Why Xiaomi is warming up when charging: technical reasons and ways to eliminate

Have you noticed that your Xiaomi smartphone turns into a mini stove while charging? it's not just an unpleasant sensation - heavy heating can shorten battery life, cause sudden shutdowns or even damage internal components. In this article, we will look at all the possible reasons why Xiaomi warms up when connected to charging, from harmless features of the firmware to critical iron malfunctions. You will learn how to distinguish normal heating from dangerous, which models of Redmi, POCO Mis are hotter than others, and what to do to return the temperature to safe values.

We will immediately warn you: if the body is heated to 50°C and above (you can check with free apps like this one). AIDA64 or CPU Monitor, and charging is too slow or abrupt, that's a reason to sound the alarm. 80% In some cases, you can solve the problem yourself, but sometimes you need a service center to intervene. 2022–2026 years, including the Redmi Note 12/13, POCO X5/F5 Xiaomi 13/14, where overheating during charging has become a frequent phenomenon after updates MIUI 14+.

1. Normal heating vs dangerous overheating: how to distinguish

Any smartphone gets hot when it's charging -- it's a physical energy conversion process. But where's the line between "it's supposed to be" and "it's time to worry"?

• 🌡️ Body temperature: up to 40-45°C - normal (warm but not burning), above 50°C = risk to the battery.
• ⚡ Charging speed: if the heating speed drops from 33W before 10W — overheating protection.
• ⏳ Heating time: first 10-15 minutes after connection - peak heating, then the temperature should stabilize.

For example, Xiaomi 13 Pro with support 120W HyperCharge can be heated to 47°C in the first minutes of charging is the logic of fast charging. 33W warms up to 55°C and off is a clear sign of a malfunction. You can check the temperature through a hidden menu: enter the code ##4636## in the phone application, then select Battery Information.

2.Fast charging: why Xiaomi is warming up more than others

Xiaomi is actively promoting ultrafast charging technologies: from 33W in budgetary models before 210W It's a law of physics, but why do some phones heat up and others turn into irons"?

The reason lies in three factors:

1. Quality of power supplies: Xiaomi’s original chargers have a built-in cooling system (e.g., vents in the air) 120W-The cheap ones overheat themselves and heat the phone.
2. Battery architecture: in models with dual cells (e.g, POCO F5 Pro heat is distributed evenly than in single cell phones (Redmi) 10A).
3. Control algorithms: in MIUI 14+ Added AdaptiveCharge, which artificially slows charging after 80 percent to reduce heat, but in some firmware, it doesn't work properly.

If you support Xiaomi 67W/120W, but take your time, try to turn off fast charging in the settings: → Battery → Charging settings → Fast charging. It'll reduce the heat by 20–30%.

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Use the original Xiaomi cable with the label 5A or 6A — Thin cables from third-party manufacturers create additional resistance and warm themselves.

3. Software causes of overheating: the fault of firmware or applications

In 40 percent of cases, the heating when charging is caused not by hardware problems, but by software bugs.

• 🤖 Background activity of applications: messengers (Telegram, WhatsApp), social networks (TikTok, Instagram) or games can load the processor even in a folded state. → Annexes → Permits → Auto-start.
• 🔄 Updates MIUI: after major updates (for example, transition from MIUI 13 on 14) The system may not be managing energy properly, especially with the Redmi Note. 11/12.
• 📱 Battery Optimization: If Performance is turned on in the settings instead of Balanced, the phone will warm up stronger. → Battery → Battery mode.
• 🔍 Viruses and mining: some malicious applications use the phone's resources to mine cryptocurrency (like Monero.

To diagnose the problem, run Xiaomi Diagnostics (hidden menu code ##6484##) and select Battery Test. If you see errors in the logs like overheat or thermal throttle, the problem is software.

Disable auto-run of unnecessary applications

Clean the cache in Settings → Storage → Cleanup

Update all apps on Google Play

Try to revert to the previous version MIUI (If the heat has appeared after the update)

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If nothing helps, reset to factory settings, but save data beforehand! Instructions: Settings → The phone. → Resetting settings.

4. Hardware problems: when to carry in the service

If the phone is warming even when the screen is off and without active apps, it's probably because of the hardware.-5 hardware reasons that require repair:

How to check the battery without disassembling? Enter code ##6484## in the engineering menu, select MBAT Test and compare the indicators with the norm:

• 🔋 Capacity: if less than 80% of the factory battery is worn out.
• 📉 Voltage: normal 3.7–4.2V, below 3.5V — clutter.
• 🔥 Temperature: above 45°C at 50% charge - a sign of degradation.

If you suspect a hardware malfunction, do not try to disassemble the phone yourself - Xiaomi models after 2020 use battery adhesive connections, and if you disassemble the plumes carelessly, you can damage the plumes.

5. Features of models: which Xiaomi warms up more often

Not all Xiaomi smartphones are equally prone to overheating, and we analyzed user reviews and service center data from 2023 to 2026 and identified the models with the most complaints:

• 📱 Redmi Note 12 Pro+ 5G: trouble 210W HyperCharge – Heating to 55°C when charging from 0% to 100% in 15 minutes, solved by turning off fast charging after 80%.
• 📱 POCO F5 Pro: defect of the batch with Qualcomm power controller PM8008, It causes heat even when 5W-Replacement of the charger.
• 📱 Xiaomi 13 Ultra: overheating camera (Leica module) while charging and shooting video in the same time 8K. Recommended update to MIUI 15.
• 📱 Redmi 10C: Budget model with a weak cooling system - warms up when charging + Simultaneous use of mobile Internet.

For owners of these models, we have prepared specific recommendations:

Redmi Note 12 Pro+: Use the original power supply unit 120W (articular MDY-12-ED) Charge your phone horizontally, which improves heat sink.

POCO F5 Pro: check the serial number in the Xiaomi service - if it falls into the batch with a defect (numbers 2301 to 2303), contact the service under warranty.

6. How to reduce heating when charging: 10 working methods

If your Xiaomi is warming up, but the diagnostics didn't reveal any critical problems, try these methods. They range from the simplest to the radical:

1. Remove the case - even a thin silicone case can block the heat sink.For models with a metal body (Xiaomi) 12T) It's critical.
2. Use the original RAM – Xiaomi power supplies have built-in overheating protection (e.g., Cypress chip) CYPD4225 into 67W-charging).
3. Turn off fast charging in settings or use an adapter with less power (for example, 18W instead 120W).
4. Charge in airplane mode - this turns off the modules 5G, Wi-Fi and Bluetooth that load the processor.
5. Limit the charge to 80% - in MIUI There is an optimised charging function (Settings) → Battery → Charging settings).
6. Update the firmware -- in MIUI 15 Improved therm control algorithms for Snapdragon 8 Gen 2/3.
7. Clear the connector. USB-C — Use a wooden toothpick and alcohol. ⚠️ Note: Do not use metal objects – you can close contacts!
8. Install a cooling stand for game models (Black Shark, POCO F) fan stands (e.g. Baseus Cooler) are sold).
9. Reset the settings – if the heating appears after the update, go back to the factory settings (don’t forget to make a backup!).
10. Replace thermopaste – in the service it costs 1,000–2,000 ₽, But it lowers the temperature by 10-15.°C (relevant to Xiaomi) 11T Pro and older).

For owners. POCO X3 Pro and Redmi. K40 There's an extra life hack: these models support reverse charging. Connect another phone or accessory to your Xiaomi, and it will cause the system to lower the temperature for security.

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If the phone only warms when wirelessly charging, the problem is the Qi coil. In Xiaomi models, it is located under the back cover and often departs when falling. Repairs will cost 1,500-3,000 ₽.

7.When overheating when charging is the norm

Not always heating is a sign of malfunction. There are 4 scenarios where the temperature when charging is acceptable:

• ❄️ Charging in the cold: if you brought the phone from the street (below 0)°C), it will warm up stronger than usual until it heats up to 10-15°C.
• 🎮 Games + Charging: Starting Genshin Impact or Call of Duty Mobile while charging loads the processor by 80-90%, which causes heating up to 50 percent°C.
• 🔄 First charge of the new phone: during the first 3-5 charging/discharge cycles, the system calibrates the battery, which may be accompanied by increased heating.
• ☀️ Heat in the room: at air temperature above 30°C any smartphone will warm up harder (physics!) Xiaomi even blocks fast charging at 40°C indoors.

In these cases, it is enough to eliminate the external factor (for example, to move the phone to a cool place) and the temperature will return to normal, but if the heat persists longer than 30 minutes after the cause is eliminated, this is a reason for diagnosis.

8.The myths about Xiaomi heating: what to believe and what not to believe

There are a lot of tips on the Internet about Xiaomi overheating, but most of them are myths.-5 They are wrong and explain why they should not believe:

Another popular myth is that if your phone is warm, you should put it in the refrigerator.

⚠️ Warning: sudden temperature difference (for example, from 50)°C to 5°C) may cause condensation within the housing, which will result in short circuits!

FAQ: Frequent questions about Xiaomi heating when charging