Modern Xiaomi and Redmi smartphones are equipped with capacious batteries, but aggressive optimization of the MIUI or HyperOS system often leads to unexpected discharges or, conversely, to blocking the operation of applications in the background. Energy saving in the devices of this brand works on its own algorithms that are significantly different from pure Android.
Many owners are faced with a situation where messengers do not send notifications, and the navigator turns off when the screen is turned off. This is not a bug, but a feature of the MIUI Optimizer and the task manager. The system seeks to maintain charge at all costs, closing processes that it considers inactive. In this article, we will discuss in detail how this system works, what power modes exist and how to properly configure them to your needs without turning the flagship into a button phone.
Understanding the power controller and software limiters will allow you to significantly increase your device life. The AI Battery Manager algorithm automatically learns your usage habits, but its predictions often require manual adjustments to keep background services running. Next, we’ll look at all the available energy management tools.
Basic diets and their impact on the system
Energy management is based on cross-profile switching, and standard mode tries to balance performance and consumption, but it is often too conservative for active users, and when switching to Energy Saving mode, the system forcibly reduces the clock speed of the processor and limits background activity.
There is also a No Limits mode (or Performance) that is not available on all models, but is extremely important for gamers, in which many heat and energy limits are turned off, allowing you to squeeze a maximum of FPS, but the battery can sit down in 3-4 hours of active screen.
To activate or change your profile, go to Settings → Battery. Here you will see a slider or mode select buttons. Some models allow you to set up automatic saving when you reach a certain percentage of charge, for example, 20% or 10%.
- 🔋 Standard mode: optimal balance for daily use, limits only the most energy-intensive processes.
- 🐢 Saving mode: reduces brightness, turns off vibration, limits background traffic and synchronization.
- 🚀 Performance mode: keeps high frequencies CPU/GPU, Turns off the trottling, discharges the battery as quickly as possible.
It's worth noting that newer versions of firmware may have different interfaces, so if you don't find the switch, try pinching the battery icon on your desktop or searching for settings by typing "mode."
Background Process Management and Application Limitations
The most common cause of notification problems is aggressive application “sedation.” MIUI defaults to “No Limits” for system services only, and user applications often restricts. To change this, you need to go to Settings → Applications → All Applications.
Select the app you want (like Telegram or WhatsApp) and find Energy Saving, where three key options are available. Unlimited allows the app to work fully in the background, consuming energy as needed, Saving energy mode limits background activity, and Hard Limit completely prohibits operation when the screen is off.
☑️ Setup of mission-critical applications
⚠️ Warning: Setting the No Limits mode for dozens of applications will result in a quick battery drain. Apply this setting only to instant messengers, email clients and navigators.
There's also a global autostart setup. Many applications can't work properly unless they're allowed to autorun. Go to the Safety app → Permissions → Autostart. You need to manually turn on the switches for those programs that are supposed to run with the system.
Don’t forget the Advanced Cleanup feature. In some versions of MIUI, it can force applications to close even if they have exemptions. Check the settings in the Security menu → Settings → Advanced Cleanup and make sure important apps are added to exceptions.
Screen and display: setting up the visual part
The display is the main consumer of power in any smartphone. Xiaomi has a few specific settings that affect autonomy. First of all, it is about the refresh rate of the screen. If your device supports 90 Hz, 120 Hz or even 144 Hz, using the Maximum mode will consume significantly more charge than Standard (60 Hz).
The best solution is to choose the default mode (or "Automatically"), in which case the system itself increases the hertz only in supported applications (scrolling tape, games), and with a static image (reading text, viewing photos) reduces it to 60 Hz, which saves up to 15-20% of energy in screen scenarios.
The influence of the dark topic on OLED-screen
Brightness and screen timeout also play a role. Xiaomi's Adaptive Brightness feature works quite well using a light sensor. However, if you're in a room with even light, it's best to manually set the brightness at a comfortable level (about 40-50%) so that the system doesn't try to constantly adjust the backlight.
- 🌑 Dark topic: really saves charge only on the AMOLED-Matrices, turning off black pixels.
- ⏳ Time Out: setting the time to sleep screen on 15-30 Seconds will prevent the display from running in vain.
- 🖼️ Live wallpaper: their use can increase battery consumption 5-10% day by day due to the constant drawing of the schedule.
The Always On Display feature deserves special attention. Although it looks spectacular, showing time and notifications on a switched-off screen, it consumes energy constantly. If your goal is maximum savings, this feature is better to turn off or adjust the schedule (for example, only during the day).
Network modules and geolocation
Network search is one of the most energy-intensive processes. If you are in the area of insecure reception (basement, country house), the modem of the smartphone starts working at the power limit, constantly scanning the air. In such situations, it is recommended to temporarily turn on Flight Mode if calls are not needed, or forcefully switch to 3G/2G, since finding a stable 4G/5G signal “eats” the battery is the fastest.
Settings 5G If you don't have fifth-generation coverage in your area, and you have "Preferred" settings. 5G", The phone will be constantly scanning for the airwaves, even if there's no tower. → SIM-maps and mobile networks → Preferred type of network → Prefer LTE.
| Communication module | Impact on the battery | Recommendation |
|---|---|---|
| GPS/GLONASS | High (with active navigation) | Disable when not in use; use Network Only mode for applications |
| Bluetooth | Average (depending on devices) | Turn off if you don’t wear a watch/earphone; use BLE |
| NFC | Low (on standby) | You can keep it on, but turn it off when it is long-term downtime. |
| Wi-Fi scanning | Middle (background) | Disable in geolocation settings "Search for Wi-Fi networks" |
Geolocation on Xiaomi has its nuances. → Confidentiality → Access management → Location access can be customized in detail. Many applications (weather, news aggregators) only have "Usage Only" access. Permanent background access is unnecessary for these programs and only consumes resources. GPS-module.
💡
Turn off the "Improving Geolocation Accuracy" feature in location settings unless you need perfect accuracy to the meter. GPS-satellite and Wi-Fi networks.
Synchronization, notifications and system services
Background synchronization of Google and Mi Account accounts is a constant exchange of data. If you have many accounts or applications that constantly sync data (for example, cloud galleries, notes), this creates a constant load on the radio module. You can check the settings in the Settings → Accounts and Sync menu.
You can turn off autosynchronization for specific services that you don't need in real time, for example, synchronizing contacts or calendars can be manually switched if you don't change them constantly from other devices, which will significantly reduce the number of network calls.
⚠️ Note: Disabling Google Photos or Mi Cloud sync may result in loss of photos when your phone breaks. Use this measure only if you have an alternative backup method or are prepared to take risks.
It’s also worth checking notification settings. Each incoming notification wakes up the screen (unless configured otherwise) and vibrates. In the Settings → Notifications and Control Center menu, you can turn off pop-up notifications for gaming or news apps, leaving only important ones.
System services such as Device Search or MIUI Notifications (advertising) also consume resources. Disabling advertising identifiers and personalized recommendations in Password and Security → Access to personal data (or Special Features) will not only increase privacy, but also slightly reduce background activity of network requests.
💡
A comprehensive shutdown of unnecessary background services and synchronization can extend battery life in standby mode from 5-7% per day to 2-3%.
Additional tools and hidden settings
For advanced users, Xiaomi offers an engineering menu and special codes to access hidden battery tests. However, the most useful tool is the built-in flow analyzer. In the application "Safety" → "Battery" → "Statistics" you can see a detailed graph of the discharge by the clock.
If you see a sudden jump in discharge (for example, 5% in 10 minutes in your pocket), it is a signal of “wakelock”, a process that keeps the phone awake. Often the culprits are frozen apps or errors in the work of Google Play Services, in which case it helps to clean the cache of the problematic application or completely reinstall it.
There's also the Ultra Battery Saver feature, which turns the smartphone interface into a big icon, leaving only calls, SMS and selected apps available, and it's a survival mode that allows you to last 5-10 hours to charge even at 5% charge, but it's almost impossible to use the Internet in it.
- 🛠 Resetting statistics: sometimes helps to reset the statistics of battery usage in the developer menu (requires activation after 7 clicks on the build number).
- 🔄 Update: new versions MIUI often contain power optimization patches, keep an eye out for system updates.
- 🌡 Temperature: Avoid using navigation or heavy games while charging, overheating accelerates the chemical degradation of the Li-Ion element.
Physical factors are also important: the use of non-original chargers with poor current stabilization can lead to the fact that the power controller will work inefficiently, spending some of the energy on heat.