How to see the battery capacity on Xiaomi: all the ways from MIUI to ADB

Have you bought a used Xiaomi and doubted whether the seller honestly listed the battery capacity? Or did your smartphone run out too quickly and want to check if the battery has gone down? In this article, we will examine all the working ways to find out the real battery capacity on Xiaomi, Redmi and POCO devices – from standard MIUI tools to hidden engineering menus and ADB commands.

It is important to understand the difference between the nominal capacity (as specified in the characteristics) and the current capacity (actual after wear). For example, the new Xiaomi 13 Pro has a battery of 4820 mAh, but after a year of active use, its real volume can be reduced to 4200-4500 mAh. We will show how to measure both parameters and assess the degree of degradation.

Spoiler: The most accurate method is to use ADB or apps like AccuBattery, but even the standard MIUI menu will give you a rough idea. If you're not ready for technical manipulation, start with the first three ways -- they don't require root rights or a computer.

1. Capacity check through MIUI settings (without programs)

The easiest way is to use the built-in MIUI diagnostics, which is suitable for most Xiaomi models based on MIUI 12-14, but shows not the exact capacity, but the percentage of battery wear.

1. Open the Settings app (cog icon).
2. Go to the About Phone section (usually at the bottom).
3. Tap on All Features (or General Information on Older Versions).
4. Find the battery status line – here will be the percentage of the rated capacity (for example, 92% means that the battery is worn out by 8%).

⚠️ Note: This method does not work on all devices, POCO F5 or Redmi Note 12) Battery status may not be available, in which case proceed to the following methods.

If you have MIUI 14 or newer, try an alternative route:

Settings → Battery and performance → Battery condition

2.Using the secret code ##4636##

Android’s hidden engineering menu provides advanced battery information, including charge levels in millivolts (mV) and temperature, and while it doesn’t show direct capacity in mAh, it can help gauge battery health.

Instructions:

1. Open the Phone app.
2. Enter the combination: ##4636### (some models may require ##6484###).
3. In the menu that opens, select Battery Information.
4. Pay attention to the fields: 🔋 Level - current percentage of charge. ⚡ Voltage - voltage in millivolts (normal: 3700-4200 mV at 100% charge). 🌡️ Temperature – Temperature (optimum: 25–40)°C).

🔍 How do you decrypt the data? If the voltage at 100% charge is below 4,000 mV, it could indicate battery wear. Temperatures above 45.°C in normal use - reason to check the battery for defects.

💡

If the ##4636### code doesn’t work, try entering it in the Calculator app – it works on some firmware.

3. Diagnostic applications: AccuBattery, CPU-Z, AIDA64

The utility side provides more detailed information than standard MIUI tools. Let's consider the three most reliable applications:

• 📊 AccuBattery - shows real capacity (in mAh), discharge rate and wear. For accurate measurements, you need to fully charge and discharge the phone 1-2 times.
• 🔧 CPU-Z — Battery displays voltage, temperature and health (state of mind).
• 📱 AIDA64 — Provides the most detailed information, including battery technology (Li-ion/Li-Po) Design capacity (nominal from the manufacturer).

📌 Step-by-step instructions for AccuBattery:

1. Install the app from Google Play.
2. Charge your phone to 100% and turn off charging.
3. Use your smartphone as normal until the charge drops to 15-20%.
4. Open AccuBattery → Health tab, where you will see the actual capacity value (e.g., 4,500 mAh out of 5,000 mAh).

⚠️ Note: Apps like AccuBattery may show inaccurate data on new smartphones (first 3-5 charge/discharge cycles.

4. Check through ADB (for advanced users)

If you want the most accurate data, use ADB (Android Debug Bridge), which requires a computer and developer mode on, but gives you access to hidden battery settings.

🛠️ What's the matter:

• 💻 Computer with installed ADB-driver.
• 📱 Xiaomi smartphone with enabled debugging USB.
• 🔌 USB-cable (preferably original).

📝 Instructions:

1. Turn on Developer Mode: Settings → About Phone → MIUI Version (shap 7 times)
2. Activate USB Debugging: Settings → Additional → For Developers → Debugging by USB
3. Connect your phone to your computer and open the Command Prompt (Windows) or Terminal (macOS/Linux).
4. Enter the commands in turn: adb devices (should appear your device) adb shell dumpsys battery
5. Find the line in the output: capacity - current percentage of charge. voltage - voltage. charge counter - real capacity in microcoulombs (mkA·h), divided by 1000 = mA·h.

💡 Example of inference:

...




charge counter: 4500000 (which corresponds to 4500 mAh)




...

⚠️ Note: On some Xiaomi models (e.g, POCO X3 Pro) the dumpsys battery command may not display charge counter:

adb shell cat /sys/class/power_supply/battery/capacity

Developer mode is on

Installed ADB-PC-driver

USB-cable connected to port USB 2.0 (not 3.0!)

USB debugging is allowed on the phone

Smartphone unlocked (no screen locking)-->

Comparison with passport data: container table

To see how worn your battery is, compare the actual capacity to the nominal capacity (specified by the manufacturer). Below is the table of capacities for popular models Xiaomi, Redmi and POCO:

📉 How do you measure wear? If the actual capacity is less than the nominal capacity:

• 🟢 0-10% - battery in excellent condition.
• 🟡 10-30% - moderate wear, can be operated.
• 🔴 30% or more - critical wear, recommended replacement.

⚠️ Note: Some budget models (e.g. Redmi) A1) The manufacturer may specify a typical capacity (for example, 5000 mAh), while the real one is 4800-4,900 mAh.

Physical battery inspection (for disassembled devices)

If you're ready to disassemble a smartphone (for example, to replace a battery), you can read the capacity directly from the battery, and most Xiaomi batteries have the basic parameters labeled on their body.

🔍 Where to find?

• 📏 The front of the battery is usually marked: Capacity: 4500mAh (rated capacity. Voltage: 3.85V (rated voltage. Min Capacity: 4300mAh (minimum capacity).
• 🔢 Serial number and production date (e.g, 2022-05).

⚠️ Warning: Disassembling your smartphone will void warranty and may damage the plumes or display. If you are unsure of your skills, contact a service center. On models with battery adhesive attachment (such as Xiaomi 13), you will need a hairdryer or a special mediator to safely extract it.

💡

If the actual battery capacity is less than 80% of the nominal, it is recommended to replace it - further degradation will accelerate, and the operating time will be reduced by 30-50%.

FAQ: Frequent questions about Xiaomi battery capacity