The battery is one of the most vulnerable components of Xiaomi’s smartphone, which over time loses capacity, discharges faster and can even pose a danger when critical wear. If your phone turns off at 20-30% charge, overheats during charging or runs out in a few hours in standby mode, these are the sure signs of battery problems. In this article, we will discuss all the available ways to check the battery status on Xiaomi, Redmi and POCO devices, including hidden engineering menus, third-party applications and data analysis via ADB.
It’s important to understand that even new smartphones can have a factory battery defect, and after 2-3 years of active use, its capacity decreases by 20-40% – this is a normal process of degradation. However, some models (for example, the Xiaomi Mi 11 with dual batteries or the Redmi Note 10 Pro with fast charging) require special attention because of the specific design. We will not only show how to get accurate data on the health of the battery, but also explain which indicators are considered critical for replacement and which are just a signal to change in charging habits.
1. Check through the hidden menu ##4636##
The fastest way to get basic battery information is to use the Android engineering menu, which works on most Xiaomi smartphones without root rights and additional apps, but is not available on all firmware (for example, it can be blocked in Chinese versions of MIUI).
To open the menu:
- Open the Phone app.
- Enter the combination: ##4636## (no spaces).
- In the window that appears, select Battery Information.
In this section you will see the following key parameters:
- 🔋 Level of charge (level) – current percentage in digital form.
- ⚡ Voltage – the norm for Xiaomi lithium polymer batteries is 3.7-4.4 V.
- 🌡️ Temperature: Optimal range of 20-40°C; values above 45°C critical.
- 📊 Status – can be displayed as Charging, Discharging or Not charging.
⚠️ Note: If the battery voltage is below 3.5 V at 100% charge or above 4.5 V, this is a sign of severe wear or failure of the controller, in which case it is recommended to stop using the device before replacing the battery.
2.Use code ##6484## for battery test
Lesser known, but more informative code is ##6484##. It opens the hardware component testing menu where you can run an automatic battery test, which works on most Xiaomi and Redmi models released after 2018 (e.g. Redmi Note 8 Pro, Xiaomi Mi 9T).
Instructions:
- Open the Phone app and type ##6484##.
- In the MBAT Test (or Battery Test) menu, click Start.
- Wait for the test to be completed (usually 10-30 seconds).
According to the test results, you will receive:
- 📋 Battery capacity in mAh (compare with passport capacity of your model).
- ⚡ Charging/discharge current – useful for diagnosing charger problems.
- 🔄 Charging cycles – the number of full discharges / charges (the more, the stronger the wear and tear).
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If ##6484## is not working, try the alternative: ##64663## (MBAT Menu) or ##36446337## (Engineering Mode).
For example, if your Xiaomi Poco X3 Pro has a passport capacity of 5160 mAh and the test shows 4200 mAh, this means wear by ~19%, which is still an acceptable figure. But if the capacity has fallen below 3500 mAh (~32% wear), the battery should be replaced.
3. Applications for detailed diagnostics
Hidden menus provide limited information, so it’s better to use specialized apps for deep diagnostics. We tested 5 popular utilities and selected two of the most accurate and safe for Xiaomi.
AccuBattery (recommended for beginners)
AccuBattery analyzes charging cycles, measures the actual battery capacity and predicts its wear and tear, and it works without root rights but requires calibration (at least 3 full charge/discharge cycles).
Which shows:
- 📉 A percentage of battery health score (e.g., 88% means 12% wear and tear).
- 🔌 Charging speed in time and current (useful to check the originality of the charger).
- 📊 Usage statistics – which applications use up the most charge.
AIDA64 (for advanced users)
AIDA64 is a powerful iron analysis tool that shows the actual battery capacity in mAh, fabrication technology (Li-Polymer/Li-Ion), voltage and temperature in real time, suitable for comparison with passport data.
How to use:
- Install AIDA64 from Google Play.
- Go to the Battery section.
- Compare the capacity indicator with the official data of your model (see the table below).
| Xiaomi model | Passport capacity (mAh) | Critical wear (mAh) |
|---|---|---|
| Redmi Note 11 Pro+ | 4500 | <3500 |
| Xiaomi 12 Pro | 4600 | <3600 |
| POCO F4 GT | 4700 | <3700 |
| Xiaomi Mi 11 Ultra | 5000 | <4000 |
⚠️ Note: If the application shows the capacity for 30-40% below the passport, but the phone is stable -- there's a possible calibration error. MIUI (Settings → Battery → Three points. → Drop it).
☑️ Preparation for battery testing
4. Verification through ADB (for technical users)
If you want the most accurate data without third-party apps, you can use ADB (Android Debug Bridge), which requires connecting the phone to a PC and basic command line knowledge, but gives access to hidden battery settings that standard utilities don't show.
Instructions:
- Enable USB Debugging on your phone (Settings → About Phone → MIUI Version (click 7 times) → Additional → Developers → USB Debugging).
- Connect your phone to your PC and open the terminal (cmd or PowerShell).
- Enter the command: adb shell dumpsy battery
In conclusion, pay attention to the following lines:
- 🔢 level - current charge in percentage.
- ⚡ Voltage - Voltage in millivolts (divided by 1000 for volts).
- 🌡️ Temperature: Temperature in tenths of a degree (e.g, 285 = 28.5°C).
- 📊 charge_counter — approximate capacity in microamper-hours (divided by 1000 for mAh).
Example of output for Xiaomi Redmi Note 10:
level: 85
voltage: 4123 (4.123 V)
temperature: 302 (30.2°C)
charge_counter: 3800000 (3800 mAh)If charge_counter significantly lower than the passport capacity (for example, 3000 m.h. 5000 This is a very strong wear and tear, and also note the voltage: higher. 4.4 In the 100% The charge may indicate a faulty charging controller.
What if the ADB does not recognize the device?
5. Analysis of battery logs in MIUI (hidden function)
MIUI maintains detailed battery consumption logs that can be exported and analyzed, a method that is useful if you suspect that a particular application or system process is consuming the charge.
How to get the log:
- Go to Settings. → Battery → Cog badge (⚙) → Battery Log.
- Click Export - the file is saved in.txt format.
- Open the file on the PC and find the lines with discharge_rate (discharge rate) and capacity.
Example of a log fragment:
[2026-05-20 12:34:56] capacity=78, discharge_rate=210, temp=32
[2026-05-20 12:35:56] capacity=77, discharge_rate=250, temp=33Here:
- discharge_rate=250 This means that the battery is discharged at speed. 250 mA/hour (standby norm — <100 m/h).
- If the speed exceeds 500 mA/h without active use, look for a voracious application or background process.
⚠️ Note: Health may be listed in logs with Good, Overheat, Dead or Unknown values, the latter three being a reason to visit a service center, especially if they are accompanied by sudden shutdowns or bloating of the body.
Physical inspection of the battery (visual signs of wear)
Even if software tests show normal values, a physical examination of the battery can reveal critical problems, especially for phones older than 3 years or after falls/blows.
Signs of malfunction:
- 🔺 Bloating - if the back cover or screen starts to "go away" it's dangerous! battery can burst or ignite.
- 🔥 Overheating – if the phone is heated above 50°C without load (check through) AIDA64).
- ⚡ Uneven charging – for example, the charge jumps from 80% to 100% or the phone turns off at 30%.
- 🔋 Visible deformation – if the battery has bulges or cracks when inspected (for example, after disassembly.
How to inspect the battery:
- Turn off the phone and remove the back cover (on removable battery models, such as the Redmi 4A).
- Light a flashlight on the battery - swelling is usually noticeable by "bubbles" or curvature.
- Check the contacts for oxidation (green plaque) or corrosion.
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If the battery is swelling, you can't pierce it, heat it or keep using it! Remove the battery immediately (in gloves) and dispose of it at a special reception point.
7.When to change the battery: criteria for Xiaomi
Xiaomi doesn’t set strict standards for battery replacement, but there are generally accepted thresholds after which the risk of sudden disconnection or damage to the phone increases:
| Parameter | Norma. | Warning | Critical wear and tear |
|---|---|---|---|
| Capacity (from passport) | 90–100% | 70–89% | <70% |
| Voltage (at 100% charge) | 4.3–4.4 B | 4.2–4.3 B or 4.4–4.5 B | <4.2 B or >4.5 B |
| Temperature in plain | 20–35°C | 35–45°C | >45°C |
| Discharge rate (in anticipation) | <1%/hour | 1-3%/hour | >3%/hour |
Additional signs that the battery should be replaced:
- 🔌 The phone does not hold a charge longer than 2-3 hours with moderate use.
- 🔄 Charging takes 2 times longer than before (for example, instead of 1.5 hours - 3 hours).+ hour).
- ⚡ The phone turns off at 20-40% charge, although it used to work up to 0%.
- 📱 The body is deformed (even if the swelling is not visible from the outside).
For models with dual batteries (for example, Xiaomi Mi 11 Ultra or Black Shark 4 Pro) the criteria are stricter: if at least one of the batteries has a capacity below 70%, it is recommended to replace both (they work synchronously, and the "weak link" accelerates the wear of the second).