How to check the battery performance on Xiaomi

Xiaomi smartphones are famous for their autonomy, but over time, even the most capacious batteries are subject to natural wear. Users often notice that the device begins to discharge faster, spontaneously turn off at 15-20% charge or long charge. These symptoms indicate that the Li-Ion cell is running out of life or the calibration system is lost.

Unlike iOS, Android does not provide a simple indicator of battery health as a percentage of health in the standard settings menu, but there are hidden engineering tools and software methods in the MIUI and HyperOS shells to get detailed information about the current state of the grid.

In this article, we will look at proven diagnostic methods to help you understand whether you need to change the battery or software calibration, and we will look at both built-in tests and deeper methods of analysis through the computer.

Hidden Codes and Engineering Menu

The fastest way to start a primary diagnosis is to use USSD-In Xiaomi smartphones, a hidden test menu is provided by a special code that allows access to hardware tests. Enter the combination ##6484## or ##4636 in the "caller##.

Once you enter the code, the CIT (Customer Interface Test) interface will open on the screen, and here's a long list of components that you can check, we're interested in the power section, depending on the firmware version, it can be called Battery indicator, Battery status, or simply Battery.

Within this menu, you can see the key parameters: current charge level, voltage, temperature, and connection status. Notice the value of the voltage: if it drops dramatically under load, it's a sure sign of chemical degradation.

⚠️ Warning: Do not change the settings in other sections of the engineering menu unless you are sure of your actions. Resetting the calibration of the sensors can lead to incorrect operation of the touch screen or network.

This method is good for quick checks, but it does not show the percentage of wear (Health).To get more accurate data on how much percent of capacity lost battery since purchase, will require other methods.

Analysis via About Phone and Battery Stats

In the new versions of the MIUI 13, 14 and HyperOS shell, the company added a battery state display directly to the system menu, which is the easiest way for the average user, without requiring the installation of third-party software.

To find this information, go to Settings → About Phone and click on the battery icon or kernel version several times (the number of clicks may vary).

The alternative is through usage statistics. Go to Settings → Battery and study the discharge graph. If you see a sharp jump in the graph line down without active applications, this indicates a stretched battery.

• 🔋 Status: Shows the current state (Good, Bad, Overheat).
• 🌡️ Temperature: Heating above 45 is considered critical°C at rest.
• ⚡ Charge current: allows you to know whether fast charging works correctly.

System statistics will also show which apps consume the most power, and sometimes the problem is not the hardware, but the background process that keeps the phone awake.

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If the phone is very warm while charging, remove the case and put it on a hard surface – this will help to avoid bloating the battery.

Using AIDA64 for accurate data

When there's not enough built-in tools, specialized tools come to the rescue, and one of the most reliable tools for Android is the AIDA64 app, which reads data directly from the power controller.

Once installed, run the app and go to Battery, where you'll see Health, which shows residual capacity as a percentage of the factory capacity, and where you'll see the exact chemistry of the element and the design capacity.

It is important to understand that applications show data that the battery controller itself transmits, and if the controller has not updated the data after replacement or reset, the readings may be inaccurate, in which case a full discharge and charge cycle is required.

Section: Battery


Technology: Li-ion




Temperature: 32.0 C




Voltage: 4.20 V




Level: 100%

Compare the design capacity with the passport capacity, and if the difference is greater than 20%, the device becomes uncomfortable and, in rare cases, unsafe.

Checking status through computer and ADB

For PC users, the most professional method is to use the Android Debug Bridge (ADB) debugging tool, which allows you to access system logs that are hidden from regular applications.

First, you need to enable USB debugging in the Developer menu, connect your phone to your computer, open the command line, and type a command to get full battery status.

adb shell dumpsys battery

In the lead, find the line health: the number "2" stands for good, "3" stands for overheating, "4" stands for discharge, and other values may indicate controller errors, and you can see the exact scale and level values.

This method is especially useful if the phone behaves strangely: it discharges quickly, but programs show normal wear and tear. ADB helps to see the “raw” data, bypassing the system’s software filters.

⚠️ Attention: To work with ADB Xiaomi drivers are required USB Driver. Make sure that the computer has the current version installed, otherwise the device will not be determined.

Visual Diagnostics and External Signs

You don't always need software to know if the battery is out of order. The physical state of the case and the behavior of the device often speaks volumes more than any number.

A billowing battery is the most dangerous malfunction. If you notice that the back cover has moved away, the screen has started to bulge out of the frame, or the phone has stopped lying flat on the table (spinning when rotating), stop using immediately.

Also, pay attention to the charging speed. If the smartphone used to charge in an hour, and now the process takes 3-4 hours with a proper power supply, this is a sign of high internal resistance of the cell.

• 📉 Dramatic jumps: charge drops from 40% to 5% in minutes.
• 🔌 Spontaneous shutdown: the phone goes out in the cold 20-30% charge.
• 🔥 Heating: The lower part of the body is hot even on simple tasks.

Visual examination is the first stage of diagnosis, and if you find bloating, don't try to prick the battery or charge it "to finish off."

Comparative table of diagnostic methods

To make it easier for you to choose the right way to test, we have organized the methods in a table, each of which has its own advantages depending on your goal and level of training.

Use this table as a cheat sheet. There's enough engineering menus to check quickly, and AIDA64 or ADB are best for making a replacement decision.

Recommendations for extension of service

After checking and possibly replacing the battery, it's important to follow the rules of operation so that the new cell lasts as long as possible.

Try not to drain your phone to zero regularly. The optimal range for energy storage is from 20% to 80%. Modern charge controllers at Xiaomi are able to optimize overnight charging, stopping the process by 80% and reaching up to 100% by your wakeup.

Avoid using your phone while charging fast, as it causes additional heat.High temperature is the main enemy of battery chemistry, leading to irreversible loss of capacity.

⚠️ Warning: Don't use cheap chargers without certificates.Potency surges can damage the power controller on the motherboard, costing more than replacing the battery.

Compliance with these simple rules will allow you to maintain the declared capacity of the battery for several years of active operation.

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Regular diagnosis of battery status helps prevent sudden shutdowns and extend the life of the smartphone for 1-2 years.

Frequently Asked Questions (FAQ)