How to remove the auto-shut-off screen on Xiaomi Redmi 9C: all working methods

Why Redmi 9C is offline and how to fix it

Xiaomi Redmi screen 9C automatically fades after 30 seconds, a minute or 5 minutes without activity – this is the standard behavior of the system. MIUI, However, in some scenarios (reading long texts, viewing recipes, using the phone as a navigator or monitor) IP-And it's a little bit of a inconvenience. Fortunately, there are a few ways to turn off the auto-turn off of the screen or to make it much more time-consuming.

In this article, we’ll look at all the available methods, from basic MIUI settings to hidden developer mode features and third-party apps. It’s important to understand that completely turning off screen timeouts can reduce battery life by 15-30% (based on tests on the Redmi 9C with a battery of 5000 mAh).

Before you start settings, check the MIUI version on your device: go to Settings → About Phone → MIUI version. The instructions in this article are relevant for MIUI 12-14 versions (including global and Chinese builds). If you have older firmware, update the system first.

Reading books/articles|I'm using it as a navigator.|Watching videos/streams|Other-->

Method 1: Increase screen waiting time in standard settings

The easiest way is to change the screen timeout through the settings menu, which will not turn off auto-switching completely, but will increase the interval to 10 or 30 minutes (maximum depends on the version of MIUI).

How to do this:

1. Open Settings (the gear icon on the main screen).
2. Go to the Screen section (or Display in some versions).
3. Click on Sleep Mode (or Time Out of the Screen).
4. Choose the maximum value available – usually 10 minutes or 30 minutes.

Note that on some Redmi 9C firmware (especially Chinese ones), the maximum value may be limited to 5 minutes.

Make sure the screen is always on (AMOLED) mode is on - not relevant for Redmi 9C (IPS) | Check brightness - at low brightness the screen can go out faster | Turn off Adaptive Brightness in the display settings | Make sure there are no active power saving modes-->

Method 2: Using Developer Mode to Turn Off Timeout

If standard settings are not enough, you can activate the developer mode and manually disable the time limit, which works on all versions of MIUI, but requires pre-configuration.

Steps to activate the developer mode:

1. Go to Settings. → The phone.
2. Find the MIUI version and click on it 7 times in a row (you will be notified "You became a developer!").
3. Return to the main Settings menu, and a new section for developers will appear.

Now turn off the auto-turn off screen:

1. Open the Settings. → For developers.
2. Scroll down and find the item Do not turn off the screen (or Stay awake in English).
3. Activate the switch. Now the screen will not go out when you connect to the charger.

⚠️ Note: Do not turn off the screen only works when charging. If you want the screen to stay on and on the battery, go to Method 3 or 4.

Method 3: Applications for Forced Screen Keeping On

If the system settings don't work, you can use third-party apps that mimic user activity or block the phone from going to sleep. Below are the proven utilities that run on the Redmi 9C:

• 📱 Keep Screen On is a simple utility with a widget for quickly turning on / off the function.
• 🔄 Caffeine – Adds a button to the notification panel to temporarily turn off timeout.
• ⚡ Stay Alive – advanced settings, including work in the background and exceptions for individual applications.
• 🛠️ Tasker (for advanced users) – allows you to create an automatic rule to hold the screen in certain conditions (for example, when you start the navigator).

How to set up Keep Screen On:

1. Download the app from Google Play.
2. Open it and grant permission to Overlay over other windows (necessary for work).
3. Activate the Keep Screen On switch.
4. Add the app widget to the main screen for quick control.

The advantage of this method is flexibility: you can only enable screen retention when necessary, without consuming battery power all the time. However, some applications (for example, Stay Alive) may conflict with MIUI Optimizations, which will lead to their forced closure, in which case disable optimization for the utility in the battery settings.

1. Go to Settings → Applications → Application Management.

2. Find the desired application and open its settings.

3. Enable permissions: Overlay, AutoRun, Background work.

4. Add the app to the list of energy saving exceptions.-->

Method 4: Disabling energy saving for specific applications

MIUI aggressively optimizes background processes, which can lead to premature shutdown of the screen in some applications (for example, in navigators or messengers). To avoid this, you can manually turn off the energy saving for the desired programs.

Instructions:

1. Open Settings → Battery and Performance.
2. Go to Battery Consumption Management applications.
3. Select the application you want to disable the restrictions for (such as Google Maps or YouTube).
4. Set up a No Limits mode.
5. Go back and add the app to the Power Saving Exclusions.

This method does not cancel the global screen timeout, but prevents it from prematurely turning off due to background optimization. For example, if you use the Redmi 9C as a navigator, Google Maps will keep the screen on for longer than the standard 5-10 minutes.

⚠️ Warning: Power saving outage for too many apps could cause Redmi to overheat 9C We recommend that you use this method selectively, only for mission-critical programs.

Method 5: Use ADB-commands for deep tuning (without root)

For advanced users, there is a way to turn off the auto-turning of the screen via ADB (Android Debug Bridge), which does not require root rights, but requires connecting the phone to a computer. The method works on all versions of MIUI and allows you to set unlimited screen life even on the battery.

What you need:

• 💻 Computer with installed Xiaomi and ADB-tools drivers.
• 📱 Developer Mode Included and Debugging by USB on the Redmi 9C.
• 🔌 Cable USB (preferably original).

Step-by-step:

1. Connect the phone to the computer and allow debugging over USB (a request will appear on the smartphone screen).
2. Open the command prompt (or PowerShell) in the adb.exe folder.
3. Enter the command to check the connection: Adb devices must appear serial number of your device.
4. Execute the command to turn off screen timeout: adb shell settings put global stay_on_while_plugged_in 3 where 3 It means "always on (both on the battery and when charging)".
5. Reboot the phone.

To return the standard settings, run the command:

adb shell settings put global stay_on_while_plugged_in 0

💡

ADB-Teams can circumvent limitations MIUI, But you need to be careful. Improper use can cause system failures. Always check the commands before you run them!

Additional tips for saving charge when disconnected timeout

If you decide to keep the Redmi 9C screen on for a long time, consider a few recommendations to minimize battery consumption:

• 🔋 Reduce the brightness of the screen to a comfortable minimum (manually or through Adaptive Brightness).
• 🌙 Turn on the dark theme on Redmi. 9C (s IPS-screen) this reduces consumption by 5-10%.
• 📶 Turn off mobile data or Wi-Fi if you don’t need it – background network activity is severely draining the battery.
• 🔕 Turn on Airplane Mode if your phone is only used to read or view offline content.
• 🔄 Use automatic rules (via Tasker or MacroDroid) to ensure that the screen is turned on only at the right time.

Also, pay attention to the temperature of the device. Prolonged screen operation at maximum brightness can lead to heating, especially if you run resource-intensive applications (games, video players). If the phone gets hot, take a break for 10-15 minutes.

FAQ: Frequent questions about auto-turn off screen on Redmi 9C