How to see how much milliamper in the battery of the Xiaomi phone: 5 proven ways

Ever wondered why your Xiaomi, Redmi, or POCO is running out faster than the manufacturer promises? The reason may lie in the actual battery capacity — it often differs from what is claimed due to wear, factory defects, or improper calibration. In this article, we’ll look at how to know exactly how many milliampre hours (mAh) are left in your smartphone’s battery, and why it’s important to extend its life.

Manufacturers specify the nominal capacity (for example, 5000 mAh for Redmi Note 12 Pro+), But over time, that number goes down, if the phone holds the charge. 6-8 hours instead of promised 12, Now, it's time to check the current capacity. We've collected all the working methods, from the standard tools. MIUI It's all about hidden engineering menus and third-party utilities, no complicated manipulations, only proven methods that will work even on locked devices.

Important: Milliamper capacity data will not only help you measure battery wear, but also help you identify counterfeits, for example, if a vendor claims that a Xiaomi 13T battery has a capacity of 5,000 mAh and the diagnostics show 4200 mAh, that's a reason to return the product, and then you have detailed instructions for each model and version of MIUI.

1. Standard method: via the Battery Status menu in MIUI

The easiest method is to use the built-in MIUI tools, which are suitable for most Xiaomi, Redmi and POCO smartphones based on Android 10 and later. However, not all models display accurate capacity in milliamperes - some show only the percentage of wear.

To check:

  1. Open the Settings. → The phone.
  2. Tap the MIUI version several times until the notification “You became a developer” appears.
  3. Return to the main Settings menu and select Additional → Battery Status.
  4. The Battery Capacity or Health section will specify the current value in mAh (e.g., 4500 mAh / 5000 mAh).

⚠️ Note: On certain devices (e.g, POCO X5 Pro) only the percentage of wear can be displayed instead of the exact milliamperes.

💡

If you don't have capacity data in the Battery Status menu, try updating MIUI to the latest version. In firmware older than MIUI 12, this feature is often missing.

2. Engineering menu: hidden codes for battery diagnostics

The Engineering Mode is a hidden tool that provides detailed information about the hardware of a smartphone, including the actual battery capacity.The method works on all Xiaomi devices, but requires caution: do not change other parameters so as not to disrupt the system.

Instructions:

  1. Open the phone app and enter the combination: ##4636##
  2. In the menu that appears, select Battery Information.
  3. Find the lines: Level - current charge in percentage; Capacity - real capacity in mAh; Design Capacity - factory capacity.

🔹 Example: If the Design Capacity says 5,000 mAh and Capacity says 4,300 mAh, the battery is 14 mAh worn out%.

What to do if the engineering menu is not opened?
On some models (e.g. Xiaomi 12T), the standard code may not work. Try alternative combinations: ##284### - battery test; ##36446337## - advanced information about MI. If they don't work, go to the method with ADB or third-party applications.

⚠️ Warning: Do not change the parameters in the engineering menu unless you are sure of their purpose. Incorrect settings can lead to overheating or rapid discharge of the battery.

3. Diagnostic applications: AccuBattery, CPU-Z and others

If the built-in MIUI tools don't show capacity in milliamperes, third-party utilities will come to the rescue, they analyze data from the battery controller and calculate the real capacity based on charging/discharge cycles, and we tested 5 popular applications and selected the most accurate ones.

AnnexprecisionPlusesCons
AccuBattery⭐⭐⭐⭐⭐Shows wear in % and mAh; Monitors temperature; Tips for extending service life.It requires 2-3 charging cycles for accurate data.
CPU-Z⭐⭐⭐⭐Design Capacity and Full Charge Capacity.No wear schedules.
Battery Guru⭐⭐⭐Simple interface, showing voltage.Advertising is less accurate than AccuBattery.

📌 How to use AccuBattery:

  1. Install the application and provide access to the battery data.
  2. Charge your phone to 100% and wait for the “charge is complete” notification.
  3. The Health section will show the current value in mAh.

AccuBattery|CPU-Z|Battery Guru|Other|Not using.-->

4. Method through ADB: for advanced users

If you want the most accurate data, and the standard methods don't work, use Android Debug Bridge (ADB), a technique that requires connecting your phone to a PC, but gives you access to hidden battery settings, including real capacity in milliamperes.

Step-by-step:

  1. Download and install ADB Tools on your computer.
  2. Turn on USB Debugging on your phone: Settings → About Phone → MIUI Version (tap 7 times); Settings → Additional → For Developers → Debugging over USB.
adb shell


dumpsys battery

Find the lines:

    ⚠️ Note: If the container on the sticker is significantly lower than the declared (for example, 3500mAh instead 5000mAh), These batteries are dangerous, they can swell or ignite.

    💡

    If the device is warranty-free, contact Xiaomi Service Center for a free battery diagnosis.

    Frequent Mistakes and How to Avoid Them

    When checking battery capacity, users often encounter inaccurate data or errors, and we've collected the most common problems and ways to solve them:

    • ⚡ No data in AccuBattery: The app requires at least one full charging cycle to collect data.charge the phone 15% to 100% without turning off.
    • 📉 Capacity falls too fast: If the capacity has decreased by a month 200-300 mAh, check the phone for viruses or background processes that consume charge. → Battery → Use of the.

    💡 Tip: If the actual capacity is below 80% of the factory (for example, 4000mAh instead 5000mAh), Official service centers Xiaomi offer this service for 1500-3000 rubles depending on the model.

    Can the battery capacity be restored if it drops to 3,000 mAh?
    No, the physical wear and tear of lithium-ion batteries is irreversible. However, you can slow down further degradation: Avoid full discharge (keep the charge in the range of 20-80%); Do not use cheap chargers; Avoid overheating (do not play heavy games while charging). If the capacity has fallen below 60% of the factory, the only solution is to replace the battery.
    Why does the engineering menu have a capacity of 5,000 mAh, and AccuBattery has a capacity of 4,500 mAh?
    This is a normal discrepancy. The engineering menu can show the nominal capacity (factory), and AccuBattery can show the real capacity, given the wear and tear. For accuracy, focus on these applications after 2-3 charging cycles.
    How often should I check the battery capacity?
    Recommended frequency: Every 3 months for new phones; every 1-2 months for devices older than 1.5 years; Immediately - if you notice a sharp reduction in the time of operation.
    Can I use my phone if the battery capacity has dropped to 2000 mAh?
    Technically, but it's not safe. With this degree of wear: The risk of battery bloating increases by 3-5 times; the phone can suddenly turn off even at 30-40% charge; Charging can take 2-3 times longer. The critical capacity for most Xiaomi models is 3000 mAh. Below this value, the battery needs to be replaced.
    Where to buy the original battery for Xiaomi?
    Official sources: Xiaomi Service Centers (6 months warranty); Mi Store Brand; Authorized Resellers (check for Xiaomi hologram on packaging). ⚠️ Avoid shopping on marketplaces (such as AliExpress) – the risk of running into a fake is ~70%.