How to check the battery on the smartphone Xiaomi: all ways with explanations

Battery is one of the most vulnerable components of a smartphone that loses capacity and discharges faster over time. Owners of Xiaomi, Redmi and POCO devices often face the question: how to objectively assess the state of the battery without resorting to disassembling the phone? In this article, we will examine all available methods of verification, from built-in MIUI tools to third-party applications and engineering teams.

It is important to understand that you can “view the battery” on several levels: check the current charge in percentage, find out the real capacity (which decreases with each charging cycle), diagnose the discharge rate or identify software errors that interfere with proper operation.

This article is relevant for all modern Xiaomi models, including the Redmi Note 12/13 series, POCO F5/X5, Mi 11/12/13 and older devices based on MIUI 12-14. Some methods (for example, engineering menu) may not work on some firmware – we will warn you about this in advance.

1. Check the battery status through MIUI settings

The easiest way to get basic information about a battery is to use the built-in MIUI tools, which won’t show the exact capacity in milliamp hours (mAh), but will help estimate charge consumption and identify abnormal behavior.

To open up the statistics:

1. Go to Settings → Battery and Performance.
2. Slip on the consumption chart (at the top of the screen).
3. Select the Battery Use tab for app detailing.

Here you'll see:

• 📊 Discharge schedule for the last 24 hours or weeks (depending on version) MIUI).
• ⚡ List of applications that consume the most energy (if one of them consumes the most energy) >15% in the background is a reason to be wary).
• 🔄 Screen time and total activity time (helps compare with previous days).

Notice unusual discharge surges — for example, if the phone loses 10% of its charge in 30 minutes of standby mode — this could indicate software errors (such as a hung app) or hardware problems (battery wear, short circuit).

⚠️ Attention: B MIUI 14 and newer some models (e.g. Redmi Note 12 Pro)+) They hide detailed statistics on applications, and to see them, you might need to turn off battery optimization in the developer settings.

2. How to find out the real capacity of the battery (without root)

The built-in MIUI tools don't show the actual battery capacity -- only the percentage of charge. To find out how many milliamp hours (mAh) left of the original capacity, you'll need third-party apps or an engineering menu.

The most reliable way to do this without root rights is to use the AccuBattery app (available on Google Play), which analyzes the charging cycles and calculates battery wear.

1. Install AccuBattery and provide all the permissions requested.
2. Charge your phone to 100% and use it normally up to 20-30%.
3. Open the app and go to the Health tab.

Example of a report in AccuBattery:

• 🔋 Design capacity: 3800 mAh (originally 4500 mAh).
• 📉 Wear: 15.5% (normal for a 1.5-2-year battery).
• 🔄 Number of charging cycles: 312 (the more, the more wear and tear).

Another option is the appendix AIDA64 (It shows the current voltage, the battery temperature and the battery manufacturer (useful if you suspect a fake). AIDA64: Battery → Status.

⚠️ Note: If AccuBattery shows wear and tear >30%, and the phone runs out in 3-4 hours with moderate use - it's time to change the battery.

3. Engineering menu: hidden data about the battery

Xiaomi smartphones have a hidden engineering menu (Engineer Mode) where you can see detailed information about the battery, including voltage, temperature and state of the charge controller. This method does not require root, but you need to be careful – wrong actions can disrupt the phone.

How to open the engineering menu:

1. Open the phone app and enter the combination: ##4636##
2. Select Battery Information (Battery Information).

On this menu you will see:

If the state is anything other than Good or Normal, that's a cause for concern. For example, Overvoltage may indicate a faulty charge controller.

⚠️ Warning: Do not change any parameters in the engineering menu unless you know their purpose! For example, a battery reset can lead to incorrect display of interest and sudden shutdowns.

4. Battery check via ADB (for advanced users)

If you want the most accurate data on the battery, you can use ADB (Android Debug Bridge), which requires connecting the phone to a computer, but gives you access to hidden parameters that do not show the application.

Instructions:

1. Enable USB debugging in the developer settings (Settings → About Phone → MIUI version – tap 7 times, then go back to Additional settings → For Developers).
2. Connect your phone to your PC and open the command line (Windows) or terminal (macOS/Linux).
3. Enter the command: adb shell dumpsy battery

In conclusion, pay attention to the following lines:

• 🔢 level: 78 - current charge in percentage.
• ⚡ Voltage: 3847 - voltage in millivolts (3847 mV) = 3.847 In).
• 🌡️ temperature: 308 — tenths of a degree Celsius (308 = 30.8°C).
• 🔄 Technology: Li-polymer – type of battery.
• 📊 charge counter: 2500 - approximate capacity in milliamp hours (may be inaccurate).

For a more detailed analysis, use the command:

adb shell dumpsys batterystats

It will show discharge history, application consumption and other system metrics.

⚠️ Note: If the health parameter is in output ADB significance 2 (HEALTH_DEAD), This means that the battery is completely out of order and needs to be replaced. 3 (HEALTH_OVERHEAT) pointing out.

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If the adb shell dumpsys battery command returns the error, try adb root first (requires an unlocked bootloader).

5. Visual inspection and signs of battery wear

Sometimes you can evaluate the state of the battery without software tools, by external signs.

Physical symptoms of wear and tear:

• 🔋 Battery bloating: if the phone body has become convex, and the screen "steps away" from the frame - this is a critical sign that requires immediate replacement of the battery!
• ⚡ Spontaneous shutdowns: the phone turns off at 20-30% charge, although it used to work up to 0%.
• 🔥 Overheating: The battery heats up strongly even at minimal load (e.g., during a bell).
• ⏳ Accelerated discharge: in 1 hour downtime is lost >5% charge (with Wi-Fi and mobile data turned off).

Programmatic symptoms:

• 📉 Incorrect percentage display: charge jumps (for example, from 50% to 20% per second).
• 🔄 Slow charging: the phone is charging >3 hours from the original ZU.
• 🚫 Charging errors: A notification appears saying "Charging suspended. Battery temperature too high/low".

If you notice at least 2-3 of these signs, the probability of battery wear is 80-90%.

1. Check the capacity through AccuBattery or ADB.
2. If the wear is >30%, contact the service center for replacement.

⚠️ Warning: Bloated battery can damage the motherboard or screen if you continue to use. If the phone case is deformed, do not try to disassemble it yourself - contact the specialists.

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Battery bloating is not only a loss of capacity, it's also a risk of fire, and even if the phone is still working, it becomes dangerous to operate.

6.How to extend the life of the Xiaomi battery: 7 rules

Even if your battery is still in good condition, following a few rules will help slow its wear and life by 20 to 30 percent, and these recommendations are relevant for all lithium polymer batteries, including those used in Xiaomi.

Optimal operating conditions:

• 🔋 Keep the charge in the range of 20-80%, constant charging to 100% and discharge to 0% accelerates degradation.
• ⚡ Use original or certified RAM. Cheap charging can deliver unstable voltage.
• 🌡️ Avoid extreme temperatures. Do not leave your phone in the sun or in the cold (optimum: 10-35)°C).
• 📵 Disable unnecessary functions: GPS, Bluetooth, 5G and background activity of applications if not used.

What to do categorically can not be:

• 🚫 Charge your phone all night. Modern smartphones turn off power at 100 percent, but long-term network connection speeds up wear and tear.
• 🔥 Use your phone while charging for games/video.This raises the battery temperature.
• 🔄 Discharge until completely shut down. Deep discharge is more harmful than frequent recharging.

MIUI has a built-in charging optimization feature (Settings → Battery & Performance → Optimized Charging) that allows the phone to automatically limit charge to 80% at night and load to 100% by morning.

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If you keep your phone without using it (like a spare), charge it up to 50% and turn it off.Full discharge or 100% charge when stored long is detrimental to the battery.

7.When it's time to change the battery: checklist before replacement

If the diagnostics show critical battery wear, don't rush to bring your phone to the service. Go through this checklist to make sure that the battery is the problem:

Cost and replacement options:

When choosing a battery, pay attention to:

• 🔋 Capacity: Must match the original (e.g. 5000 mAh for Redmi Note 11 Pro)+).
• 🏭 Manufacturers: Reliable Brands — ATL, SDI, Lishen.
• 📅 Production Date: Battery older than 6 months may already be partially discharged.

If you decide to change the battery yourself, be sure to use plastic blades to carefully remove the lid and a dryer to soften the glue. The network has detailed disassembly guides for each model - for example, for the POCO X3 Pro or Mi 11 Lite.

FAQ: Frequent questions about Xiaomi battery