Why it is important to monitor the battery status of Xiaomi
Lithium-ion and lithium-polymer batteries in Xiaomi, Redmi and POCO smartphones degrade even under ideal operating conditions. On average, battery capacity declines by 20-30% over 2-3 years of active use, a normal process associated with chemical reactions inside the battery. However, some users experience premature wear and tear of up to 50% or more in 12-18 months, which is already considered a critical indicator.
The main causes of accelerated degradation:
- 🔥 Constant charging to 100% and discharge below 10% (deep cycles destroy battery structure)
- ⚡ Use of unoriginal chargers with inappropriate currents
- 🌡️ Smartphone overheating (especially when gaming or charging in the heat)
- 📱 Long-term storage of a discharged phone (below 40% charge)
Checking battery wear on Xiaomi will help:
- 📊 Evaluate the real capacity of the battery compared to the factory
- 🔧 Decide to replace the battery before it suddenly shuts down
- 📈 Optimize charging mode to extend service life
Method 1: Hidden Engineering Menu (code ##4636##)
The fastest method, running on most Xiaomi devices running MIUI 12-14 (including Redmi Note 10/11/12, POCO F3/F4/F5, Xiaomi 11T/12/13). The engineering menu provides data directly from the battery controller, without the need to install third-party apps.
Instructions:
- Open the phone application
- Enter the combination ##4636## (some models may require ##6484##)
- In the menu that appears, select Battery Information.
Key parameters that you need to pay attention to:
- 📋 Level - current level of charge in percentage
- 🔋 Health - battery status (ideal indicator - Good)
- 🔌 Voltage - voltage (normal for Li-ion: 3.7–4.2V)
- 🔄 Technology - battery type (should be Li-ion or Li-poly)
Check the correct code entry |Reboot phone |Update MIUI to the latest version |Try alternative code ##6484##
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⚠️ Note: Some models (e.g. Xiaomi 13 Ultra or Redmi) K60 Pro) the engineering menu may be blocked by the manufacturer, in which case use alternative methods from the following sections.
Method 2: AccuBattery application (charging cycle analysis)
AccuBattery is one of the most accurate battery health monitoring applications that analyzes real capacity based on charging/discharge data. Unlike standard MIUIs, it shows accurate wear in milliamp hours (mAh) rather than abstract percentages.
How to use:
- 📥 Install AccuBattery from Google Play
- 🔄 Charge the phone before 100% Wait for the calibration (may take a while). 2-3 cycle)
- 📊 Go to the Health tab (Health)
- 🔍 Please note the Estimated Capacity parameter)
Decoding of indicators:
| Parameter | Normal value. | Critical significance |
|---|---|---|
| Design capacity | 90-100% of the factory | Down below 70% |
| Wear (Wear) | 0-10% | More than 30% |
| Temperature. | 20-40°C | Above 45°C. |
| Discharge speed | 0.5-1% per hour on standby | More than 2% per hour |
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For more accurate results, use AccuBattery for at least 5 full charge-discharge cycles. The application learns the characteristics of your battery and adjusts the performance.
Method 3: ADB-Teams for Advanced Users
If the engineering menu is locked and third-party apps show inaccurate data, you can get battery information through Android Debug Bridge (ADB), a technique that requires connecting the phone to a computer, but gives the most detailed details, including the current capacity in mkAh and the number of charging cycles.
Step-by-step:
- 🖥️ Install. ADB Tools on PC
- 📱 Turn on Debugging. USB In Settings → The phone. → Version. MIUI (Press 7 times, then return to Additional → For developers)
- 🔌 Connect your phone to your computer and confirm your trust in the device
- 🐍 Open the command line in the folder with ADB enter:
adb shell
dumpsys batteryIn conclusion, find the following parameters:
- 📊 Capacity - current charge in %
- 🔋 charge_counter — The actual capacity in mkAh (divided by 1000 form)
- 🔄 cycle_count — number of full charge cycles
- 🌡️ temperature - battery temperature in tenths °C
How to calculate the real wear according to ADB
⚠️ Note: Some Xiaomi models (especially with the MIUI 14) access to the full battery data via ADB In this case, use the alternative command: adb shell dumpsys batterystats
Method 4: Integrated MIUI diagnostics (for new models)
Starting with MIUI 13, Xiaomi has added a built-in battery diagnostic tool that is available through Settings → Battery. However, this method only shows the general condition ("Good", "Mediocre", "Bad"), without specific wear figures.
How to check:
- ⚙️ Go to Settings. → Battery and productivity → Battery status
- 📊 Click Battery Diagnosis (on some models, the item may be called Health Check)
- 🔍 Wait until the analysis is completed (it will take). 1-2 minute)
Transcription of results:
- 🟢 Good – wear less than 10%, battery in perfect condition
- 🟡 Average wear and tear 10-30%, It is recommended to optimize the charging mode
- 🔴 Poor - wear more than 30%, battery replacement is required
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Built-in MIUI is the safest method, but the least informative. For accurate data, use the combination of the engineering menu and AccuBattery.
Method 5: Hardware Testing through Tester (for workshops)
If you need 100% accurate data (for example, before selling a phone or for warranty repairs), it is better to contact a service center that uses professional battery testers, such as:
- 🔧 ZXW Tool – shows real capacity, internal resistance and number of cycles
- 🔋 Battery Tester BT-3563 — Analyzes degradation by volt-ampere characteristic
- 📊 USB-Tester KCX-017 — Measure current and voltage in real time
What's being checked on the service:
- 🔍 Real capacity (compared to passport)
- 🔄 Internal resistance (norm: 50-200 MOM; higher 300 Mohm - critical)
- 🌡️ Self-discharge (normal: no more than 5% per day in the off state)
- 🔋 Idle voltage (should be) 3.7-3.8V upon 50% charge)
⚠️ Attention: Some craftsmen suggest that the battery be rebuilt by flashing the controller. This doesn't work -- the degradation of lithium-ion cells is irreversible. The only solution for heavy wear is to replace the battery.
What to do if the battery is critical (over 40%)
If the test shows wear and tear of more than 40%, the battery is considered severely degraded.
- 🔋 Replace the battery at Xiaomi’s official service center (cost: 1500-4000 ₽ model-wise)
- 📵 Avoid deep discharges – charge your phone when you are in the 20-30% and disconnect from the network on 80-90%
- 🌡️ Control the temperature – do not use your phone when charging in the heat
- 🔌 Use original chargers with Quick Charge or Turbo Charge support
Signs that the battery needs to be changed urgently:
- 🔥 The phone is overheated even with light load
- ⚡ Suddenly shuts down when 20-30% charge
- 📉 Charging too fast (charging too fast) 20-30 minute 100%)
- 🔋 Bloating of the body (seen by the divergence of the seams or the bulge of the screen)
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After replacing the battery, perform 2-3 full charge-discharge cycles (0-100%) to calibrate the controller, which will help the system to correctly display the charge level.