Xiaomi smartphone owners often face the need to assess the state of the power system of their device. Redmi 8 Pro, despite its popularity, is no exception, and over time, autonomy can decline. To know the exact charge figures without using third-party equipment is quite possible, if you know where to look in the system.
There are several ways to access hidden battery data, from simple codes to complex engineering tests. In this article, we’ll look at how to find out the nominal and actual capacity to understand whether a battery replacement or calibration is required, which will help you avoid buying unnecessary accessories and extend the life of the gadget.
It's worth noting that standard Android settings don't always show complete data. To get detailed statistics, you'll need to activate additional modes or use specialized software. Let's look at all the available methods in detail.
Staff diagnostics MIUI
The easiest way to get the basic information about battery status is to use the built-in safety application. MIUI (or HyperOS) already has wear-and-wear monitoring tools in it. Go to Settings and find the Battery and Performance section, and it shows the discharge graph and the list of the most energy-intensive applications.
However, for a deeper analysis, it is better to use the engineering test menu ##6485##. It opens a hidden interface where you can see a lot of parameters. MB_06 — It shows the state of the battery (Good, Bad, Overheat).
You may also be interested in the parameter. MB_00, which shows the current percentage of charge, and MF_02, This data will give you a general idea of how worn your Redmi is. 8 If the status is "Good" but the phone is discharged quickly, the problem may be in the software.
⚠️ Warning: Do not change the values in the engineering menu unless you know exactly what they are responsible for. Resetting the cycle counters can lead to incorrect display of percentages of charge.
Use of third-party applications
If built-in tools aren't enough, Google Play's dedicated tools will come to the rescue. AccuBattery is considered the gold standard for diagnostics. It not only reads data, but also calculates real capacity based on monitoring charging and discharging processes.
After the AccuBattery is installed, you need to run several charging cycles from 15% to 80-90%, collect statistics and show the real capacity in mAh, comparing it with the declared manufacturer, which allows you to see the percentage of wear of the battery in numbers.
Another useful tool is Ampere, which shows real-time charging and discharging currents, can detect problems with a power controller or poor-quality cable that affect the rate of energy replenishment, and it is recommended to use the original power supply for accurate measurements.
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To get accurate data in AccuBattery, use your phone as normal for 3-5 days. Do not try to force the process by artificially discharging the device to zero.
You can't trust applications that promise to "restore" a battery in a few clicks, but software can only calibrate the controller, but it can't eliminate the physical wear and tear of a chemical element.
Checking through ADB and computer
For advanced users who are not afraid of the command line, there is a method of checking through the ADB (Android Debug Bridge, which allows you to pull out the most detailed information that is hidden from the average user, USB-cable and installed drivers ADB.
First, you need to activate USB debugging mode on your smartphone. Go to Settings → About Phone and click on the MIUI build number seven times. After you see the "You became a developer" sign, go to Advanced Settings → For developers and turn on Debugging over USB.
adb shell dumpsys batteryThis command will show the current battery status, charge level and health status, and you can use the command to get more detailed information about the capacity:
adb shell dumpsys batterystats --chargedThe result will be presented as a text log. Look for lines that contain capacity or current capacity. The good thing about this method is that it reads data directly from the kernel system logs, avoiding possible interface errors. However, interpreting data may require additional knowledge.
What to do if your computer can’t see your phone?
Analysis of system logs and charging cycles
The number of recharge cycles is a key indicator of battery life. The Lithium polymer batteries installed in the Redmi 8 Pro are designed for about 500-800 full cycles before significant degradation.
In the engineering menu (code ##6485##) parameter MF_02 It shows the number of cycles that have been traveled. 500 It's more or less than that, and the autonomy has gone down, and that's a direct signal to replace it.
Parameter MB_03 The same menu shows the current voltage. The normal value is a value in the range of 3.7Into 4.4Depending on the level of charge, sudden jumps or too low voltage at a high percentage may indicate cell degradation.
| Parameter | Description | Normal value. |
|---|---|---|
| MB_06 | Battery status | Good |
| MF_02 | Charging cycles | < 500 |
| MF_05 | Residual receptacle | > 80% of the denomination |
| MB_03 | Tension. | 3.7B - 4.4B |
And by comparing this data to a table, you can easily diagnose the state of the power grid (MF_05) much lower than the estimated, the program calibration will not help.
Visual and tactile diagnosis
It doesn't always take sophisticated software to figure out what's wrong with the battery. Physical signs often speak more eloquently than numbers. A bloated battery isn't just a defect, it's a danger. If the Redmi 8 Pro's back cover starts to recede or the screen goes up, stop using immediately.
Also note the heat. If the phone warms heavily in the camera or lower body area even when it is down, it may indicate an internal short circuit or high internal battery resistance. Normal heating is only allowed for heavy games or fast charging.
⚠️ Warning: A billowing battery may ignite or explode. Do not try to prick it or put it under the press. Replace it at a certified center.
Another sign is a sharp spike in the percentage of charge, like the phone is 20 percent, you put it in your pocket, and 10 minutes later it turns off at zero, which is a sign that the controller can't read the residual capacity correctly because of the wear and tear of the chemistry.
☑️ Signs of need for replacement
Battery calibration: myth or reality?
Many users have heard of battery calibration, which involves completely discharging the device before turning it off and then charging it to 100% without interruption, which is thought to help the controller remember the actual limits of the capacity.
On modern Xiaomi smartphones with BMS (Battery Management System) controllers, this method works poorly. The system itself constantly adjusts the readings, however, if you notice that the percentages are floating, you can try the full cycle: discharge to 0%, turn off, charge to 100%, then turn on and finish the charge.
You don't have to do this often. Deep discharge is bad for lithium batteries. Do this procedure no more than once every six months, and only if you see obvious glitches in the display of charge. Otherwise, you'd better just use your phone as normal.
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Calibration helps correct percentage display errors, but does not restore the physical capacity of the worn-out battery.