Xiaomi, Redmi and POCO are all known for their high energy efficiency, but over time, even the most capacious battery starts to degrade. Users often notice that the device discharges faster than in the first month of use, or the percentage of charge behaves unpredictable: it jumps from 20% to 5% in a couple of minutes.
Monitoring battery health is not just a way to know how much energy is left, it's an important prevention tool. Knowing the exact wear and tear level (SoH), you can plan a battery replacement before it bills up or starts turning off the phone in the cold. In this article, we will discuss all available methods: from simple visual observations to complex engineering codes and technical methods. ADB-team.
There are several levels of verification: basic (for regular users), advanced (through hidden menus) and expert (using a computer), the choice of method depends on how deep you want to dive into the diagnosis of your Mi or POCO smartphone, the main thing is to use proven methods to avoid disrupting the system.
Basic setting of percentage display in MIUI and HyperOS
The most obvious, but often ignored, way is to turn on the digital display of charge. By default, many MIUI shells hide exact numbers, showing only the icon. To activate, go to the Settings menu, then select the Notifications and Status bar (or Lock Screen depending on the firmware version) and find the Battery Charge.
Once you turn on this feature, you can see an exact value, like 84% instead of an abstract picture, which allows you to more accurately track the discharge rate in real time, but it's worth remembering that the percentage displayed is a software calibration that can differ from the actual capacity of a chemical element.
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For more detailed real-time monitoring, turn on the developer mode and add the Monitoring widget to your desktop, which displays the consumption current in milliamperes.
In the newer versions of the HyperOS shell, the menu logic has changed a little. Now the path can look like Settings → Battery → Battery settings. If you can't find the right switch, search for settings by typing in "percentages." This is a versatile method that works on all models, from the budget Redmi Note to the flagship Xiaomi 14.
Use of engineering menus and secret codes
For more technical information about the battery status, you can use the built-in engineering menu, which is available through a special set of numbers in the Phone app. Enter the code ##6485##. If the code works, the Battery Info window will open, which contains important technical parameters.
In the list you are interested in the following lines:
- 🔋 MB_06 — battery-state (Good/Normal normalize).
- 📉 MB_00 — current charge level as a percentage.
- 🔌 MB_01 — battery voltage (in volts).
- 🌡️ MB_02 — current battery temperature.
⚠️ Note: Some global versions of the firmware MIUI This code can be blocked or redirected to the standard settings menu, in which case try the code ##4636##, although it is more commonly used to diagnose the network, sometimes contains tabs about nutrition.
It is important to understand that the engineering menu shows the current physical parameters, but does not always display the exact percentage of wear (charging cycles) explicitly, as specialized utilities do. MB_06 If it says “Bad” or “Overheat”, the system needs immediate diagnosis.
Diagnosis through ADB-Teams (for advanced users)
The most accurate way to get information about charging cycles and the real residue of the capacity is to use a debugging bridge. ADB (Android Debug Bridge: This method requires connecting your smartphone to your computer via a computer. USB-cable and availability of an installed driver ADB. Before you start, you need to activate the developer mode: seven times click on the build number in the About Phone section, then turn on Debugging by USB on the Developer Menu.
Connect the device to your PC, open the command line in the ADB folder, and enter the following command to check status:
adb shell dumpsys batteryThis command will output a detailed log that includes charge level, status, and health, but it often requires a command to get the exact number of Cycle Count cycles on Snapdragon and MediaTek processors:
adb shell cat /sys/class/power_supply/battery/cycle_countIf the command returns a number (e.g. 350), it means that your battery has gone through 350 full charge-discharge cycles, and a critical value is above 800 cycles, after which the capacity can fall below 80% of the nominal value.
What if the ADB can’t see the device?
Use ADB is safe if you are just reading the data. Do not try to change the battery settings with the adb shell dumpsys battery set unless you understand the consequences, as this can lead to incorrect display of charge and malfunction of the power management system.
Third-party wear analysis applications
When built-in tools are not enough, specialized applications from Google Play come to the rescue, AccuBattery is considered the leader in this niche, the principle of its operation is different from system utilities: it does not read “passport” data, but calculates the real capacity, analyzing the current flowing into the battery during charging and the current flowing during discharge.
To obtain accurate data with AccuBattery, you need to:
- 📲 Install the application and provide the necessary permissions.
- 🔋 Conduct several full charging cycles (preferably from 15% to 100%).
- 📊 Wait for statistics to be collected (usually) 3-5 day-to-day).
Other popular utilities, such as Battery Guru or 3C Battery Manager, can also provide detailed information, but it is worth considering that on new versions of Android, access to battery system files is limited, so applications can show less accurate data without root rights.
⚠️ Warning: Avoid apps with names like Battery Saver or Clearer that promise to “accelerate charging” and that can’t physically change the rate of chemical reactions and often just clog up your memory with ads to speed up the discharge.
☑️ Checking of a third-party application
Comparative table of diagnostic methods
To make it easier for you to choose the right way to test, we have systematized the diagnostic methods in the table below, each method has its advantages and limitations depending on your Xiaomi model and software version.
| Method | Accuracy of data | Difficulty | Do I need a PC? |
|---|---|---|---|
| MIUI settings | Low (only per cent) | Very easy. | No. |
| Engineering code (##6485##) | Medium (status, voltage) | Easy. | No. |
| Annexes (AccuBattery) | High (real capacity) | Average (time required) | No. |
| ADB-team | Maximum (cycles, mAh) | Hardly. | Yes. |
As you can see from the table, a code is enough to quickly check the status of “Good”, but to assess the real capacity loss (for example, there is 2800 mAh left instead of 4000 mAh), it is better to use a bundle of applications or ADB.
Calibration of the battery and elimination of error indication
Sometimes the problem is not physical wear, but the power controller and the software indicator are out of sync, and the phone can turn off 20% and then abruptly, and calibration helps, and this process allows the system to re-determine the boundaries of full charge and full discharge.
The calibration procedure is as follows:
- Discharge the smartphone before completely switching off (0%).
- Try turning it on again; if it is turned on, discharge it further until it stops responding to the button.
- Put the device off to charge up to 100% (the indicator will light up).
- Do not turn on your phone, keep on charging for another 1-2 hours after reaching 100%.
- Turn on your phone (without turning off the charger) and check the level. If it's less than 100%, get it full.
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Calibration does not restore the physical capacity of the worn-out battery, but corrects the percentage display errors, making the indication honest.
Repeat this procedure is often not recommended, since deep discharge is harmful to lithium polymer cells, it is enough to perform a calibration once after updating the firmware or with obvious glitches of the indicator.
Factors accelerating battery degradation
Understanding how (to view) the residue is less important than understanding why that residue is shrinking. 800-1000 It's a cycle, but misuse can cut that time by half. The main enemy is heat. Using a navigator in the sun or playing hard while charging heats the body higher. 40°C, which irreversibly destroys the chemical composition.
Storing your device at 0% or 100% charge for a long time is also negative.If you put your phone in the closet for a month, the optimal charge for storage is about 50-60%. Constant operation from the network (passport desk mode) is also harmful, although new Xiaomi models have an optimized charging feature that limits the charge to 80%.
Use only original chargers or certified analogues with support for Quick Charge or Power Delivery protocols. Cheap power supplies can give off unstable voltage, which leads to overheating of the power controller and accelerated wear.