Disconnect Xiaomi at night: harm, benefits and correct settings

The question of whether to completely turn off the smartphone before bed has been a fierce debate among owners of Xiaomi and Redmi for many years. Some users believe that the gadget should take a break from electricity as well as its owner, while others prefer to keep the device in 24/7 mode. Owners of modern devices often forget that their device is a complex computer, whose work has its own nuances.

Modern operating systems like MIUI or HyperOS are optimized to run for long periods without rebooting. However, you shouldn't ignore the reboot completely either, as this can lead to a buildup of system debris. Let's look at what happens under the hood of your device when you press the shutdown button.

There is a common misconception that frequent shutdowns extend battery life. In fact, the lithium-polymer batteries used in Xiaomi smartphones have a certain resource of charge-discharge cycles, but not on-off cycles.

Myths about turning off your smartphone at night

There is a persistent myth that a phone should rest at night, supposedly reducing CPU wear and preventing overheating. In reality, modern Snapdragon or MediaTek chipsets can effectively manage power consumption, going into deep sleep when the screen is off.

Another popular fear is radiation, where users are afraid to leave the communication module on next to the bed. Although the radiation level in standby mode is minimal, the physical location of the device (not under the pillow) is more important than the fact that it is turned off.

⚠️ Warning: Turning your device off completely every night can cause you to miss important system security updates, which are often installed at night in the background.

And remember the memory myth, because many people think that turning off memory cleanses RAM better than the system does, and Android manages resource allocation by unloading inactive processes as needed.

Power saving modes against total shutdown

Instead of drastic measures to completely shut down, Xiaomi engineers have implemented flexible power management tools, and using Flight mode or specialized sleep profiles is often a more effective solution.

Flight mode shuts down all wireless interfaces: cellular, Wi-Fi, and Bluetooth. This significantly reduces power consumption, since the phone does not need to constantly search for a base station or maintain a connection to the router, and the application background processes can continue to work if they do not require a network.

On the other hand, the "Silent Mode" or "Do Not Disturb" feature allows you to keep your Internet connection, which is critical for those who are waiting for emergency calls or using their smartphone as an alarm clock, and the system decides which notifications to miss and which to show.

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Use Do Not Disturb mode with the "Repeat Call" setting to skip calls from loved ones in case of an emergency, even if the phone is silent.

Automatic on and off schedule

If you're a regular reboot supporter, you don't have to poke every night, but the MIUI has a smart feature for automating that process, which allows you to set the exact time when your phone will fall asleep and wake up.

To set up, go to the Settings menu, find the Battery and Performance section (or just the Battery in the new versions), and select the Battery item in the top menu and scroll down to the Scheduled On/Off option.

By activating the switch, you can set the time to turn off and on, for example, you can set the turn off at 23:30 and turn on at 07:00. This is the perfect trade-off: the phone reboots while you sleep, and by the time you wake up, it is ready to go.

Check this time in advance so you won’t be late for work.

The impact of the reboot on the Android system

Periodic reboots are good for the operating system, and applications can incorrectly release memory, creating what are called "leaks," and the accumulation of these errors over time leads to slowdowns in the interface.

But doing it every night is redundant, and the optimal frequency for a forced reboot is once every 3-5 days, enough to reset the cache and update system services without harming the device.

System services such as Google Play Services or Mi Cloud services are more stable with long uptime (continuous time), and frequent reboots can disrupt data synchronization, causing the phone to re-download large amounts of information.

Should I take it out? SIM-map?

Often, the question of turning off the phone is related to the desire to protect yourself from radiation or hacking through the network of the mobile operator. SIM-A card for the night is a radical measure that deprives you of connection completely.

A more sensible approach is to configure the network settings. → SIM-And you can turn off mobile data transmissions, you can only use voice, and that will dramatically reduce the radio activity of the module.

If you live in a hot spot, the phone will be constantly searching for the network, which really heats the device up and puts the battery down, so it's better to turn on Flight Mode than turn off the phone completely.

Optimization of night battery charging

Many users leave their phone on charge overnight, which creates a risk of overcharging, although modern controllers are able to stop current when they reach 100%, but keeping the battery at maximum is harmful to lithium chemistry.

The new MIUI features Optimized Charging, a smartphone that learns your habits and, if you normally sleep 8 hours, it will charge the battery to 80%, stop, and pick up the remaining 20% just before you wake up.

To activate this feature, go to Settings → Battery → Battery Protection and turn on the appropriate switch. This will extend the battery life much more effectively than nightly power off.

⚠️ Warning: Using non-original high-power chargers at night can cause you to overheat.Always use Xiaomi certified cables and power supplies.

Frequent questions and answers

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The golden mean is to use a scheduled shutdown 1-2 times a week to reboot the system, and the rest of the nights rely on sleep and optimized charging.