How to accurately determine battery wear on Xiaomi: from codes to diagnostics

A smartphone battery is like a human heart: it gets older over time, loses capacity and keeps its charge worse. If your Xiaomi, Redmi or POCO started to run out in half a day, and used to last a day, it's time to check the state of the battery. But how can you objectively assess wear and tear without relying on subjective sensations?

In this article, you will find 5 proven ways – from hidden engineering menus to third-party apps that show the exact residual battery capacity in mAh and the percentage of wear. We will discuss what is considered normal for Xiaomi 11T, Redmi Note 12 or POCO F5 models, and when it is time to think about replacing. Without “water” – only specific instructions with explanations for beginners and experienced users.

1. Check wear through the engineering menu (#4636##)

The quickest way is to use the hidden diagnostic menu built into MIUI firmware, which is available on most Xiaomi models, including the Redmi 10, POCO X3 and newer devices.

Instructions:

1. Open the Phone app.
2. Enter the combination: ##4636### (some models may require ##6484###).
3. Select Battery Information (Battery Information).
4. Pay attention to the lines: 🔋 Level - current charge in percentage. 📊 Health – battery status (e.g., good or digital value). ⚡ Voltage - voltage (normal: 3.7-4.4 V for Li-ion).

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If the menu does not open, try entering the code through the Calculator app (enter the sequence of numbers and press =).

What do indicators mean?

• 🟢 Health: Good 100% Battery in Perfect Condition (or Nearly New).
• 🟡 Health: 80-90% - moderate wear, you can use further, but the charge is less.
• 🔴 Health: Below 80% - critical wear, replacement recommended.

2. USSD codes for Xiaomi battery diagnostics

If the engineering menu is not available, try the special menu. USSD-They work on most Xiaomi, Redmi and other devices. POCO, These commands do not require the Internet and do not affect the warranty.

Basic codes:

How to read the results:

• 📱 4200/4500 mAh (93%) — capacity 4200 mAh at the factory 4500 mAh. Wear and tear — 7%.
• ⚠️ If the capacity is below 80% of the factory capacity, the battery needs to be replaced.
• 🌡️ Temperatures above 40°C in normal use - a sign of degradation or malfunction.

3. Monitoring applications: AccuBattery, CPU-Z and others

If standard methods don't provide enough data, use third-party apps that analyze charging cycles, temperature and real battery capacity.

Top.-3 applications:

• 📊 AccuBattery shows real capacity, % wear, charge history.minus: requires calibration (multiple charge cycles).
• 🔍 CPU-Z — Battery displays voltage, charge level and temperature. Plus: no tuning required.
• 🛠️ AIDA64 — Professional tool with data on the number of charging cycles and the status of the controller.

How to use AccuBattery:

Install the app from Google Play|Charge your phone to 100% and calibrate it.|Use your smartphone in normal mode for 2-3 days|Check the Health section for wear data-->

Example of the report from AccuBattery:

Factory capacity: 5000 mAh




Current capacity: 4100 mAh




Depreciation: 18%




Score: Satisfactory (replacement is recommended after 6-12 months)

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AccuBattery shows real wear, not firmware, and it's more accurate than the engineering menu, but it takes time to collect statistics.

4.Analysis through ADB (for advanced users)

If you want the most accurate data, use ADB (Android Debug Bridge) – a method that works for all Xiaomi models, but requires a computer and basic command line knowledge.

Steps:

1. Enable USB Debugging in the developer settings (Settings → About Phone → MIUI version – press 7 times).
2. Connect the phone to the PC and start the command line.
3. Enter adb shell dumpsy battery
4. Find the lines: capacity: 4300 charge_counter: 1680000 health: 2

Transcript:

• Capacity is the current capacity in mAh.
• Health: 2 - battery status (2 = good, 3 = bad).
• charge_counter — amount of charge consumed for all time (in μAh).

adb shell dumpsys battery > battery_report.txt

5.Visual signs of battery wear

Even without diagnosis, you can suspect problems by indirect signs.

• ⚡ Fast discharge: the phone loses 20-30% of its charge in 1-2 hours on standby.
• 🔥 Overheating: the body heats up when charging or under load (games, video).
• 📉 Unstable charge: the percentage “jumps” (for example, from 50% to 30% per second).
• 🔌 Slow charging: 0 to 100% for 3+ hour (with a proper power supply).
• 💥 Battery bloating: screen or back cover "steps away" from the body.

Compare your device with the standards:

6.When to change the battery: recommendations for Xiaomi

Xiaomi says the battery is designed to last 500 to 800 charge cycles (about 2-3 years of active use), but the actual life span depends on the operating conditions.

• 🔋 Capacity below 80% of factory capacity (e.g. 3600 mAh instead of 4500 mAh).
• 📱 Working hours reduced at 2+ time (from day to 6-8 hours).
• ⚠️ System warnings about the need to replace the battery (appear in the MIUI 12+).
• 💸 Replacement costs below 30% of the price of a new phone (for example, for the Redmi Note 11, a replacement costs between 1500 and 2,500). ₽).

How much does it cost to replace:

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Xiaomi’s official service centers use original batteries with a 6-month warranty. Non-original batteries can swell or fail in 3-6 months.

FAQ: Frequent questions about Xiaomi battery wear