The battery is one of the most vulnerable components of a smartphone, and over time, its capacity inevitably declines, leading to rapid discharge, sudden shutdowns and charging problems, especially for Xiaomi, Redmi and POCO devices, where the manufacturer often installs batteries with high energy density but limited charging cycle life.
In this article, you will learn how to independently check the degree of battery degradation on any Xiaomi smartphone, from the budget Redmi Note to the flagship Mi 13 Ultra. We will analyze the official and hidden diagnostic methods, learn how to decipher technical data and determine when it is time to change the battery. All methods are tested on the current MIUI 14/15 and HyperOS firmware.
Why is Xiaomiβs battery degrading faster than other brands?
Xiaomi has traditionally used high-energy lithium polymer batteries, but saves on cooling and charging optimization, leading to several key problems:
- π₯ Overheating: thin body and lack of active cooling accelerate battery wear during heavy use (games, video, navigation).
- β‘ Fast Charge: Fast Charge Technology (33W/67W/120W) shorten the service life 15β20% high-current.
- π± Aggressive optimization MIUI: Background processes and application auto-runs increase the number of charging cycles.
- π Low-quality controllers: in budget models (Redmi) 9A, POCO M3) Often set up simplified food management schemes.
According to Counterpoint Research, the average battery life of Xiaomi smartphones is 2-2.5 years when used actively, while Samsung or Apple have this figure as high as 3-4 years.
Method 1: Checking through a hidden menu of engineering codes
The fastest and most accurate method is the use of service USSD-It works on all Xiaomi models, including the old ones (Mi). A1, Redmi 4X) and new (Xiaomi 14, POCO F6).
Instructions:
- Open the Phone app.
- Enter the code ##4636##
- In the menu that appears, select Battery Information.
- Pay attention to the parameters: Level - current charge in percentage. Voltage - voltage (normal: 3.7-4.2 V). Temperature - temperature (optimally: 25-35 Β° C. Health - the main indicator: displays the remaining capacity as a percentage of the factory.
If there is no Health field, use an alternative code:
##284##POCO
Redmi
Check the correctness of the input (without spaces)
Reboot your smartphone
Update MIUI to the latest version
Try entering the code through the Emergency Call app-->
β οΈ Note: Some firmware (especially global ones) may have the engineering menu blocked. In this case, use method 3 or 4.
Method 2: Diagnostics through AccuBattery
AccuBattery is one of the most accurate third-party applications for analyzing battery status, and it not only shows current capacity, but also calculates the number of charging cycles, temperature and wear rate.
How to use:
- Download AccuBattery from Google Play.
- Launch the app and give you access to battery statistics.
- Go to the Health tab.
- Pay attention to this: π Battery health β percentage of factory capacity. π Charging cycles β the more, the stronger the wear (normal: up to 500 cycles). π‘οΈ Temperature - critical value: above 40Β°C.
Example of the report for Xiaomi Redmi Note 12 Pro+ after 1.5 years of use:
| Parameter | Meaning | Norma. | Status |
|---|---|---|---|
| Capacity | 4200 mAh | 5,000 mAh | β οΈ 84% (wear and tear 16%) |
| Charging cycles | 387 | 500 | β Norma. |
| Temperature. | 38Β°C | 25β35Β°C | β οΈ Elevated. |
| Tension. | 3.9 B | 3.7β4.2 | β Norma. |
The critical capacity is below 70%, and with this wear, the battery starts to run out in 2-3 hours, even in standby mode, and the smartphone can shut down at 15-20% charge.
π‘
If AccuBattery is above factory capacity (e.g., 5200 mAh instead of 5000), it's a calibration error. Reset the stats in the app settings and charge the phone to 100% without interruption.
Method 3: Analysis with MIUI Battery Care (for new models)
Starting with MIUI 13 and HyperOS, Xiaomi has added a built-in battery monitoring tool, Battery Care, which is available on flagship models (Xiaomi 13/14, Mix Fold) and some Redmi Note 12 series devices.
How to turn on:
- Go to Settings. β Battery.
- Slap the icon. βοΈ (In addition) in upper right corner.
- Choose Battery Care (Battery Care).
- Activate the Battery Health Monitor option.
β οΈ Note: Battery Care may not be available on budget models (Redmi) 10A, POCO M5) region-wise India/Global. In this case, use AccuBattery.
Method 4: Checking through ADB (for advanced users)
If standard methods don't work, you can get battery data through the Android Debug Bridge (ADB), which requires a computer but gives you the most accurate information, including the number of charging cycles and the actual voltage.
Instructions:
- Install ADB Tools on your PC.
- Turn on USB Debugging on your smartphone: Settings β About Phone β MIUI Version (tap 7 times), then Settings β Additional β For Developers β Debugging over USB.
- Connect your phone to your computer and execute the command: adb shell dumpsys battery
- Find the line in the output: capacity - current charge in %. voltage - voltage in ΞΌV (divided by 1000 charge counter - the real capacity in mkAh (divided by 1000 for mAh). cycle_count β charge-cycle.
Example of output for Xiaomi 12T:
level: 85
Voltage: 4123000 (4.123 V)
charge counter: 3800000 (3800 mAh)
cycle_count: 214Compare the charge counter to the factory capacity (indicated on the battery or in the model specifications). For example, if the factory capacity is 5000 mAh and the charge counter shows 3800 mAh, the wear is 24%.
How to find out the factory capacity of the battery?
Method 5: Visual Diagnostics and Indirect Signs of Wear
If you canβt use programs or codes, pay attention to the indirect signs of battery degradation:
- β‘ Fast discharge: the phone loses 10-15% of its charge in 10-15 minutes on standby.
- π Unstable charging: the percentage of charge jumps (for example, from 50% to 30% per second).
- π₯ Overheating: the body heats up even with light load (social networks, instant messengers).
- π Sudden shutdowns: the phone turns off at 15-30% charge.
- π Long charging: from 0 to 100% charges more than 3-4 hours (with a serviceable power supply).
Also, check the battery visually (if you have access):
- π Bloating: Battery case deformed, screen or back cover raised.
- π§ Electrolyte darts: white or green traces on the board near the battery.
- π Oxidation of contacts: green plaque on metal connectors.
β οΈ Warning: If the battery is swelling or leaking, immediately turn off the phone and do not try to charge it! this may cause fire.
π‘
Even if the visually normal battery looks, its capacity could drop to a critical 60-70%. Use software diagnostics to accurately estimate.
Table of the norms of battery wear for Xiaomi
To understand how critical your battery wear is, compare the numbers with this table:
| Percentage of wear and tear | The remaining container | Signs. | Recommendations |
|---|---|---|---|
| 0β10% | 90β100% | No noticeable problems. | Continue to use as normal |
| 10β20% | 80β90% | Moderate discharge, possible jumps of charge | Watch the temperature, avoid fast charging |
| 20β30% | 70β80% | Fast discharge, overheating under load | Limit games and videos, consider replacing them |
| 30β50% | 50β70% | Sudden blackouts, the charge lasts 2-3 hours | Replacement recommended |
| >50% | <50% | The phone does not turn on or discharge in 1 hour | We need an urgent replacement! |
If your smartphone falls into the last two categories, delaying battery replacement is dangerous β it can cause damage to the motherboard or even fire.