You've noticed that Xiaomi's smartphone is running out faster than before, and maybe it's battery wear that's a natural process that happens even when used with care. Manufacturers say lithium-ion batteries lose up to 20 percent of their capacity after 500 full charge cycles, but how do you check the exact percentage of wear on your device?
In this article, we’ll look at all the current ways to diagnose a battery on Xiaomi, Redmi and POCO, from standard MIUI tools to hidden engineering menus and third-party apps. You’ll learn not only how to view current capacity, but also how to interpret the data: when the battery is still alive and when to think about replacing. All methods are tested on MIUI firmware 12-14 and are relevant for models from 2019-2026.
1. Standard method: Battery status menu in MIUI
The easiest way is to use the built-in MIUI tools. It won’t show the exact percentage of wear and tear, but it will give an idea of the battery’s health through the “State” parameter.
Instructions:
- 📱 Open the Settings. → Battery and performance.
- 🔍 Scroll down and select Battery Status (on some firmware, the item may be called Battery Health).
- 📊 The system will show one of three states: Good - wear is minimal (0-15%); Medium - capacity is reduced by 15-30%; Bad - wear exceeds 30%, replacement is recommended.
⚠️ Note: Some models (e.g. Redmi Note 10 Pro) POCO X3 Pro) this section may not be available, in which case proceed to the following methods.
2. Engineering menu (#4636##): Hidden battery data
The engineering menu is the service area of Android, where the device’s technical parameters, including detailed battery information, are hidden.The method works on all Xiaomi smartphones, but it requires caution: do not change the settings unless you are sure of their purpose!
How to open it:
- Open the Phone app.
- Enter the combination: ##4636## (some firmware may require ##6484###).
- Select the Battery Information tab.
What to watch on the menu:
| Parameter | What does it mean? | Normal values |
|---|---|---|
| Level | Current charge in percentage | Corresponds to the indicator on the screen |
| Health | Battery status (key parameter!) | Good - wear up to 15%Unknown - data is not available |
| Voltage | Voltage in millivolts | 3700-4200 mV (depending on model) |
| Temperature | Battery temperature | 20-45 ° C (above 50 ° C - overheating!) |
🔹 Important: If the Health field says Unknown, it doesn’t always mean a problem – some firmware MIUI They block the output of this parameter. ADB (section).
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If the engineering menu doesn’t open, try entering the combination through the Google Phone app (can be installed from the Play Market).
3. Diagnostic applications: AccuBattery and AIDA64
The side of the utility often provides more detailed information than standard MIUI tools. We recommend two proven applications:
1. AccuBattery (free version with restrictions)
- 📊 Shows the real battery capacity in mAh and the percentage of wear.
- 🔋 Tracks charging cycles and discharge speed.
- ⚠️ Calibration: Use the app for at least 2-3 days for accurate data.
2. AIDA64 (paid version)
- 🛠️ Shows Design Capacity (factory capacity) and Full Charge Capacity (current).
- 📱 It works without root rights, but some Xiaomi models may require unlocking the bootloader.
- 🔍 Additionally displays battery technology (Li-Poly, Li-Ion) and manufacturer.
⚠️ Attention: Apps can show different wear values, and this is due to algorithms, so focus on the average or the data from the engineering menu.
Charge your smartphone to 100% | Discharge to 15-20% without recharging |Repeat cycle 2-3 times | Launch the application and wait for analysis-->
4. ADB-Teams: Accurate data for advanced users
The Android Debug Bridge (ADB) method is suitable for those who are ready to work with the command line, and it gives the most accurate data, including the actual capacity and number of charging cycles.
Step-by-step:
- Install ADB Tools on your PC.
- Enable USB Debugging on your smartphone: Settings → About Phone → MIUI version (click 7 times to activate Developer Mode), then Settings → Additional → Developers → Debugging over USB.
- Connect your phone to your PC and execute the command line: adb shell dumpsys battery
Look for the following parameters in the output:
Health: 2 (GOOD) - Battery status
Capacity: 4500 - Current capacity in mAh
charge_counter: 1234567 - The amount of charge passed through the battery (in microamps)🔹 Transcription:
- Health: 2 - battery in good condition (1 unknown, 3 poor).
- Capacity – Compare with factory capacity (for example, for Redmi Note 11 Pro+ is 4500 mAh).
- charge_counter — divide 1000 and to the factory container to get an approximate number of cycles.
What if the ADB does not recognize the device?
5. Codes for USSD-Requests: Quick verification
Some Xiaomi models support some of the USSD-These combinations don't work on all devices, but it's worth a try:
- 🔢 ##6484## - Battery test (shows voltage, temperature, state).
- 🔢 ##3644633## - Information about the firmware version and hardware (including battery).
- 🔢 ##4636## - Engineering menu (duplicates the method from section 2).
⚠️ Note: New models (e.g. Xiaomi 13 or Redmi) K60) If nothing happens after you enter, move on to other methods.
💡 Advice: If USSD-The codes don’t work, try typing them through the Google Phone app (install it from the Play Market if it’s not preinstalled).
When to change the battery: table of critical values
You know the percentage of wear -- what's next? Go to this table to see if it's time to think about replacing it.
| Percentage of wear and tear | Real capacity (from factory) | Signs. | Recommendations |
|---|---|---|---|
| 0–15% | 85–100% | No noticeable problems. | Keep using, keep an eye on the temperatures. |
| 15–30% | 70–85% | Fast discharge with active use | Optimize background processes, avoid overheating |
| 30–50% | 50–70% | Phone discharges in 3-4 hours, spontaneous shutdowns | Prepare to be replaced, avoid deep discharges |
| 50%+ | Less than 50% | Does not hold the charge, bloating, overheating | Urgent replacement! Risk of damage to the fee |
🔹 Important: If the battery is swelling (the body of the smartphone began to "spark"), immediately stop using! This is dangerous to health - the risk of fire or explosion.
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Even with wear and tear of 20-30%, the battery can be “reanimated” with proper charging: avoid discharges below 20% and charging above 80%, use original adapters.