Battery is one of the most vulnerable spots in Xiaomi smartphones, especially after the launch of the new model. 2-3 Even if the phone turns on and holds a charge for several hours, the actual wear of the battery can reach the maximum. 40-50%, The problem is that the manufacturer often hides accurate data about the health of the battery, and the standard settings are not the same. MIUI They only show approximate figures.
In this article, we’ll take a look at all the working ways to test a Xiaomi battery, from official tools to engineering codes and third-party apps. You’ll learn how to determine the actual capacity, number of charging cycles, temperature, and even the date of battery production. The instructions are relevant for all models, from the budget Redmi Note to the flagship Xiaomi 14 and POCO F6.
1.Official method: Battery status menu in MIUI
The easiest, but also the most limited, method is to use the built-in MIUI tools. It is suitable for most Xiaomi smartphones based on Android 10 and later, but only shows basic information without detail.
To open this menu:
- Go to Settings → Battery and Performance.
- Slap the gear icon (⚙️) top-right.
- Select the Battery Status.
Here you'll see:
- 🔋 Wear rate (percentage) – if the value exceeds 25%, the battery should be replaced.
- 📊 Temperature - normal range: 25-40°C. Exceeding 45°C critically!
- ⚡ Last charging cycle – how long has it been since you connected to the network.
⚠️ Note: Some models (e.g. Redmi) 9A or POCO M3) The item "Battery status" may not be available, in which case use alternative methods from the following sections.
Engineering menu: secret codes for diagnostics
Hidden service menus provide advanced battery data, including actual capacity, voltage and number of charging cycles, which work on most Xiaomi devices, but may vary depending on the version of MIUI.
Enter the following combinations in the Phone app:
- 📱 ##4636## → Select Battery Information (shows charge level, temperature, voltage).
- 🔧 ##6484## → hardware test (Battery tab).
- 🔍 ##64663## → Advanced diagnostics (not available on all models).
The screen will display technical information.
- Battery health is battery health (e.g., good or replace soon).
- Voltage is the normal value: 3.7-4.2V. If below 3.5V, the battery is severely worn out.
- Charge counter is the actual capacity in mAh (compare with passport).
What if the code doesn't work?
Critical information: On smartphones with MediaTek processors (such as Redmi Note 12 or POCO X5), code ##6484## can cause a network reset. Don't use it unless you're sure about the chipset model!
3. Applications for deep diagnostics
If the built-in MIUI tools don't give you the full picture, use third-party utilities to show you the data the manufacturer is hiding: the exact date of battery production, the number of full charging cycles, and even the history of peak temperatures.
Top.-3 tested applications:
| Annex | Key functions | Link (Google Play) |
|---|---|---|
| AccuBattery | Wear monitoring, autonomy forecast, charging history | Download |
| Battery Guru | Capacity test, real-time temperature, overheating notifications | Download |
| CPU-Z | Data on voltage, process of the battery (Li-Po/Li-Ion) | Download |
How to use AccuBattery (the most accurate tool):
- Install and open the application.
- Connect your phone to charge and wait 100%.
- In the Health section, you will see a wear score (for example, “85% of the original capacity”).
- In the History tab, check the discharge schedules - sharp jumps indicate a malfunction.
☑️ Preparation for battery test
⚠️ Note: Apps like AccuBattery require multiple charge-discharge cycles for precise calibration!
4. Verification through ADB: for advanced users
If you want the most accurate data directly from the system, use ADB (Android Debug Bridge), which is suitable for all Xiaomi devices, but requires a connection to a computer.
Instructions:
- Turn on Developer Mode (7 times tap the MIUI version in your phone settings).
- Activate Debugging by USB in the Developer Menu.
- Connect your phone to your PC and open the command line (Windows) or terminal (Mac/Linux).
- Enter the command: adb shell dumpsy battery
In conclusion, pay attention to the lines:
- Level is the current charge in percentage.
- Voltage: Voltage (for example, 4012000 = 4.012V).
- Temperature is a temperature in tenths of a degree (for example, 320 = 32.0°C).
- charge_counter — actual capacity in mkAh (divided by 1000 for mAh).
For the calculation of wear, compare charge_counter It's got a passport battery capacity, like Xiaomi. 13 passport-capacity 4820 mAh, ah. charge_counter show 3500 mAh, wear is a bit of a drag:
(4820 - 3500) / 4820 × 100% ≈ 27.4%adb shell cat /sys/class/power_supply/battery/ueventIt works with most devices with MIUI 12+.-->
5. Visual Diagnostics: When is the Battery Time to Change
Even without special tools, you can determine the critical state of the battery by external signs.
- 🔥 Overheating – the phone is heated above 45°C when charging or working in plain.
- ⚡ Fast discharge – charge drops from 100% to 20% in 1-2 hours without load.
- 📉 Unstable charge level – interest jumps (for example, from 50% immediately to 20%).
- 🔌 Charging problems – the phone does not recognize the cable or only charges when it is off.
- 💥 Battery bloating – phone case deformed, screen “steps away” from frame.
If you notice at least 2-3 signs from the list, the battery must be replaced, and bloating is especially dangerous - this can lead to fire or damage to the internal components of the phone.
How to check for bloating:
- Place your phone on a flat surface (such as a table).
- Easily tap the screen around the edges - if it "plays" or flexes, the battery is swollen.
- Light the flashlight on the side - between the body and the glass will be visible gap.
💡
A bloated battery is not only a loss of autonomy, but also a risk of damage to the motherboard. On Xiaomi models with a non-removable battery (for example, the Mi 11), replacing it will cost 2-3 times less than repairing after a short circuit.
Comparison with passport data: depreciation table
To see how critical your battery wear is, compare it to Xiaomi’s standards, which say the battery is faulty when it drops below 80% of its original capacity.
| Level of wear and tear | Residual container | Symptoms | Recommendations |
|---|---|---|---|
| 0–15% | 85–100% | Minor reduction of working hours | Continue to use, calibrate once every 3 months |
| 16–30% | 70–84% | Fast discharge during loading (games, videos) | Limiting Resource-intensive Tasks, Replacing Battery Within a Year |
| 31–50% | 50–69% | The phone discharges in 2-3 hours, overheats | Urgent replacement! Risk of bloating and damage to the board |
| 51%+ | Less than 50% | Does not hold the charge, turns off at 20-30%, deformation of the body | Emergency replacement! Use is dangerous. |
For an accurate definition of the passport capacity of your model, use the table:
- Redmi Note 12 Pro+ – 5000 mAh
- Xiaomi 13 Ultra - 5000 mAh
- POCO F5 - 5000 mAh
- Redmi 10A - 5000 mAh
- Xiaomi 12T - 5000 mAh
7. Frequent errors in battery inspection
Many users make mistakes that distort the results of their diagnosis.
- 🔋 Check the charge immediately after disconnection from the network - the battery voltage stabilizes after 5-10 minutes.
- 🌡️ Test at extreme temperatures - in the cold or in the heat, the indicators will be inaccurate.
- 📴 Use non-original chargers – they can show a false charge level.
- 🔄 Resetting battery statistics without needing to - it knocks the calibration.
Also avoid popular myths:
- ❌ «You need to completely discharge the phone once a month, which is harmful to modern lithium polymer batteries.
- ❌ «Charging up to 100% kills battery – one full cycle a day is not critical if you do not keep charging for days.
- ❌ «Battery-saving apps extend its life" - most only slow down the phone.
Keep the charge level in the range of 20-80%.
Avoid overheating (do not play while charging).
- Use original cables and adapters.-->