Xiaomi smartphone owners often face the need to check the current state of the battery, especially if the device has been in use for more than a year. the standard interface MIUI or HyperOS does not always show detailed information about real wear, charging cycles and exact capacity in milliamp-hours. That is why the question of how to look at the battery on Xiaomi, remains one of the most popular among users who want to extend the life of their gadget.
There are several proven ways to access this information, from using built-in engineering menus and secret codes to installing specialized utilities, in this article we will examine each method, explain how to interpret the data, and suggest at what indicators you should consider replacing a battery, you will learn where hidden tests hide and how to distinguish software failure from physical battery degradation.
Using secret codes for diagnosis
The fastest way to access hidden parts of the system is by using the USSD-In the firmware. MIUI There is a special engineering mode that allows you to start testing hardware components, including the battery. To start, you need to open the Phone application and dial the combination ##6484#. If the code is entered correctly, the menu will automatically open on the screen. CIT (Customer Information Test).
The list that opens will show you the battery item, which is usually called the Battery or the Hardware test, and when you log in, you'll be asked to run an automatic test that will check voltage, current charge and connection status, and it's important to understand that this menu is for the initial factory diagnosis, so it may not show the exact percentage of wear, but it will help you identify critical controller errors.
⚠️ Note: Do not try to change the settings in other sections of the engineering menu CIT, If you're not sure what they're doing, random activation of some functions can cause sensors to malfunction or reset the screen.
What if the code doesn't work?
Checking through the About Phone menu and battery status
A safer and more informative method for the average user is the standard settings menu. While Xiaomi hides detailed technical data, basic status information can be found in Settings → Phone → All settings. This shows the total capacity and current charge level, but for a deep analysis you need to go deeper.
Newer versions of HyperOS and MIUI 14 have a battery status display feature. Go to Settings → Battery and click on the gear icon or three dots in the corner of the screen. If the system supports this feature, you will see a “Normal State” status or a service alert. However, this indicator is often too optimistic and does not reflect the actual drop in capacity.
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For a more accurate assessment in the standard menu, try several times in a row to click on the item "Kere Version" or "Version". MIUI» Sometimes this opens up hidden error logs where you can find data on the battery overheating.
Log analysis via ADB and computer
For those who are not afraid of the command line and want to get the most accurate data without installing third-party software on the phone, the method using the use of the device is ideal. ADB (Android Debug Bridge. This way you can unload the system log battery_history, It's a computer that contains the entire history of the charging and discharging cycles, USB-cable and on-line debugging USB smartphone.
Once you connect the device to your PC and install the drivers, open the terminal or command line. Enter adb shell dumpsys batterystats --charged. The system will produce a huge amount of data. We're interested in Current capacity and Design capacity. Dividing the former by the latter and multiplying by 100 will give you a real percentage of battery health.
adb shell dumpsys batterystats --charged | findstr "capacity"The good thing about this method is that it reads data directly from the power controller, bypassing the software filters of the shell, but interpreting numbers can be difficult for a beginner, since values can be output in different units of measurement.
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The ADB method gives the most objective picture of wear, since the data is taken from the system logs of the Android kernel, which cannot be faked by software methods.
Third-party monitoring applications
If you don't want to mess with codes and a computer, Google Play has been a leader for years, and it's based on a statistical aggregation principle: it doesn't know the exact capacity of your battery initially, but it analyzes the charging and discharging speed in real time.
To get an accurate result, it is necessary:
- 📱 Install the application and provide all the permissions requested.
- 🔋 Conduct several full charging cycles (15 to 100%) in normal use.
- 📊 Through 3-5 days of use go to the tab "Health" and see the estimated capacity.
Other popular utilities, such as AIDA64 or CPU-Z, show data that the system itself provides. If Xiaomi's firmware hides real wear, these programs will also show 100% health even if the battery is worn out. So AccuBattery remains the preferred choice precisely because of the real-capacity emulation algorithm.
Visual inspection and physical signs of wear
Sometimes software methods are not needed, because the wear of the battery is obvious from the outside. Lithium polymer batteries used in Xiaomi can deform over time. If you notice that the back of the smartphone has started to move away from the case or the screen has slightly raised, this is a sure sign of battery bloating.
Bloating occurs due to the accumulation of gases inside the battery as a result of chemical reactions, it is strictly forbidden to operate such a device, since a damaged battery can catch fire or completely fail at any time, and you should also pay attention to the discharge rate: if the phone loses 10-15% of charge per hour in standby mode, this is a signal of deep cell degradation.
| Sign. | Description of the problem | Recommended action |
|---|---|---|
| Bloating of the hull | Physical expansion of the battery | Urgent replacement, no charge! |
| Sharp spikes % | Fall from 40% to 5% in minutes | Calibration or substitution |
| Charging heating | Temperatures above 45°C | Controller inspection |
| Shutdown in the cold | Shutting off at -5°C and above | Battery replacement |
Battery calibration: myth or reality?
Many users, when they find a percentage mismatch, use calibration to completely discharge the phone before it turns off, followed by charging up to 100% when it's off, which is thought to help the power controller "remember" the actual limits of the capacity.
But the current power controllers in Xiaomi smartphones are smart enough to constantly adjust their readings. Software calibration is most often needed not by the battery itself, but by an operating system that does not correctly display the remaining energy. If the problem with jumping percentages persists after a full recharge, most likely, the physical resource of the battery is exhausted.
☑️ Checklist of correct calibration
When is it time to change the battery?
The resource of a modern lithium-polymer battery is on average 500-800 And then the battery will keep about the same amount of charge-discharge. 80% If the applications or tests show the battery's health is lower 80%, If the phone stops holding charge during the working day, it is a direct signal to replace the phone.
Don't wait to replace if you notice that the phone is starting to throttling to save power. This is a common practice in Android systems: when a weak battery is detected, the system artificially limits power to prevent sudden shutdowns under load, replacing the battery in this case will return the device to its previous speed.
⚠️ Note: When you replace your battery at an authorized Xiaomi service center, you retain the warranty for water protection (if it was claimed) and get the original battery. Cheap analogues may not have protective controllers, which increases the risk of fire.