The battery is the most vulnerable component of Xiaomiβs smartphone, which degrades even under ideal operating conditions. After 2-3 years, battery capacity can drop by 30-40%, leading to a sharp drop in autonomy, sudden shutdowns and charging problems. But how exactly do you know how worn your Redmi, POCO or Mi battery is? The official Android settings do not show this information, and the data from the battery menu is often misleading.
In this article, weβll look at 5 proven ways to check Xiaomi battery wear, from hidden engineering menus to third-party apps with detailed diagnostics. Youβll learn what indicators are considered critical, how to decrypt data from service codes and what to do if the battery is worn out by 50% or more. All methods are tested on models from 2019-2026 and work without root rights.
β οΈ Important: Battery wear may vary depending on ambient temperature. For accurate measurements, check at room temperature (20-25Β°C) and the level of charge 30-70%.
1. Check through the engineering menu (#4636##)
The fastest way to get data about the battery is to use the hidden engineering menu of Android.This method works on all Xiaomi smartphones regardless of the model and version of MIUI, but requires caution: do not change the settings in other sections of the menu, so as not to disrupt the system.
To open the engineering menu:
- Open the Phone app.
- Enter the combination: ##4636## (some models may require code ##6484##).
- Select Battery Information (Battery Information).
In this section, pay attention to the following parameters:
- π Level of charge (level) - current percentage of charge.
- π Voltage β should be in the range of 3.7-4.2 V for lithium-polymer batteries.
- β‘ Temperature - optimally 20-40Β°C. Exceeding 45Β°C accelerates degradation.
- π Health - If Good is indicated, wear is minimal. Replace soon or Dead signals critical wear.
β οΈ Attention: On some firmware MIUI (especially global) item State may not be available. In this case, use alternative methods from the following sections.
π‘
If the engineering menu doesnβt open, try entering the code through Googleβs Dial-Up app (install it from Play Market).
2.Use of service code ##6484## for Xiaomi models
Xiaomi smartphones have a unique service code that displays advanced battery information, including real capacity and number of charging cycles. This method works on most devices in the Redmi Note series, POCO X/F and flagship Mi/Xiaomi.
Instructions:
- Open the standard phone application.
- Enter the code ##6484## (on some models, #668###).
- In the menu, select Battery Test or MBAT Test.
In the test results, pay attention to:
- π Full Charge Capacity (FCC) β current maximum battery capacity in mAh.
- π Cycle Count is the number of complete charge cycles. >500 battery is considered to be very worn out.
- π Design Capacity β factory capacity (e.g., 5000 mAh for Redmi Note 12 Pro)+).
To calculate the wear, use the formula:
Wear (%) = (1 - FCC / Design Capacity Γ 100)Example: If FCC = 3800 mAh and Design Capacity = 5000 mAh, then wear will be 24%.
What if the code doesn't work?
3. Diagnostic applications: AccuBattery, CPU-Z and MIUI Battery
If service codes don't work or you want more detailed statistics, use third-party apps that analyze data from the battery controller and provide degradation graphs, temperature profiles, and autonomy forecasts.
Top.-3 applications to check the wear of the Xiaomi battery:
| Annex | Advantages | Deficiencies | Reference |
|---|---|---|---|
| AccuBattery | It shows real capacity and wear in percent. It tracks charging cycles. It gives recommendations for extending life. | Requires calibration (2-3 charging cycles). | Play Market |
| CPU-Z | It shows voltage, temperature and condition. It works without the Internet. | No per cent wear calculation. | Play Market |
| MIUI Battery | Optimized for Xiaomi, showing charging cycles and discharge history. | No support for older models (until 2020). | AppGallery |
β οΈ Note: AccuBattery applications take time to collect data. Use them for at least 3 days for accurate results, performing full charging cycles (0-100%).
Discharge your phone to 0% and charge to 100% without interruption | Turn off battery optimization for the application in MIUI settings |Do not use fast charging during the test |Repeat the cycle 2-3 times for accuracy-->
4. Verification through ADB: for advanced users
If you want the most accurate data, you can get battery information through Android Debug Bridge (ADB).This method is suitable for users familiar with the command line and allows you to unload the full battery logs, including cycle history and current capacity.
Instructions:
- Install ADB Tools on your PC.
- Turn on USB Debugging on your smartphone (Settings β About Phone β MIUI version β press 7 times, then go back to Additional Settings β For Developers).
- Connect your phone to your PC and execute the command: adb shell dumpsys battery
In the conclusion of the team, pay attention to:
- π charge counter - current capacity in ΞΌAh (divided by 1000 to get mAh).
- π Cycle count β number of cycles.
- π capacity - factory capacity.
Example of conclusion:
level: 78
scale: 100
voltage: 3987
temperature: 310 (31.0Β°C)
current now: 120000 ΞΌA
charge counter: 3800000 ΞΌAh
capacity: 5000000 ΞΌAhIn this case, the wear will be 24% (3800 mAh vs. 5000 mAh).
Critical battery wear (over 50%) can cause sudden shutdowns at 20-30% charge due to incorrect calibration of the controller, in which case a battery replacement is required.
5. Visual signs of wear and tear of Xiaomi battery
If you don't have the software, look for indirect signs of battery wear and tear, and they can help you identify the problem even without the tools.
Alert signals:
- β‘ Fast discharge β the phone loses 20-30% charge-by-charge 15-20 minutia.
- π₯ Overheating - the body is heated over 40Β°C when charging or using the camera.
- π Sudden shutdowns β the phone turns off when 15-40% charge and only activated after connection to charging.
- π Increased charging time β a full cycle takes more than 3 hours (with a serviceable power supply).
- π Battery bloating β the screen or back cover begins to βstep awayβ from the body.
β οΈ Warning: If the battery is swelling, stop using the phone immediately! Lithium polymer batteries in this state can ignite. Contact Xiaomi Service Center for a replacement.
π‘
A bloated battery is not only a risk of fire, but also damage to the internal components of the smartphone (display, motherboard), which is cheaper to replace than repair after a short circuit.
What to do if the battery wears more than 50%?
If the diagnosis showed wear and tear of more than 50%, the battery is considered critically worn, in which case, you can observe:
- Decrease in autonomy by 2-3 times compared to the new battery.
- The risk of sudden shutdown at low charge.
- Increase the charging time to 4-5 hours.
Options for a solution:
- Battery replacement: π οΈ Xiaomi official service - 6 months warranty, original components. π§ Unofficial workshops are cheaper, but the risk of poor-quality batteries.
Replacement cost: 1500β4000 β½ Depending on the model (for example, for the Redmi Note 11 Pro β ~2500 β½, Xiaomi 13 Ultra β ~4000 β½).
Optimization of use
- π΅ Turn off the background activity of applications (Settings) β Battery β Optimizing the battery).
- π‘οΈ Avoid overheating (do not use your phone in the sun or while charging).
- π Charge up to 80% (use Optimized Charging in the phone) MIUI).
After replacing the battery, be sure to calibrate: discharge the phone to 0%, then charge to 100% without interruption. Repeat the procedure 2-3 times.