How to cool your Xiaomi phone: a complete guide to reducing temperature

Modern Xiaomi, Redmi and POCO smartphones are equipped with powerful processors and screens with high refresh rates, which inevitably leads to heat generation. When the device body gets hot and the system issues a warning about overheating, it is a signal that the heat sink is not coping with the load. Ignoring this symptom can lead to accelerated wear of the lithium polymer battery and even deformation of the internal components.

Many users mistakenly believe that high temperatures are the norm for gaming models, but constant heating above 45 degrees Celsius is critical to the chemical structure of the battery. In this article, we will discuss why your Redmi or Black Shark turns into an iron, and what software and physical methods will help return the temperature to normal without losing performance.

The first thing you need to do when you see an overheating is to assess the current state of the system, check which applications are using the most power, and close the background processes that you don't need right now. Often, the cause of trivial heating is a stuck process in a MIUI or HyperOS system, which continues to consume the CPU resources even after the program interface is closed.

Reasons for overheating of Xiaomi and Redmi smartphones

Understanding the source of the problem is half the solution. Xiaomi smartphones can get hot for a variety of reasons, from banal sun use to deep system bugs. The Snapdragon and Dimensity processors used in these devices have high clock speeds that, when operated intensively, generate significant amounts of heat energy.

Often, users experience heat during fast charging. Quick Charge technology or the company's HyperCharge involves delivering large current in a short time, which physically cannot pass without releasing heat. If you use your phone while charging, especially for games or video calls, the temperature can reach critical values at which the system will forcefully limit the current of charge.

⚠️ Warning: If the phone is heated in standby mode (screen is off, running) 1-2 It may indicate a malfunction of the power controller or moisture entering the housing.

Another common cause is poor cellular signaling, where when a smartphone is in a sensitive reception zone, the communication module starts to run at maximum power, constantly searching the network, which puts a tremendous strain on the radio module and the processor, causing local heating at the top of the device, where the antenna is usually located.

Software Methods: Optimization of MIUI and HyperOS

The MIUI shell and the new HyperOS have built-in power management tools that users often ignore. The first step is to clean up memory and close background applications through the built-in Security utility, which not only frees up RAM, but also forcibly stops processes that can cause cyclical load on the CPU.

The second important thing is to control the refresh rate of the screen. AMOLED-display and support for 120 Hz or 144 Hz, constant operation in this mode significantly increases the heat output of the GPU. It is recommended to switch to Auto mode or manually select 60 Hz in the Settings menu → Screen. → Update frequency if you are not playing games right now.

• 📱 Disable unused communication modules: GPS, Bluetooth and NFC They consume energy even in the background if they are active.
• 🌑 Use the dark interface theme: AMOLED-screens black pixels are turned off, which reduces the load on the matrix and slightly reduces heating.
• 🔄 Update the system: newer versions of Xiaomi firmware often fix optimization errors that cause the “battery” (discharge in standby).

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Turn on Lite Mode in your system settings if the phone is old, which will simplify the interface and reduce the CPU load, which will automatically reduce heat.

Also worth paying attention to auto-update apps. If you download and install updates for a dozen programs simultaneously in the background through Google Play or GetApps, the processor will run at its limit. Set a limit on auto-update only over Wi-Fi and only when you connect to charge to avoid peak loads at the wrong time.

Physical methods of rapid cooling of the device

When software methods fail, you have to resort to physical assistance, and the easiest and safest way is to remove the protective case, and tight silicone or leather cases work as a thermal insulator, preventing the natural removal of heat from the aluminum frame or the glass back cover to the surrounding air.

Many users wonder if you can put your phone in the refrigerator. The answer is categorical: never put your smartphone in the freezer. A sharp temperature drop will cause condensation inside the case, which will short circuit and corrosion of the board. You can only be in front of the fan for a short time or in a cool (not cold!) place.

For gamers who spend hours playing games, there are special external coolers, these devices that are attached to the back, actively remove heat using Peltier elements or powerful fans. For owners of Black Shark and Redmi game versions, this is almost a must-have accessory, allowing you to maintain a stable FPS without trottling.

Settings for gamers: Game Turbo and optimization

Xiaomi gaming smartphone owners are familiar with the Game Turbo feature.This tool not only speeds up the launch of games, but also allows you to fine-tune the performance. In the Game Turbo settings, you can choose a “Balanced” profile instead of “Productive”, which will limit the maximum CPU frequency and prevent excessive heating during long sessions.

It’s important to understand that maximum graphics in games is the main enemy of a cold smartphone. Decreasing the graphics settings from Ultra to High or Medium can reduce the CPU temperature by 5-10 degrees, with little to no effect on the visual perception of gameplay. It’s also worth turning off vertical sync (V-Sync) if there is such an option in the game, since it makes the GPU work constantly, even when it’s not necessary.

⚠️ Warning: Don’t use Google Play’s cooler apps that promise to cool your phone in one button, at best, they just shut down processes (like the in-built cleaning), and at worst, they show ads and mine cryptocurrency in the background, further heating the device.

For advanced users, there is the option of disabling unused system services through ADB, but this requires caution. However, standard developer settings are often enough. In the Developer menu, you can find the item "Restricting background processes" by setting the value "No more than 2 processes" This severely limits multitasking, but guaranteed to save from overheating on older models.

Rules of operation of the battery at high temperatures

The lithium polymer batteries used by Xiaomi are extremely sensitive to heat. The optimal range for them is from +15 to +25 degrees Celsius. At temperatures above +30 degrees, the accelerated degradation of the chemical composition of electrolyte begins, which leads to an irreversible decrease in capacity. If the phone is regularly heated to 40-45 degrees, after a year you can lose up to 20% of the real battery capacity.

Especially dangerous is the combination of fast charging and navigation. GPS-The navigator in the car while charging is a scenario where the phone heats up the fastest. Sun rays heating the screen, plus charge current, plus work. GPS-In such cases, it is better to use navigation without connecting to a charger or use an external fan aimed at the back of the smartphone.

• 🔋 Do not charge your phone on soft surfaces (sofa, pillow) as this disrupts air circulation.
• ☀️ Avoid direct sunlight: left on the torpedo of the car smartphone can heat up to critical values in 15 minutes.
• 🎮 Take breaks in games: every time 45-60 Just give me a minute. 5-10 cool-off.

If you notice that the phone started warming after a system update or installing a particular application, try resetting the network settings or, in extreme cases, a full reset to factory settings (Wipe Data).

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The most effective way to extend the life of Xiaomi battery is to prevent it from regularly heating above 40 degrees Celsius during charging and active actions.

When is the time to bring your phone to service?

There is a fine line between working heat and malfunctioning: If your Redmi Note or Poco F heats up to a point where it hurts to hold it in your hand, and it happens even with simple actions (calls, SMS, Reading the news is a cause for concern. Normal working heat feels like heat, not like heat.

The alarm signal is the battery bloating, and if the back cover or the screen starts to move away from the case, or the phone stops lying flat on the table and rotates when you press the corner, the battery is inflated, and it is strictly forbidden to operate such a device, because it threatens with fire or explosion, in which case no software will help, you need an urgent replacement of the battery.

It is also worth contacting the service if the phone heats up in the camera or upper body immediately after turning on, even before the operating system loads, this may indicate a short circuit in the power supply or a malfunction of the processor. Attempting to “treat” such problems by freezing or resetting settings will only aggravate the situation.