How to Check the Battery Remainder on Xiaomi: Everything from Hidden Codes to Apps

Over time, the battery capacity in Xiaomi, Redmi or POCO smartphones inevitably decreases — this is a normal process of degradation of lithium-ion batteries. But how do you know how worn your battery is? The real remaining capacity may differ from what the standard charge indicator of 1% or 100% shows. For example, at 80% of wear, the phone will discharge 2 times faster than the new one, even if the screen displays "100%".

In this article, we’ll look at all the current ways to check, from hidden engineering menus to specialized applications, how to interpret performance, what is considered the norm for Xiaomi batteries of different ages, and what hidden MIUI features will help to extend the life of the battery, and why some methods (for example, the popular code # #4636##) do not work on new models after MIUI 14.

If your smartphone discharges in a few hours, warms up when charging or suddenly turns off on the phone 20-30% — It's a direct signal to check the battery status, but even if there's no problem, a preventive diagnosis is once in a while. 6 This will help you avoid unpleasant surprises.

1. Check through hidden engineering menu (works on 90% of models)

The most reliable way is to use the hidden service menu that is found in all Xiaomi smartphones based on Qualcomm (most models, except for some flagships on MediaTek), this method does not require root rights and works even on a locked bootloader.

Instructions:

1. Open the phone application (standard call).
2. Enter the code: ##4636###.
3. In the menu that opens, select Battery Information.
4. Please note the line “Battery health” or “Capacity”.

⚠️ Attention: On models with MIUI 14+ (And if you have a product that's released after 2023, it might not work, because the manufacturer has restricted access to the engineering menu, so you can go to the next way.

In the menu you will see a few key parameters:

• 🔋 Level - current charge in percentage (not to be confused with real capacity!).
• 📊 Health: Percentage of wear and tear (e.g., “Good” when 90-100%,"Bad at lower 70%).
• ⚡ Voltage – normal value for Xiaomi 3.7-4.4 V. If below 3.5 V – the battery is critically discharged.
• 🔄 Technology – Li-ion or Li-Po must be specified.

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If nothing happens after you enter the code, try using the alternative code ##284##, which works on some Redmi Note 11/12 and POCO X4/X5 models.

2.Use of the application "Battery and performance" (official method from Xiaomi)

Xiaomi has built its own battery monitoring utility into MIUI, but many users are unaware of its existence, an app called Battery & Performance, and is available on all smartphones with MIUI 12 and up.

How to open it:

1. Go to Settings. → Battery.
2. Slap the icon. ⚙️ ("Battery settings") in upper right corner.
3. Select "Battery Health" (Battery Health)

Here you will see two key indicators:

• 📉 Current capacity – for example, 3,800 mAh out of 4,000 mAh (meaning 95% health).
• 📅 Number of charging cycles - the norm to 500 And then the cycles for Xiaomi. 800 cycles, the capacity usually falls to 70-80%.

⚠️ Note: Some models (e.g. Xiaomi 13 Pro or Redmi) K60) This partition may be hidden. To activate it, follow the following steps:

Enable Developer Mode (7 times tap the MIUI version in Settings → About Phone)

Back to Settings → Additionally. → For developers

Activate the option "Show battery status"

Reboot the phone.-->

If the app shows a capacity below 80% of the factory capacity, this is an occasion to think about replacing the battery, and the critical threshold is considered to be 60%: when this wear is done, the battery can suddenly turn off even at 30-40% charge.

3. Verification through ADB-Teams (for advanced users)

The Android Debug Bridge (ADB) method is suitable for those who are willing to connect a smartphone to a computer, and provides the most accurate data, including the actual voltage, temperature and number of charging cycles.

Step-by-step:

1. Download and install ADB Tools on PC.
2. Turn on USB Debugging on your phone (Settings → About Phone → MIUI Version → 7 times tap, then go back to Settings → Additional → For Developers).
3. Connect your phone to your PC and type in the command line: adb shell dumpsys battery

In conclusion, pay attention to the following parameters:

⚠️ Note: If the health parameter shows a value 4 or 7 — It means that the battery has deteriorated and needs to be replaced. charge_counter — This is the actual μAh capacity, for example, if the factory capacity is 5000 mic (5 000 000 μAh, ah charge_counter show 3 500 000 — wear-out 30%.

4. Applications for battery diagnostics (top)-3 tested)

If you don't want to mess with codes or ADB, you can use third-party apps, and we tested dozens of utilities and selected three of the most accurate ones for Xiaomi smartphones.

The best applications for checking the battery:

• 📊 AccuBattery shows real capacity, wear and discharge rate. MIUI 14 and newer. Download to Google Play.
• 🔍 CPU-Z — The Battery section shows voltage, technology and health. Free, no advertising.
• 🛠️ Battery Guru – monitors charging cycles and temperature, useful for tracking long-term degradation.

⚠️ Attention: Some applications (e.g, AIDA64) Incorrect data on Xiaomi smartphones due to restrictions MIUI. If the capacity values in the application and the engineering menu are very different (by more than 10%), trust the official methods (sections 1-3).

Example of the report from AccuBattery for Redmi Note 11 Pro+ after 1.5 years of use:

• 🔋 Factory capacity: 5000 mAh
• 📉 Current capacity: 4100 mAh (82% health)
• 🔄 Charging cycles: 412
• ⚡ Average discharge rate: 12%/hour (in active use)

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If the app shows a capacity below 3,500 mAh for a 5,000 mAh battery, that's critical wear, and then the battery could swell or cause the phone to overheat.

5.Visual signs of battery wear (when urgent action is needed)

Even without diagnosis, you may suspect battery problems for indirect reasons, and if you notice any of these symptoms, check the battery immediately with one of the methods described above:

Alert signals:

• 🔥 The phone warms up strongly when charging or while making calls (especially in the camera area - there is a battery located there).
• ⚡ The battery is discharged on 20-30% One hour in standby (without active use).
• 🛑 The smartphone is off on 15-30% charge and not activated without connection to charging.
• 📱 The case is swollen (check whether the phone is flat on the table; if it sways, the battery is deformed!).
• ⚡ Charging is jerky (1%, then 5%, then again 1%) or interrupted.

⚠️ Note: If the phone body is swelling, you can not:

• Continuing to use the device is a risk of fire!
• Try to open the back cover yourself (on models with a non-removable battery).
• Charging the phone can aggravate the deformity.

In this case, immediately take the phone to the service center to replace the battery.

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

Even if your battery is still in good condition, following simple rules can help slow wear and keep capacity for years to come, based on Xiaomi’s official guidelines and battery manufacturers’ research.

Rules for battery care:

• 🔌 Avoid deep discharge (below 10%) and full charge (up to 100%.
• ☀️ Do not leave your phone in the sun or in your car – overheating is above 50.°C destroys the battery.
• 🔋 Use original chargers (or certified Quick Charge-enabled ones). Cheap charges spoil the power controller.
• 📵 Turn off your mobile data, Wi-Fi and Bluetooth overnight if you don’t use it.
• 🔄 Calibrate the battery once every 3 months (full discharge-charging cycle).
• 🛌 Don’t leave your phone rusting all night – 100% off the network.
• 📦 If you keep your phone without using it (such as a spare phone), charge it up to 50% and turn it off.

⚠️ Attention: On Xiaomi smartphones with support for fast charging (33W, 67W, 120W) It is not recommended to use maximum power constantly. 12T Pro or Redmi K50 Gaming is better to limit the charging on 30W — This will reduce heating and extend the battery life.

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MIUI 14+ has a hidden function called Adaptive Charging, which automatically limits the charge to 80% at night. To turn it on, go to Settings → Battery → Battery Settings → Adaptive Charging.

7.When it is time to change the battery: criteria and cost of replacement

If the diagnostics show that the battery capacity has dropped below 70-75% of the factory capacity, it's time to think about replacing it. But how do you know that the battery is already dangerous to the phone?

Signs of critical wear:

• 🔋 Capacity below 60% of factory capacity (e.g. 2400 mAh instead of 4,000 mAh).
• 📱 The phone does not hold a charge for more than 2-3 hours with a minimum load.
• 🔥 Battery swollen (even a little bit – this is a risk of damage to the screen or motherboard).
• ⚡ Charging is very slow (for example, 1% in 10 minutes).

The cost of replacing the battery in 2026:

⚠️ Note: When replacing the battery, be sure to ask:

• Original battery (the box must have the Xiaomi logo and serial number).
• Work guarantee (minimum 3 months).
• Check the charging controller (often fails with the battery).

Avoid cheap ones – they may swell in a few months or not support fast charging.

Frequent questions about Xiaomi battery