How to check the battery on Xiaomi: step-by-step instructions for all models

The battery is one of the most vulnerable components of Xiaomi's smartphone, which loses capacity over time and discharges faster. If your Redmi, POCO or Mi has become worse than before, take your time to blame the firmware or background apps. Most likely, the problem lies in the wear of the battery. But how exactly to know its condition without disassembling the phone?

In this article, we’ll look at 5 proven ways to diagnose a battery on Xiaomi devices, from built-in tools to third-party apps, learn how to read real capacity, check charging cycles, and even rate battery health as a percentage, and give tips on how to extend the life of a battery if it’s already getting old.

The fastest way to get basic information about a battery is to use the hidden Android menu, which is available on all Xiaomi smartphones, but the data is displayed in a raw form, without decryption.

Open the phone application and enter the combination:

##4636##

After that, the Testing menu will automatically open. Go to the Battery Information tab.

🔋 Level of charge (level) – current percentage in digital form.
🔌 Power source: Battery (from the battery) or USB/AC (charge-free).
📊 Status: Charging, Discharging, or Not charging).
🔥 Temperature: in tenths of a degree Celsius (for example, 325 = 32.5°C).
⚡ Voltage – should be within 3.7–4.4V normal-work.

⚠️ Attention: If the voltage is lower 3.5V at 20-80% charge or temperature exceeds 45°C in sleeve, battery critically worn and needs replacement.

💡

If the menu doesn’t open, try typing the combination in the Google Dial (install it from Play Market) app, rather than in the standard MIUI call.

2.Use code ##6484## for detailed diagnosis (MIUI 12 and later)

Xiaomi smartphones with MIUI 12 and above have a special battery test that shows more detailed information.

Open the Phone app.
Enter the combination: ##6484###
In the menu that appears, select Battery Test (or MTK Test on some models).

And then you'll see:

Parameter	Meaning	Norma.
Capacity (mAh)	Current real capacity	Must be at least 80% of the claimed (e.g. 3800mAh of 4500mAh)
Charging cycles	Number of full discharges/charges	Up to 500 cycles – the norm, more than 800 – critical
Status.	Good / Normal / Bad	If the battery is bad, it should be replaced.
Charging current (mA)	Current current strength	With fast charging – 1500–3000mA, with slow charging – 500–1000mA

🔹 Important: If the condition is bad or the actual capacity has dropped below 60% of the factory capacity, the battery is in a state of disrepair.

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

Once a month

Only when the problems start.

Never checked.

I don't know how to do that.

3. Battery monitoring applications: AccuBattery, CPU-Z and MIUI Battery Doctor

Hidden menus provide limited information, so it's better to use third-party apps for deep diagnostics, and we tested three of the most reliable ones:

📌 AccuBattery (Play Market)

This app not only shows the current state of the battery, but also tracks the wear and tear in real time.

Charge the phone to 100% and leave it on charge for another 1 hour (for calibration).
Use your smartphone as usual for 2-3 days.
Go to the Health tab to see:

📉 Design capacity (compared to factory capacity).
🔄 Number of charging cycles.
🛠️ Percentage wear score (e.g., “25 percent wear” means that the battery has lost a quarter of its capacity).

What is a "charging cycle"?

One charge cycle is full discharge and battery life is up to 100%. For example, if you run your phone from 100% to 50% and then back to 100%, it's 0.5 cycles. Modern lithium-ion batteries are designed to run for 500 to 1000 cycles, after which their capacity is markedly reduced.

📌 CPU-Z (Play Market)

This app is better known as a hardware checker tool, but it also displays detailed battery information:

🔋 Charge level and condition (Charging/Discharging).
⚡ Voltage and temperature.
📊 Battery technology (e.g. Li-Polymer).

📌 MIUI Battery Doctor (built into firmware)

Some Xiaomi models (e.g. Redmi Note 10 Pro, POCO X3 Pro) have a built-in Battery app with Battery Status section, which displays:

🔄 Number of complete cycles.
📉 Current capacity in mAh.
🛡️ Recommendations for extension of service.

⚠️ Note: Apps like AccuBattery can show inaccurate data in the first days of use. For correct results, you need to calibrate the battery: completely discharge the phone (before turning off), and then charge to 100% without interruption.

☑️ Preparation for battery test

Install AccuBattery or CPU-ZCharge your phone to 100%Do not interrupt the charge for 1 hour after 100%Use your phone as usual for 2-3 daysCheck the results in the Health section

Done: 0 / 5

4.How to test the battery on Xiaomi via ADB (for advanced users)

If you want the most accurate data, you can use ADB (Android Debug Bridge), which requires connecting the phone to a computer, but gives you access to hidden battery settings that don't show the applications.

Here's the step-by-step instruction:

Download and install ADB Tools on your computer.
Turn on Developer Mode: Go to Settings → About Phone. Tap 7 times on MIUI Version. Go back to Settings → Additional → For Developers and turn on USB Debugging.

cmd

adb.exe

adb shell dumpsys battery

In the answer, pay attention to the following parameters:

level: 85 # Current charge in %


Voltage: 4123 #Voltage in mV (4123 = 4.123V)




temperature: 315 # Temperature in tenths of °C (31.5 °C)




charge counter: 3210000 # Current capacity in mkAh (3210 mAh)




health: 2 # Condition: 2 = Good, 3 = Cold, 4 = Dead, 5 = Overvoltage




Technology: Li-polymer #Battery Technology

🔹 Transcription of health:

2 - The battery is in good condition.
3 - low temperature (may temporarily block charging)
4 - The battery is defective (requires replacement).
5 - overvoltage (risk of damage to the controller).

💡

ADB shows the actual charge counter, whereas system settings often round up the values, and if the difference in capacity is more than 30%, it's time to change the battery.

5.Visual battery check: signs of bloating and wear

Even without special tools, you can suspect battery problems by external signs.

🔍 Body bloating: The phone is "blowing" at the back, especially in the camera area. The screen starts to "step away" from the body (noticeably down the slit). Power/volume buttons are drowned or poorly pressed.
⚡ Abnormal charging behavior: The phone shuts down at 20 to 30 percent charge and doesn't turn on without a grid connection. Charging is jerky (fast, then slow). The device heats up strongly in the battery area.
📉 A sharp drop in autonomy: It used to last 2 days, and now it's half a day with the same use. The phone discharges by 10-15% in an hour in standby mode.

⚠️ Note: If the battery is swelling, it is not allowed:

Continuing to use the phone is a risk of short circuit.
Try to puncture the battery (produces toxic gases).
Charge the device (increases the pressure inside the housing).

In this case, immediately turn off the phone and contact the service center.

🔧 What to do if the battery is swelling?

Turn off the phone and remove it. SIM-map.
Place the device in a non-combustible container (such as a metal box).
Do not store near heat sources.
Contact the service for battery replacement (cost - from 1000 to 3000 rubles depending on the model).

6 How to extend the life of the battery on Xiaomi: 7 practical tips

Even if your battery is still in good condition, following simple rules can slow it down by 20 to 30 percent.

🔌 Avoid full discharge and 100% charging: Optimal range is 20-80%. Use AccuBattery to set up notifications when these values are reached.
❄️ Don’t overheat or overcool your phone: The ideal temperature for lithium-ion batteries is 10-35°Do not leave your phone in the sun or near a heater.
🔄 Use Original Chargers: Cheap cables and power supplies can damage the charging controller, which will speed up battery wear.
📵 Turn off background processes: Go to Settings → Battery → Power Saving Mode and Enable Background Limitation for Unnecessary Applications.
🌙 Set up a dark theme and adaptive brightness: AMOLED-screens (for example, on Xiaomi 12 or Redmi) K50) They consume less energy on a dark topic.
🔄 Calibrate the battery once every 3 months: Completely discharge the phone before turning off, then charge up to 100% without interruptions.
📴 Update the firmware: Xiaomi regularly optimizes power consumption in new versions MIUI.

💡 Bonus: On phones with MIUI 13+ There's a Smart Charging feature that automatically stops charging by 80 percent, and then goes to 100 percent before bedtime. → Battery → Additionally.

FAQ: Frequent questions about Xiaomi battery

🔋 How to find out the factory battery capacity of my Xiaomi model?

You can see the factory capacity on the official Xiaomi website in the specifications of the model, on the sticker under the lid of the phone (if it is removable), in the CPU-Z app in the Battery tab (Design Capacity field), for example, the Redmi Note 11 Pro+ has a factory capacity of 4500 mAh, and Xiaomi 13 has 4500 mAh (despite the smaller body size).

⚡ Why the phone shows 100% charge, but quickly discharges?

This is a typical sign of an uncalibrated battery or controller wear. Try: Complete discharge/charging (calibration). Reset via Settings → System → Reset → Battery reset. Check the capacity through AccuBattery — if it is below 70% of the factory battery, the battery needs to be changed.

🔄 Can you replace the battery on Xiaomi yourself?

Theoretically, yes, but: 🛠️ Xiaomi requires a special glue B-7000 and plastic blades. ⚠️ Risk of damaging plumes or display during disassembly. 📄 Self-replacement removes the warranty (if it is still valid) The cost of replacement in the service: 1000-3000 rubles (depending on the model). POCO F3 Redmi Note 10 is cheaper than Xiaomi 12 Pro.

📊 What is the most accurate application for checking the battery?

According to our testing: App Accuracy Pros Pros Cons AccuBattery ⭐⭐⭐⭐⭐ Shows % wear, tracks cycles, user-friendly interface Requires calibration 2-3 days CPU-Z ⭐⭐⭐⭐ Shows voltage, temperature, technology No wear assessment MIUI Battery Doctor ⭐⭐⭐ Built-in, no need to install it doesn't work on all models

🔋 How long is the battery in Xiaomi time?

The service life depends on the intensity of use: 📱 2-3 years - with active use (charge cycles 1-2 times a day). 📱 4-5 years - with care (charging in the range of 20-80%, without overheating). After 500-800 cycles, the capacity usually falls to 70-80% of the factory, which is already noticeable in the autonomy of the plant.