How to check the state of the battery on Xiaomi: step-by-step methods with the decoding of indicators

Battery is one of the most vulnerable components of a smartphone that gradually degrades even when used carefully. On Xiaomi devices (including Redmi, POCO and Black Shark), battery checks often raise questions about where to watch real wear, how to decipher technical indicators, and what to do if capacity falls too quickly. In this article, we will examine all available diagnostic methods, from standard MIUI tools to engineering menus and third-party applications.

It’s important to understand that even a new battery loses up to 20% of its capacity in 2 years of active use. If your Xiaomi starts to run out in a few hours, overheat or shut down at 30-40% charge, these are direct signs of wear and tear. We will show you how to accurately determine the degree of degradation without disassembling the phone using both built-in features and professional utilities.

1. Checking through MIUI settings: what the system shows

The easiest way is to use the built-in MIUI tools, which give you basic information about the battery, but they don't always show real wear.

1. Open the settings → Battery and performance.
2. Slip on the Battery Status icon (or Battery Use in older versions).
3. The system will show the flow schedule, temperature and approximate operating time.

But there's a catch: MIUI often hides real wear, especially on budget models (Redmi Note 10, POCO M3). For example, if the capacity has dropped to 70%, the system can show a "good" condition.

2 Hidden Engineering Code: How to Find Out the Real Capacity

All Xiaomi smartphones (except some models for Europe) run engineering code that displays accurate battery data, including current capacity, voltage and number of charging cycles.

1. Open the Phone app.
2. Enter the combination: ##4636##
3. Select the item "Battery Information".

In the menu, pay attention to the parameters:

• 🔋 Level - current charge in percentage.
• 📊 Health – battery health (e.g., Good (5) means 95% of original capacity).
• ⚡ Voltage - voltage (normal: 3.7-4.4 V).
• 🔄 Technology - a type of battery (usually Li-ion or Li-poly).

If the Health field has a Unknown value or no number, your Xiaomi model is blocking access to this data (relevant to MIUI Global firmware after 2022), then move on to the next method.

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If the engineering code doesn’t work, try entering it through the Calculator app (enter the sequence of numbers and symbols as a mathematical expression).

3. System Information app: Hidden MIUI data

MIUI has an embedded application that shows technical information about the device, including battery data, to find it:

1. Open the Settings. → The phone.
2. Tap 5-7 times on the MIUI version until the notification “You became a developer” appears.
3. Return to the main settings menu and open Additional → System Information (or System info).
4. Go to the "Battery" tab.

Here you'll see:

• 📉 Design Capacity – factory capacity (e.g. 5000 mAh).
• 📈 Current Capacity – current capacity (if less than factory capacity – battery worn out).
• 🔄 Charge Cycles – Number of complete charging cycles (norm: up to 500).

⚠️ Note: On some models (Xiaomi 12, Redmi) K50) The Current Capacity field can display inflated values.

Third-party applications: AccuBattery and AIDA64

If the built-in MIUI tools don't give you the full picture, use specialized tools. We tested two of the most reliable options:

AccuBattery (Android)

The app analyzes charging cycles and shows real wear as a percentage.

1. Install AccuBattery from Google Play.
2. Charge your phone to 100% and discharge to 0% (important: no recharging!).
3. Open the Health tab - the application will show the current capacity in mAh and the percentage of wear.

AIDA64 (Android)

More technical solution with detailed information:

1. Install AIDA64.
2. Go to the Battery section.
3. Pay attention to the fields: 📊 Health status (Health). 🔋 Current capacity (Current capacity). 🔄 Number of cycles (Charge cycles).

5. Verification through ADB: for advanced users

If you want the most accurate data, use ADB (Android Debug Bridge), which requires connecting your phone to your computer, but gives you access to all the hidden parameters of the battery.

Instructions:

1. Install ADB Tools on your PC.
2. Enable USB debugging on your phone (Settings → About Phone → MIUI Version → Tap 7 times; then Additional → For Developers → USB debugging).
3. Connect Xiaomi to your computer and execute the command in the terminal: adb shell dumpsys battery

For visual verification:

1. Turn off the phone and remove the back cover (on removable battery models, such as the Redmi 4A).
2. Examine the battery for bloating or corrosion of contacts.
3. Check the production date (printed on the battery) – if it is more than 3 years old, a replacement is required.

Bloating or detachment of the screen

The phone turns off at 20-30% charge

Working hours have been cut in half compared to the new condition

Battery heats above 40°C without load

Charging is interrupted or is jerking.-->

7.How to extend the life of the battery: tips from Xiaomi

Even if your battery is in good condition, following simple rules will help delay replacement:

• 🔌 Charging: Avoid full discharge (it is optimal to keep the charge between 20% and 80%).
• 🌡️ Temperature: Do not use your phone in the cold (-10°C) or in the heat (+35°C).
• 🔄 Cycles: one full cycle (0–100%) = two partial (20-80% twice).
• 📵 Storage: If you don’t use your phone for long, charge it up to 50% and turn it off.

For models with fast charging support (Xiaomi 11T, Redmi Note 11 Pro+) it is recommended:

• Turn off the Turbo Charge after 80% charge (in battery settings).
• Use original chargers (low-quality power supplies accelerate degradation).

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The most harmful scenario for the battery is to keep the phone charging at 100% overnight, which increases wear and tear 30-40% faster than partial recharging.

FAQ: Frequent questions about Xiaomi battery