The battery is one of the most vulnerable components of a smartphone, and Xiaomi is no exception. Over time, battery capacity decreases, leading to rapid discharge, sudden blackouts and charging problems. But how exactly do you know how worn your Redmi, POCO or Mi battery is? Android's official settings hide this information, and manufacturers often underestimate the real numbers.
In this article you will find 7 We'll look at the proven ways to diagnose the battery, from hidden engineering menus to third-party applications, how to decipher the technical parameters, which values are considered normal and which signal the need to replace. 12/13/14, Redmi Note 10/11/12 and POCO F/X, where the verification procedure may differ.
Important: battery life affects not only battery life, but also performance, for example, when you wear more than 30 percent, the system starts to artificially limit the power of the processor to avoid overheating, which leads to lag in games and slow interfaces.
1. Hidden Engineering Menu ##4636## - Basic Diagnostics
The fastest way to get data about a battery is to use hidden service code, which works on most Xiaomi models without root rights or additional applications.
Open the phone application and enter the combination:
##4636##After dialing, the Testing menu will open. Go to the Battery Information tab, and here you will see the key parameters:
- π Charge level β current percentage in digital form (may differ from the indicator in the status bar).
- π Power supply: Battery (from battery) or USB/AC (charge-free).
- π State: Charging (charged), Discharging (discharged) or Not charging (charging problems).
- β‘ Voltage is normal for Xiaomi when fully charged: 4.35-4.45 V. If below 4.2 V, the battery is severely worn out.
- π₯ Temperature - optimal range: 25-40Β°C. Exceeding 45Β°C critically!
Note that this menu does not contain any wear data (capacity per mAh) and you will need other methods described below.
β οΈ Note: Some Xiaomi models (e.g. Mi 11 Ultra or Redmi) K50) The code ##4636## can be blocked, in which case use an alternative method via Settings. β The phone. β Version. MIUI (tap 5 times in a row).
Code ##6484## - Advanced battery information (MIUI 12+)
For devices on MIUI 12 and later (including Xiaomi 13/14, Redmi Note 12), a special code is available that shows the real battery capacity and the degree of wear.
Enter the dialer:
##6484##In the MBT INFO menu that opens, look for the Battery block, and there are two things that matter.
- π Battery Capacity (mAh) is the current capacity. Compare it to the passport (for example, for Redmi Note 11 it is 5000 mAh).
- π Battery Health is the percentage of wear and tear, and a 90 percent value means that the battery has lost 10 percent of its capacity.
An example of a decryption for POCO F4:
| Parameter | Meaning | Interpretation |
|---|---|---|
| Battery Capacity | 4500 mAh | Passport capacity is 5,000 mAh. 10% lost. |
| Battery Health | 88% | Wear 12%. Replacement is recommended at <80%. |
| Voltage | 4.38 In | Normal for full charge. |
| Temperature | 38Β°C | Value allowed (maximum 45Β°C). |
β οΈ Note: Some firmware (e.g. global) MIUI EU) code ##6484## may not work. ADB (Section 4) or applications from Google Play.
Charge your phone to 100% | Turn off charging and wait 5 minutes | Record voltage and temperature readings | Compare capacity to passport-->
3.AccumBattery application - detailed wear analysis
If you don't have any engineering menus, use the free AccuBattery app (available on Google Play), which not only shows current wear and tear, but also tracks battery degradation rates, temperature and charging cycles.
How to use:
- Install and open AccuBattery.
- Go to the Health tab.
- Wait for the application to collect data (usually 1-2 charge cycles).
- Please note the Estimated Capacity parameter.
What do indicators mean?
- π’ 90-100% battery in excellent condition.
- π‘ 80-89% - noticeable wear and tear, but no replacement is required.
- π΄ Less than 80 percent is critical wear. Sudden shutdowns are possible.
The advantage of AccuBattery is that it shows real charge cycles (rather than the calculated ones, like the engineering menu). For example, if you charge a phone from 20% to 80%, it counts as 0.6 cycles, not 1.
π‘
In AccuBattery settings, enable the βHigh Temperature Warningβ option to help avoid overheating the battery during charging or gaming.
4. Verification through ADB (for power users)
If you want the most accurate data, use ADB (Android Debug Bridge), which requires connecting your phone to your computer, but gives you access to hidden settings that don't show the apps.
Instructions:
- Download and install ADB Tools on PC.
- On the phone, turn on Developer Mode (7 times tap the MIUI version in the settings) and activate Debugging over USB.
- Connect the phone to your computer and type in the command line: adb shell dumpsys battery
- Find the lines of capacity, voltage and temperature.
Example of output for Xiaomi 12T:
current now: 4500000 ΞΌA (real capacity)
capacity: 90 (percentage of wear)
Voltage: 4380 mV (4.38 V)
temperature: 380 (38Β°C)Transcript:
- current now is the current capacity in microamps (divide by 1000 to get mAh).
- Capacity is the percentage of the original capacity.
- Voltage is the voltage in millivolts.
β οΈ Attention: Use ADB Do not enter other commands than those given, which can cause the system to crash. If you are not sure, skip this method.
What if the ADB does not recognize the device?
5. Hidden CIT menu β for models with Snapdragon processor
Xiaomi devices on Qualcomm Snapdragon chips (e.g. Redmi K60, POCO F5) have a hidden CIT (Certification Test Mode) menu where you can check the battery without third-party applications.
How to open it:
- Enter the dialer: ##7764726##
- Select Battery Information.
- Take note of Battery Capacity and Battery Health.
Features of this menu:
- π Shows an accurate container with an error of no more than 1%.
- π Displays the discharge graph for the last 24 hours.
- β‘ Checks charging speed (useful for diagnosing fast charging problems).
Example: if the CIT menu says Battery Health: 75%, it means that the battery has lost 25% capacity and needs to be replaced soon.
π‘
The CIT menu is only available on Snapdragon-powered devices, and on phones with MediaTek chips (like the Redmi Note 12 4G), this method doesnβt work.
6. Diagnostics via Mi Flash Tool (for firmware and repair)
If you are planning to replace your battery or install your device, use the official Mi Flash Tool, which shows detailed information about components, including the battery.
How to check:
- Download the Mi Flash Tool and connect your phone in Fastboot mode (clip Volume Down + Power when the device is off).
- Select Advanced β Battery Info.
- Look at the Design Capacity and Full Charge Capacity options.
Advantages of this method:
- π§ Shows the battery serial number - useful for checking originality.
- π Displays the number of full charging cycles.
- π Allows you to reset calibration data (if the phone does not show the percentage of charge incorrectly).
β οΈ Note: Using the Mi Flash Tool requires an unlocked bootloader. Wrong actions can lead to a device blink (breakdown.
7.External signs of battery wear - when it's time to change
Even without special tools, you can suspect battery problems on indirect grounds.
- π The phone discharges by more than 20% per hour in standby mode (without active use).
- β‘ Charging is slower than usual (for example, from 0% to 100% in 3).+ One hour of using the original scoring).
- π₯ The phoneβs body gets very hot during charging or gaming.
- π The percentage of charge "jumps" (for example, from 30% immediately to 10%).
- π₯ The phone turns off when 10-20% of the remaining charge is.
- π Charging is interrupted (writes "Not original charger" even with the original RAM).
If you see at least 2-3 of these signs, the probability of battery wear is greater than 50%, in which case it is recommended to diagnose one of the methods described above.
Battery monitoring on fast-charging models (33W, 67W, 120W) is particularly critical, as they warm up more. For example, on the Xiaomi 13 Pro or Redmi Note 12 Turbo, wear can reach 15-20% after a year of heavy use.
π‘
If the phone suddenly shuts down at 10-15% charge, try calibrating the battery: completely discharge the device before turning off, then charge to 100% without interruptions. Repeat the procedure 2-3 times.