How to check the status of the battery on Xiaomi: step-by-step instructions and secrets MIUI

A battery is the heart of any smartphone, and Xiaomi is no exception. Over time, even the best batteries lose capacity: the phone starts to run out in a few hours, turns off at 20 to 30 percent charge or overheats during charging. But how do you know exactly how worn out the battery is without disassembling the device? In this article, we will examine all the available methods of verification, from built-in MIUI tools to hidden engineering menus and professional applications.

Many users mistakenly believe that if a smartphone is less charged than before, it is time to change the battery, but the real wear and tear can be much less than it seems — for example, the background software or a faulty power supply is to blame. We will show how to separate myths from facts and get objective data about the battery health on any Xiaomi, Redmi or POCO device.

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The easiest method is to use standard MIUI tools. It is suitable for most modern Xiaomi smartphones (starting with MIUI 12 and later) and does not require additional software installation.

To open the battery status menu:

Go to Settings → Battery and Performance.
Slap the icon. ⚙️ («Battery settings) in upper right corner.
Select Battery Status (on some firmwares it may be called Battery Health).

Here you will see two key parameters:

🔋 Current capacity is the actual battery capacity per mAh (e.g. 3800 mAh instead of the stated 4000 mAh).
⚡ Degree of wear – Percentage of capacity loss (e.g. 12% means that the battery has lost 12% of its original capacity).

⚠️ Note: On some models (e.g, POCO F3 or Redmi Note 10 Pro) this section may not be available, in which case use alternative methods from the following sections.

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If the battery status menu displays a message “Good” but the phone is quickly discharged, check the background processes in the Settings section → Apps → Permissions → Autorun. Often messengers or games that are not optimized for MIUI are to blame.

The engineering menu is the service area of Android, where detailed technical parameters of the device are hidden, and it is available on all Xiaomi smartphones, but it requires caution: wrong actions can lead to failures.

To open the engineering menu:

Open the Phone app.
Enter the combination: ##4636### (some models may require ##6484###).
Select the Battery Information tab.

In this section, pay attention to the following parameters:

📊 Level: Current charge level in percentage (e.g. 85).
🔌 Voltage - battery voltage in millivolts (normal: 3700-4200 mV for Li-Pol batteries).
🔋 Capacity – current capacity (not displayed on all devices).
🌡️ Temperature - temperature in degrees Celsius (optimum: 25-40)°C).

Parameter	Normal value.	Sign of a problem
Voltage (voltage)	3700–4200 mV	Less than 3400 mV at 10-20% charge or more than 4300 mV at 100%
Temperature (temperature)	25–40°C	Above 45°C in plain or below 10°C when charging
Health (condition)	Good	Unknown, Dead or missing value

⚠️ Note: If the Health option is displayed as Unknown or not, this may mean that the battery controller is not transmitting data).

📊 How often do you check the battery status on your Xiaomi?

Once a month

Only when the problems start.

Never checked.

I use third-party apps.

3.Battery Test Codes: Secret Combinations for Xiaomi

Xiaomi hides several utility codes that allow for advanced battery information, which work on most models, but may vary depending on the firmware region.

Try the following codes (enter the phone as a number in the app):

📱 ##6484## - battery test (shows voltage, temperature, charge level).
🔧 ##44336## - hardware diagnostics menu (on some models displays battery status).
🔋 ##284## - Battery test (works on the battery) POCO and some Redmi).

If nothing happens after entering the code, it means:

❌ The code is not supported by your model.
❌ You have custom firmware installed (for example, LineageOS or Pixel Experience).
❌ Manufacturer has disabled access to engineering menus in your region (relevant for European firmware).

💡 Tip: If the codes don't work, try entering them through the Symbols app (if it's preinstalled in your firmware.

What do I do if the codes don't work?

If none of the codes worked, it doesn’t mean the battery is working.Your Xiaomi model may use an alternative diagnostic method, so move on to methods 4 or 5 (applications and ADB).

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

The application side often provides more detailed information than standard MIUI tools, and we tested some popular utilities and selected the most accurate ones.

Top.-3 Applications to check the battery on Xiaomi:

AccuBattery (free, with premium options) 📊 Shows real capacity and wear in percentage. 🔌 Tracks charging cycles and discharge speed. ⚠️ Requires calibration (you need to completely discharge and charge the phone 1-2 times).
CPU-Z (free-for-free) 🔋 Displays voltage, temperature and state (Health). 📱 Shows a battery model (useful for finding a replacement). ❌ Does not show wear in percentage.

Battery Guru

📈 Discharge and heating schedules.
🔄 Monitoring of background processes consuming charge.
⚠️ May show inaccurate data on custom firmware.
Connect your phone to your PC and open the command prompt (cmd) in the ADB folder.
Enter the command to test the battery: adb shell dumpsy battery

📋 Decoding of key parameters in the conclusion ADB:

Parameter	Description	Normal value.
level	Current charge in %	0–100
voltage	Voltage in microvolts (divided by 1000 for mV)	3700000–4200000
temperature	Temperature in tenths of °C (divided by 10)	250–400 (25–40°C)
health	Battery status	2 (good)

💡 Example of inference:

level: 78


Voltage: 3850000 (3850 mV)




temperature: 320 (32°C)




health: 2 (Good)

⚠️ Note: If the health setting is 1 (Unknown), 3 (Dead) or 4 (Overheat), the battery needs to be replaced. Also critical is the difference between the actual voltage and the declared voltage of more than 200 mV (for example, at 50% charge, the voltage must be replaced). ~3800 ml).

Physical Diagnostics: When Software Methods Don't Help

If all of the above methods show that the battery is fine, but the phone is still acting strangely (shutting down 30%, holding no charge, the body is swollen), the problem may be mechanical.

🔍 Signs of mechanical wear of the battery:

📏 Bloating - if the back cover or screen starts to "go away" it's dangerous.
🔥 Overheating without load - the battery heats up to >50°C to the plain.
⚡ Unstable charge – the phone shows 100%, but shuts down after 5 minutes.
🔌 Charging problems – the cable “falls out” or the charge only goes in a certain position.

🛠️ What do you do:

If the battery is swelling, don't use your phone. Lithium-ion batteries in this state can ignite.
If the body is deformed but there is no swelling, check the battery mount (the contact may have gone away).
If the phone turns off by 20-30%, but software tests show wear <10%, the problem may be in the power controller (diagnosis is required in the service center).

⚠️ Warning: Don't try to open your phone yourself if you don't have experience. - Modern Xiaomi (e.g. Xiaomi 13 or Redmi) K60) They have adhesive batteries that are easily damaged if they are not properly removed.

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If the phone turns off at 20 to 30 percent charge, but software tests show wear <15 percent, the problem is probably with calibrating the controller, not the battery itself. Try resetting to factory settings or reflashing the device.

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

Even if your battery is still in good condition, following a few rules can slow wear and extend its life by 20 to 30 percent, based on Xiaomi’s official guidelines and battery manufacturers’ research.

🔋 Top.-5 Charging rules for Xiaomi:

🔌 Avoid full discharge. Optimal range is 20-80%. Full cycle (0-100%) reduces battery life.
⚡ Use the original chargers. Quick charge. 33W/67W/120W Safe, but only with branded power supplies.
🌡️ Do not charge in heat or cold.Optimum temperature — 10–35°C. Charging at -10°C or +45°C damages elements.
📵 Turn off background processes. Close games and instant messengers (such as Telegram or WhatsApp) after use.
🔄 Calibrate the battery every 3 months. Completely drain the phone, then charge to 100% without interruptions.

📊 Xiaomi Battery Myths You Shouldn’t Believe:

❌ «You need to discharge your phone to zero once a month, which was the case for nickel batteries 20 years ago.
❌ «Fast charging ruins battery" - Xiaomi uses controllers that limit current when heated.The main thing is not to use the phone while charging.
❌ «Charging at night kills battery" - modern smartphones automatically turn off power after 100.

💡 Advice for owners POCO Redmi: In models with Snapdragon processor (for example, POCO X3 Pro or Redmi Note 11 Pro+) You can turn on Lean Charging in the battery settings, and it limits the charge to 80 percent, which extends the battery life by 30 to 40 percent%.

FAQ: Frequent questions about Xiaomi batteries

❓ How to find out the original battery capacity of my Xiaomi model?

The official capacity data can be found: On the device box (Specifications section); on the Xiaomi website in the product card; on the CPU-Z app (Battery tab); for example, the Xiaomi 12T Pro has a capacity of 5000 mAh, and the Redmi Note 12 has 5000 mAh (in the Pro version) or 4300 mAh (in the base version).

❓ Why? MIUI It shows 0% wear, but the phone discharges in 3 hours?

It could be related to: 🔌 Faulty power supply (check the charger). 📱 Background processes (open Settings) → Battery → Battery usage and see which apps consume the most). 🌡️ Overheating (check the temperature in the engineering menu). 🔄 Calibration failure (full discharge-charging cycle) If the problem persists, try resetting to factory settings or flashing the device back again.

❓ Can you replace the battery on Xiaomi yourself?

Theoretically, yes, but: ✅ On models with a removable back cover (for example, Redmi). 4X or Mi A1) It's just that. ❌ On new flagships (for example, Xiaomi) 14 or POCO F5) battery glued, and to replace you need a special tool (suction cup, mediator, hair dryer). ⚠️ Risks: damage to plumes, battery rupture (fire hazard!), loss of tightness (on models with protection) IP53/IP68). 💡 Recommendation: If you do not have experience, contact the service.The cost of replacing the battery in official Xiaomi centers - from 1500 before 4000 RUB (depending on the model).

❓ How many charging cycles can Xiaomi battery withstand?

Average life Li-Pol batteries in smartphones Xiaomi: 🔋 300–500 cycles to 20% capacity loss (subject to charging rules). 📉 After 800-1000 cycles, the capacity usually drops to 60-70% of the original capacity. 📊 Example: If you charge your phone every day, you will wear out after 2 years (730 cycles) ~15-25%: In intensive use (2 cycles per day), the battery life is exhausted in 1.5 years.

❓ Why After Replacing Your Battery, Your Phone Shows Wear 10%?

This is OK! The new battery can wear 5 to 15 percent for a number of reasons: 🔧 Calibration – the controller needs 2-3 full cycles to get used to the new battery. 📦 Storage – if the battery was in storage for more than a year, it could lose capacity a little. 📱 Phone service – some firmware (for example, MIUI 13 on Redmi Note 9) misreads data from new batteries. 💡 What to do: Perform 2-3 full charge-discharge cycles. If the wear and tear does not decrease, contact the seller - you may have a used battery installed.