How to test the battery on Xiaomi: from diagnosis to extension of service life

Battery is one of the most vulnerable spots in Xiaomi smartphones, especially after 1-2 years of active use: Capacity drop, sudden shutdowns at 20-30% charge, overheating during charging are all signals that the battery requires diagnosis. But how to check its condition without disassembling the device and specialized equipment?

In this article, we will discuss 5 working ways to test the battery on Xiaomi, Redmi and POCO — From hidden engineering menus to third-party apps with detailed analytics, you’ll learn how to interpret mAh, charging cycles and temperature, and what to do if the battery is worn out by 50% or more. 13T Or the Redmi Note 12 Pro.+), where the replacement costs 30-50% of the cost of the smartphone.

1. Check through the engineering menu (#4636##)

The fastest way to get basic battery information is to use a hidden engineering menu, which is available on all Xiaomi smartphones running MIUI (including HyperOS) and does not require root rights. Importantly, on some models (such as the POCO F5), this menu can be blocked by the manufacturer.

Instructions:

• 📱 Open the Phone app and enter the combination: ##4636##.
• 🔍 In the menu that appears, select Battery Information).
• 📊 Note the following parameters: Level - current percentage in digital form (may differ from the one displayed in the status bar); Status - must be Charging (charging) or Discharging (discharging); Health - if Good is indicated, the battery is normal; Unknown or Dead - critical wear. Temperature - optimal 25-40°C. Exceeding 45°C dangerously!

Level of charge (Level)| Status | Health | Temperature | Voltage

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⚠️ Note: Some firmware (e.g. global) MIUI 14) the Health item may not be available, in which case use alternative methods from the following sections.

2. USSD codes for battery diagnostics

In addition to the universal code ##4636##, Xiaomi also has other service combinations that provide advanced information, which are not officially documented, but are verified on Redmi Note 11, Xiaomi 12 and later.

List of working codes:

• 🔋 ##6484## - Battery test (shows mWh, voltage and temperature in real time).
• 📱 ##64663## - Hardware testing menu (select "Battery»).
• 🔄 ##44336## - Log of charging cycles (shows how many times the battery has been charged to 100%).

Once you enter the code, you will be taken to the technical menu, for example, in the test ##6484##, pay attention to:

• MB_06 — actual capacity in mAh (compare with the passport capacity of your model).
• MB_02 — tension (3.7–4.4V normally).
• MB_10 — Temperature (critically if higher) 50°C).

Once a month |Only when problems start |Never checked |Use monitoring apps

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⚠️ Warning: Do not enter random codes from the Internet - some (for example, ##7780###) can reset to factory settings.

3. Applications for deep diagnostics

If the engineering menu doesn't give you the full picture, use specialized applications that analyze charging cycles, discharge rates, and even predict the remaining battery life.

Guidelines for using AccuBattery (the most accurate app for Xiaomi):

1. Set and resolve all requests (access to battery statistics).
2. Charge your phone to 100% and wait for the “charge is complete” notification.
3. In the Health section, look at Estimated capacity, compare it to passport capacity (for example, the Redmi Note 12 Pro is 5,000 mAh).
4. If the difference is more than 20%, the battery is worn out.

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In AccuBattery, disable the option “Optimize Charging” in the app settings – it can distort test data on some Xiaomi models.

4. ADB test (for advanced users)

If you want the most accurate data (for example, for warranty cases), use ADB (Android Debug Bridge), which requires connecting your smartphone to a PC, but gives you access to hidden battery settings that do not show the applications.

Instructions:

1. Download and install Platform Tools (includes adb).
2. On your smartphone, turn on “Debugging by” USB» In Settings → The phone. → Version. MIUI (Press 7 times on the version MIUI, Then go back to the settings. → Additionally. → For developers).
3. Connect your phone to your PC and type in the command line: adb shell dumpsys battery
4. Look for the following parameters in the output: level - current charge in %. voltage - voltage in mV (for example, 4200 = 4.2V). temperature - temperature in °C (divided by 10, for example, 345 = 34.5 °C). - current capacity (if any).

For full information about charging cycles, use the command:

adb shell dumpsys batterystats

⚠️ Note: Some Xiaomi models (e.g, POCO X5 Pro) block access to capacity through ADB. In this case, use AccuBattery or 3C Battery Monitor with root rights.

5. Visual diagnosis and physical signs of wear

Even without tools, you can detect battery problems by indirect signs.

• 🔥 Overheating during charging or playing (especially if the body gets hot in the area of the camera – there is usually a battery located).
• ⚡ Sudden shutdowns at 15-30% of charge (indicates a drop in real capacity).
• 🕒 Quick discharge in standby mode (for example, lost overnight) >10% when Wi-Fi is off).
• 🔌 Slow charging (if the power supply is working, but charging takes longer than usual).
• 📉 Bloating of the body (seen by the "opened" back cover or screen glass extending from the frame).

💡 Tip: If the smartphone turns off at 1-5% charge, it may not be a battery problem, but an incorrect calibration of the controller. Try to discharge the phone before it turns off, then charge to 100% without interruption. Repeat 2-3 times.

6.When to change the battery: criteria for Xiaomi

The manufacturer claims that Xiaomi batteries are designed for 500-800 charge cycles (full discharge + charge up to 100%).However, in practice, after 300-400 cycles, the capacity drops to 70-80%, which leads to a noticeable reduction in operating time.

🔧 Cost of battery replacement in Xiaomi service centers (2026):

• Redmi Note 10/11/12, POCO X3/X4 — 1500–2500 ₽.
• Xiaomi 11T/12T/13 — 3000–4500 ₽.
• Xiaomi 13 Pro/14 Ultra — 5000–7000 ₽ (due to the complexity of disassembly).

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If the battery capacity fell below 70% of the passport, and the smartphone is older than 2 years - replacement will cost less than repairing the consequences (blowning, damage to the board).

FAQ: Frequent questions about Xiaomi batteries