Have you encountered a situation where Xiaomi or Redmi spontaneously shuts down, although the battery is still enough? This problem is familiar to many owners of smartphones based on MIUI, the branded shell from Xiaomi. Automatic shutdown can occur due to battery failures, firmware errors or activated power saving functions. In this article, we will analyze all possible causes and offer 5 working ways to disable auto-switching, including hidden settings and technical solutions.
It's important to understand that the problem isn't always hardware-related. Often the software constraints that Xiaomi puts in place to extend battery life are to blame. For example, Automated Shutdown at low charge can work even with 20-30% of the battery if aggressive power saving modes are activated. We'll show you how to fix this without losing functionality.
This article is suitable for all modern models, from the budget Redmi Note 12 to the flagship Xiaomi 14 Ultra. Instructions are relevant for MIUI 13/14/15 and newer versions. If your phone turns off in the cold, when charging or after upgrading, here you will find a solution.
Why Xiaomi is Shutting Down: 7 Reasons Why It Is Free
Before you start setting up, you need to identify the root of the problem, and you can have a software or hardware factor that causes you to shut down.
- 🔋 Battery wear: after 500-800 The battery capacity drops and the phone turns off when 15-30% The indicator is more powerful, though the indicator shows more.
- ⚡ Power controller failures: The chip responsible for power distribution can give false discharge signals.
- ❄️ Overcooling or overheating: Xiaomi automatically shuts down at temperatures below 0°C or higher than 45°C. Protecting components.
- 📱 Firmware errors: bugs in MIUI This can lead to sudden reboots, especially after updates.
- ⚙️ Aggressive energy saving settings: Ultra-energy saving or Extended battery modes force the device to shut down.
- 🔌 Charger problems: Unoriginal cables or adapters can cause voltage surges.
- 🛠️ Mechanical damage: Falls or moisture often lead to disruption of battery contacts.
If your Xiaomi only shuts down in the cold, the problem is most likely a lithium-ion battery — at low temperatures, its resistance increases dramatically. If you turn off charging, either the cable or the power controller is to blame. And if the phone turns off at 20-40% charge, it is a sign of battery wear or calibration failure.
⚠️ Warning: If the phone turns off at any charge level and does not turn on without connecting to a charge, this may indicate critical battery wear.
Method 1: Turning off automatic shutdown in MIUI settings
The easiest way is to deactivate the built-in power saving features that can force the device to shut down, which are hidden in different parts of MIUI, and the combination of these often solves the problem.
Follow the step-by-step instructions:
- Open Settings → Battery and Performance.
- Go to Battery Settings → Energy Saving Modes.
- Turn off the options: 🔄 Automatic switching of modes 🛑 Ultra-energy conservation ⚡ Extended battery mode (if any)
Battery settings
Optimizing charging
Adaptive charging
Limitation of charging
Then check if the problem persists. If the phone still turns off, move on to the next way.
Disable "Automatic mode switching" |Deactivate "Ultra-energy saving" |Switch off "Adaptive charging" |Check the temperature of the battery-->
Method 2: Calibration of the battery through the engineering menu
If the charge indicator shows incorrect values (for example, the phone turns off at 30%, and after turning on it shows 0%), calibration of the battery is required, this method resets the controller data and restores the accurate readings.
For calibration:
- Charge your phone to 100% and leave it on charge for another 1-2 hours.
- Turn off the charger and go to the Engineering menu: ##4636###
- Select Battery Information and write down the current values of Charge Level and Voltage.
- Discharge the phone before it automatically shuts down (do not turn it on until it is completely discharged!).
- Connect to the original charger and charge up to 100% without interruptions.
- Repeat the login to the engineering menu and compare the values – they should become more accurate.
This method helps in 80% of cases where the problem is due to incorrect data controller, if after calibration the phone still turns off at 20-30% charge, the reason lies in the wear of the battery.
What to do if the engineering menu is not opened?
Method 3: Reset battery settings via ADB (for advanced)
If standard methods don’t work, you can reset your battery settings via Android Debug Bridge (ADB), which requires connecting your phone to your computer, but provides a deeper reset than the engineering menu.
Instructions:
- Turn on Developer Mode: Go to Settings → About Phone. Click 7 times on MIUI until you become a developer!
USB debugging
Settings → Additional → For Developers
ADB drivers
adb shell
dumpsys battery resetReset the device.
This method resets all the data of the battery controller, including the statistics of charging cycles. Once executed, the phone can show an inaccurate percentage of charge in the first 2-3 cycles - this is normal, the calibration will be completed automatically.
⚠️ Warning: Do not use dumpsys battery set commands... to manually change charge levels - this can cause irreversible battery damage!
Method 4: Check and replace the battery (if nothing worked)
If software methods fail, the problem is almost certainly the physical wear and tear of the battery: Lithium-ion batteries lose capacity over time, and after 2-3 years of operation, they can hold a charge of only 60-70% of their original value.
How to check the status of the battery:
| Parameter | Normal value. | Critical significance |
|---|---|---|
| Capacity (from the original) | > 80% | < 60% |
| Voltage at 100% charge | 4.35-4.45 | < 4.2 V |
| Temperature in plain | 25–35°C | > 40°C or < 5°C |
| Number of charging cycles | < 500 | > 800 |
To find out the current battery capacity:
- Install the AccuBattery app (available on Google Play).
- Charge your phone to 100% and use it normally until discharged.
- In the Health section, the application will show the real capacity in mAh.
How to update the firmware manually:
- Download the latest version of MIUI for your model from the official Xiaomi website.
- Move the firmware file (.zip format) to the root folder of the phone.
- Go to Settings → About the phone → System update.
- Click on the three dots in the upper right corner and select Select the firmware file.
- Confirm the installation and wait for the completion (the phone will restart several times).
If the problem persists after the update, try resetting through Settings → Additional → Restore and Reset. Remember, this will delete all data from the device!
💡
Before resetting or firmware, make sure to check if the bootloader is unlocked on your Xiaomi. Some models require official permission from Xiaomi (the process takes up to 7 days).
More tips: how to extend the life of Xiaomi battery
To avoid problems with auto-disconnection in the future, follow these guidelines:
- 🔌 Use the original charger – unoriginal adapters can damage the power controller.
- 🌡️ Avoid extreme temperatures: Do not leave your phone in the sun or freezer.
- 🔄 Do not drain the battery to 0% - optimal charging range: 20-80%.
- 📵 Disable unnecessary functions (GPS, NFC, Bluetooth when not in use.
- 🔋 Calibrate the battery every 3 months (see Method 2).
You should also turn off background activity for unnecessary applications.
- Go to Settings → Applications → Permissions → Autorun.
- Turn off auto-start for underutilized programs.
- In Battery → Battery Optimization, select All apps and disable optimization for instant messengers and other important services.
These measures will help to increase the operating time and prevent premature wear of the battery.