Have you noticed that Xiaomi's smartphone is running out faster than before? Or want to make sure the seller hasn't cheated on the battery specs? Checking the actual battery size is a key step to diagnosing the device. But manufacturers often hide this information behind complex menus or require special tools.
In this article you will find 5 Proven ways to find out the battery capacity on any Xiaomi, Redmi or POCO β from standard settings to engineering codes and ADB-We'll look at why the numbers may differ from the ones reported, how to detect a fake, and what to do if the battery is worn out. MIUI 14/15 Android 13/14.
Xiaomi Standard Settings: Where to Look for Battery Information
Letβs start with the simplest, built-in MIUI tools. Unfortunately, Xiaomi doesnβt display the exact battery capacity in milliamp hours (mAh) in the basic settings, but you can find indirect data:
Open Settings β Battery and Performance β Battery status. Here you will see:
- π Percentage charge level (current and maximum)
- β‘ Battery temperature (normal: 25β40)Β°C when charging)
- π Timetable of use for the last 24 hours
Note the "Maximum Capacity" item -- if you have one in your firmware. For example, on the Xiaomi 13 Pro, you can see a value like 4820 mAh / 5000 mAh, where the first digit is the current capacity, the second is the factory one. A difference of more than 20% signals critical battery wear.
β οΈ Note: Some models (e.g. Redmi) 9A) The battery state section may not be there. It's not a defect, it's just a firmware restriction.
2. Engineering menu ##4636###: Hidden battery data
Secret code ##4636## reveals the Android engineering menu, where technical data, including battery information, are hidden.
- Open the Phone app.
- Enter the ##4636## combination (some models may require you to press the call button).
- Select the Battery Information tab.
Here you'll see:
- π Level of charge (level) - current percentage.
- π Power source: battery (from battery) or usb (from charging).
- π Health: Good (good), Unknown (unknown), or Dead (failed).
- π Temperature: in tenths of a degree Celsius (for example, 325 = 32.5Β°C).
- β‘ Voltage - Normal: 3.7β4.2V.
Unfortunately, the exact capacity in mAh doesn't show up here, but the Health parameter is a proxy for wear: if the Unknown status is, the battery is either severely worn out or unoriginal.
π‘
If the engineering menu does not open, try entering the code through the Calculator application: dial ==4636== and press "=".
3. Diagnostic applications: AccuBattery, CPU-Z and others
Third-party utilities often show more data than standard MIUI tools. We tested 5 popular apps and selected the best ones for Xiaomi:
| Annex | Shows capacity (mAh) | Additional functions | Cons |
|---|---|---|---|
| AccuBattery | β Yeah (calculated) | Wear monitoring, charging history, temperature | Requires calibration (2-3 charging cycles) |
| CPU-Z | β Yes, in Battery section) | Full Iron Characteristics, Performance Tests | Capacity can be displayed with an error of Β± 10% |
| AIDA64 | β Yeah) | Detailed information about the battery, including technology (Li-ion/LiPo) | Paid version for full functionality |
| 3C Battery Monitor | β Yes (with calibration) | Discharge schedules, overheating notifications | A complex interface for beginners |
Recommendation: Use AccuBattery for accurate measurement.
- Charge your smartphone to 100% (use the original adapter!).
- Open the app and go to the Health section.
- Wait for the application to collect data (usually 1-2 charge/discharge cycles).
Example of the report from AccuBattery for POCO X3 Pro:
Factory capacity: 5160 mAh
Current capacity: 4520 mAh (88% of the original)
Wear: 12% (norm to 20%)β οΈ Warning: If the app shows capacity 30-40% below factory capacity (e.g., 3000 mAh instead of 5000 mAh), this is a sign of either deep wear or a fake battery. On new smartphones, this is unlikely - check the Optimized Charging setting in Settings β Battery.
4. ADB-Teams: Accurate data for advanced users
For those who are not afraid of the command line. ADB (Android Debug Bridge allows you to get access to the_raw_-Battery data directly from the power controller:
Install Xiaomi drivers on PC (download from [en.miui.com](https://en.miui.com)
Enable "Debugging by USB" in Settings β About Phone β MIUI version (click 7 times)
Download [ADB Tools](https://developer.android.com/studio/releases/platform-tools)
Connect your smartphone to your PC via USB (select "File Transfer" mode)
-->
After preparation:
- Open the command prompt (Windows) or terminal (macOS/Linux) in the folder with adb.exe.
- Enter the command to check the connection: Adb devices should appear the name of your device.
- Execute the command to obtain battery data: adb shell dumpsys battery
In the answer, find the lines:
level: 85 # Current charge, %
Voltage: 3987 Voltage in mV
temperature: 302 # 0.1Β°C (30.2Β°C)
charge_counter: 3210000 # Current capacity in ΞΌAh (divided by 1000 for mAh)Example of calculation: if charge_counter: 4250000, current-capacity = 4250 Compare this value to the factory value (for example, 5000 mAh for Redmi Note 11) β This will show you the real wear.
What if the ADB does not recognize the device?
5. Physical check: how to find out the capacity by battery labeling
If you have access to a battery (for example, when you replace it), check the battery case. The original Xiaomi batteries are marked with key parameters:
- π The battery model, for example, BM4B (For the Redmi Note 10 Pro).
- π Capacity - look for the inscription of the type 4500mAh or 4.5Ah (1Ah = 1000mAh).
- β‘ Tension - usually 3.85V or 4.4V (fast-charging).
- π Date of production - format YY/MM/DD (for example, 22/05/15 = 15 may 2022).
Examples of marking on popular models:
| Smartphone model | Factory capacity | Battery markings |
|---|---|---|
| Xiaomi 12T Pro | 5000 mAh | BD50 or BM50 |
| Redmi Note 11 Pro+ | 4500 mAh | BM4B (with 120W support) |
| POCO F4 GT | 4700 mAh | BM47 (double battery) |
β οΈ Warning: If the battery capacity does not match the declared capacity (for example, on the label) 3500mAh instead 5000mAh), You're either a fake or a battery from another model:
- Check the serial number on the Mi Verify website.
- Compare the weight of the battery β the original 5000mAh weighs ~100-120g.
- Pay attention to the quality of the print β on fakes, the text is often blurred.
Xiaomi Online Services: Checking by IMEI and Serial Number
Xiaomi's official tools allow you to verify the originality of components, including the battery.
- Through Mi Verify: Go to the checkout page. Enter IMEI (see: *#06#) or the battery serial number. The system will show the status: Original (original) or Unverified (unconfirmed).
Through the Mi Authenticity app:
- Download the app from the Mi App Store.
- Scan it. QR-code on the box or enter IMEI manually.
- The report will include Battery Status.
Limitations of the method:
- π It only works for batteries purchased from Xiaomi partners.
- π¦ Does not show the current capacity - only originality.
- β³ Data may be updated with a delay (up to 30 days).
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If the battery doesn't pass the originality check but the smartphone is working fine, it may have been replaced at a service center.