Xiaomi Power and Performance: What It Is and How to Improve Device Performance

When it comes to performance, most users think of processors, RAM or MIUI. But there is one critical but often overlooked factor: power system: How the device manages power consumption affects not only battery life, but also the actual speed of execution of tasks. For example, why does the new Redmi Note 13 Pro+ sometimes “brake” when charged up to 80%, and the old Poco F3 suddenly starts to warm up for no apparent reason? The answer lies in the algorithms of power distribution.

In this article, we’ll explore what power and performance are in the context of Xiaomi devices, how they are related, and what can be done to make your gadget work faster and hold charge longer. We’ll analyze official MIUI settings, hidden features (including Developer Options), and common myths — for example, whether “fast charging” affects CPU wear or why the “High Performance” mode in MIUI 14+ automatically shuts down when battery power is low.

It's important to understand that performance and power are not just a battery and a processor, it's a complex system of interplay between hardware, firmware and customization, and if you want to get the most out of your Xiaomi, you'll have to go through the details.

What is power in the context of Xiaomi: not just the battery

When users talk about “power” in smartphones, they usually mean battery capacity (e.g., 5,000 mAh in Xiaomi 14 Ultra) or charging technology (e.g., 120W HyperCharge).

• 🔋 Battery - type (Li-Po), capacity, degree of wear.
• ⚡ Power Controller – a chip that controls charging/discharge (e.g. Qualcomm Quick Charge or Surge) P1 top-end).
• ⚙️ Algorithms MIUI — How the system distributes energy between the processor cores, GPU background.
• 📉 Thermodrosselation – automatic decrease in productivity during overheating.

For example, the Xiaomi 13T Pro uses a Surge G1 controller that not only speeds up charging, but also dynamically adjusts voltage depending on the load, which means that when you start a heavy game (such as Genshin Impact), the system can temporarily increase the voltage on the processor, but also limit the background activity of other applications, as a result, the FPS remains high and the battery discharges more slowly.

But there's a pitfall here: if the battery is worn out (for example, its capacity has dropped to 70% of its original capacity), the power controller starts to malfunction. This can lead to unexpected lags even on flagship models. So before optimizing performance, it's always worth checking the battery status through Settings → Battery → Battery Condition.

How nutrition affects productivity: 3 key mechanisms

The link between power and performance in Xiaomi devices is made through three main mechanisms, and understanding these processes will help you to properly customize your gadget.

1. Dynamic Power Distribution (DVFS) is a technology where the system adjusts the processor frequency and voltage in real time depending on the load. For example, the Snapdragon 8 Gen 2 (installed in Xiaomi 14) uses up to 8 cores with different architectures. At low battery charge, MIUI can turn off some cores or reduce their frequency to save energy.
2. Thermothrottle: If the CPU temperature is above 45–50°C (the threshold depends on the model), the system will force performance to decline, especially for Mediatek Helio devices (like the Redmi Note 12), which are warmer than Snapdragon smartphones.
3. Background optimization: MIUI aggressively closes the background processes if power saving mode is enabled, which can lead to delays when switching between applications (for example, Telegram or WhatsApp reboot when they return to them).

Fun fact: Android 13+-based MIUI firmware has introduced Adaptive Battery, which analyzes user habits and optimizes power consumption for frequently used applications. However, this feature doesn't work perfectly - sometimes it mistakenly limits resources for games or instant messengers. To turn it off, go to Settings → Battery → Adaptive Battery.

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If your Xiaomi suddenly starts to brake while charging, try turning off the Optimized Charging feature in the battery settings. Sometimes it limits performance to "extend battery life."

Performance modes in MIUI: which to choose and when

MIUI offers three main performance modes that directly affect energy consumption, which can be found in Settings → Battery → Performance mode (on some models, the path may differ), and how they differ and in which cases, which mode to use.

• 🔄 Balanced. Default mode. MIUI It dynamically adjusts processor frequency and background activity, and is suitable for most tasks (social media, video, light games).
• ⚡ High performance, maximum CPU frequency, no back-end limitations, perfect for gaming (PUBG Mobile, Call of Duty, or video rendering, but: battery runs down 30 to 40 percent faster.
• 🔋 Energy saving: It limits performance, reduces screen brightness, turns off background synchronization, useful if the charge is below 15% and you need to "pull" to the socket.

An important caveat: on MIUI 14+ devices, High Performance automatically shuts down if the battery charge drops below 20%, to protect the battery from overload, and to get around this limitation, you can use Developer Options:

1. Activate Developer Mode: Settings → About Phone → MIUI version (click 7 times).
2. Back to Settings → Additionally. → For developers.
3. Find the item Disable performance restriction at low charge and turn it on.

Enable the "High Performance" mode for games|Disable background optimization for key applications|Check the temperature of the processor during loading|Use energy saving only in critical cases-->

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Attention: Continuous use of High Performance mode reduces battery life. If you notice that the battery has become discharged too quickly (for example, from 100% to 0% in 4-5 hours), return to balanced mode and check the status of the battery through Settings → Battery → Battery Condition.

Hidden Power Settings: How to Unlock Maximum Performance

MIUI hides a number of options that allow you to fine-tune the balance between power and performance, and these options are available through Developer Options or an engineering menu, and here are the most useful ones:

• 🔧 Limitation of background processes. By default MIUI Limits the number of background processes to 4-5. To increase the limit (for example, for multitasking), go to For Developers → Background Process Limit and select Standard Limit or No Limits.
• ⚙️ Decrease in animation time (Scope of animation window, Scope of animation transition) speeds up the system response but does not affect battery consumption — 0.5x.
• 📊 Monitoring of use CPU. B For developers → Monitor CPU You can see what's loading the system. If you have com.miui.home or android.systemui hanging there, it's a sign of a software lag).

For advanced users, there's another way to fine-tune it, which is the engineering menu, and to get there, type in the dialer code:

##4636##

In the Battery Information menu, you will see the actual state of the battery, including the wear and tear level (Battery health field). If the value is below 80%, it is time to change the battery, otherwise no settings will save you from lag.

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Warning: Changing the parameters in the engineering menu without understanding the consequences can lead to unstable operation of the device or even damage to the battery. For example, a forced increase in voltage on the processor (if such an option is available) will accelerate its wear.

Typical User Mistakes: What Kills Performance and Battery

Many Xiaomi device owners are unaware of their actions that impair both performance and autonomy, and these are the most common mistakes:

• 🔌 Constant charge to 100%. Lithium polymer batteries degrade faster if kept on full charge. Optimal range is 20-80%. MIUI Optimized charging is a feature that stops the charge by 80%, but it is often turned off for convenience».
• 🎮 If you run Genshin Impact with 10% battery, the system will force you to lower the power. FPS, To avoid a sudden shutdown, it is better to connect the charger or use powerbank.
• 🧹 Cache cleaning is "manual." Many users regularly clear the cache through Settings → Storage, thinking it's going to speed up the phone, actually it's going to reload the data and put additional battery consumption on it.
• ☀️ If you leave your phone in direct light (like a torpedo in a car), the power controller will start throttling the processor, even if you're not using the device.

Another common problem is that the sync settings are incorrect, and by default, MIUI syncs data (mail, contacts, weather) every 15 to 30 minutes. If you don't need instant notifications, increase the sync interval:

1. Go to Settings → Accounts and Synchronization.
2. Choose your Mi Account or Google account.
3. Turn off automatic synchronization or set the interval to 1-2 hours.

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The most dangerous mistake is the use of non-original chargers, cheap cables or power supplies can supply unstable voltage, which leads to overheating of the power controller and reduced performance.

How to Check Real Performance: Tests and Tools

To objectively assess how your food settings affect your performance, you need to do some testing.

• 📊 AnTuTu Benchmark. shows overall device performance, including tests CPU, GPU, memory UX (Important: run the test when the battery is charged >50%, otherwise the results will be underestimated.
• 🎮 3DMark. A specialized test to assess graphic performance, useful for gamers because it shows real-world performance. FPS play.
• 🔋 AccuBattery. The app analyzes the state of the battery and shows how quickly it degrades. Especially useful is the battery health feature, which estimates wear and tear as a percentage.
• 🌡️ CPU Monitor. Tracks processor frequency, temperature and core usage in real time. Helps detect throttling.

Example: If your Xiaomi 12 Pro scores below 700,000 on AnTuTu (800,000+), it’s a sign that the system is limiting performance.

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Note: If performance has not recovered after resetting the settings to factory, the problem may be in the hardware (for example, the thermal paste on the processor has detached or the power controller has failed), in which case only the service center will help.

FAQ: Frequent questions about Xiaomi's nutrition and performance