network signal
If your Xiaomi is basking in places with a weak 4G/5G signal, the fault is the communication module. The phone is constantly trying to "catch" the network, loading the processor and raising the temperature, this is especially noticeable in the subway, elevators or outside the city.
How to reduce heat:
- 📶 Switch to the switch. 3G in network settings: Settings → SIM-maps and mobile networks → Preferred type of network.
- ✈️ Turn on the "Airplane" mode in places with a bad signal.
- 🔄 Turn off automatic network search in roaming.
If your phone is warm even with a good signal, check:
- 📱 Is there a second insert? SIM-card (double communication module increases heating).
- 🔧 Is VoLTE or VoWiFi enabled (sometimes these features conflict with firmware).
7. Physical damage: dust, moisture, falls
Even minor damage can lead to overheating:
- 🌫️ Dust in the charging connector worsens heat sink.
- 💧 The ingestion of moisture leads to oxidation of contacts and short circuits.
- 💥 The impacts can damage the heat paste or disconnect the radiator from the processor.
How to check:
- Light a flashlight into the charging socket. If dust is visible, clean it carefully with a toothpick (not with metal objects!).
- Check the moisture indicator (a small white dot inside the slot for the snag). SIM-If it turned red, the phone was in contact with water.
- If the phone falls, inspect the case for dents near the processor (usually at the top).
⚠️ Warning: If the phone not only warms up after a fall, but also reboots or turns off on its own when heated, this is a sign of damage to the motherboard.
What to do if your phone falls into the water?
8. Incorrect settings and background processes
Sometimes overheating causes seemingly harmless functions:
- 📍 Always on GPS (Especially in navigators like Yandex.Maps).
- 🔍 Automatic sync of Google Photos, Drives or Mi Cloud.
- 🎵 Weather widgets or music players that work in the background.
How to optimize:
- Turn off auto-update apps in the Play Market.
- Limit background activity for unnecessary apps: Settings → Apps → Permissions → Auto Run.
- Use Easy Mode in MIUI: Settings → Special Opportunities → Easy Mode.
Hidden threat: Some Xiaomi system applications (e.g. com.miui.analytics) can consume up to 15% of the CPU in the background. ADB:
adb shell pm disable-user --user 0 com.miui.analytics💡
Even Xiaomi’s factory applications can cause overheating. Regularly check battery consumption in Settings → Battery and turn off suspicious processes.