The sleep mode on Xiaomi devices is not just a feature to save battery power, but a set of settings that affect performance, notifications and even health. Many owners of Redmi, POCO or Mi smartphones face the fact that the phone discharges overnight, despite activated sleep. Others complain of missed notifications or sudden screen awakenings. In this article, we will discuss how to properly adjust sleep mode on different Xiaomi devices, including smartphones and smart watches, to balance energy savings and functionality.
It’s important to understand that the sleep settings depend on the MIUI version (or HyperOS for new models) and device type. For example, on the Xiaomi 13 Pro with HyperOS 1.0, the power management algorithms are different from those used on the Redmi Note 10 with MIUI 14. We’ll look at universal methods, as well as nuances for specific models. If you use the Mi Band 8 or Xiaomi Watch S3 smartwatch, there are separate recommendations for them too – read the relevant section.
What is Xiaomi’s sleep mode and why is it necessary?
Sleep Mode is a special power saving mode that is activated at a given time (usually at night) and limits the background activity of applications, data synchronization, and reduces processor performance.
- 🔋 Battery savings: Reducing energy consumption by 15-30% by limiting unnecessary processes.
- 🛡️ Protecting against digital overwork – reducing screen brightness and blocking notifications to improve sleep.
- 📵 Minimizing radio interference – turning off background scanning Wi-Fi/Bluetooth (smartwatch).
- ⚡ Extending battery life – reducing deep discharge cycles at night.
On Xiaomi smartphones, sleep is integrated into the battery and performance system, and on smartwatches, it is often called Sleep Assistant or Night Mode. It is important not to confuse it with power saving mode, which operates around the clock and has other limitations.
According to Xiaomi, adjusting your sleep patterns correctly can increase battery life by 8 to 12 hours when you’re using it during the day, but many users turn it off because of missed calls or late synchronization of messengers.
How to turn on sleep mode on Xiaomi smartphones (MIUI/HyperOS)
Activating sleep mode on Xiaomi smartphones takes less than a minute, but requires attention to detail.The instruction is suitable for most models, including the Redmi Note 12, POCO X5, Xiaomi 14 and others with MIUI 12-14 or HyperOS.
- Open Settings → Battery and Performance.
- Select Sleep Mode (or Night Mode in some firmware).
- Activate the switch to Turn on sleep mode.
- Set the start and end of sleep (recommended from 23:00 to 7:00).
- In the Exclusions section, add critical apps (e.g. WhatsApp, Telegram, Alarm clock).
On HyperOS, the path may be slightly different: Settings → Display → Night Mode → Sleep Schedule. If you don’t have a sleep mode, update your firmware or check the device model – on some budget smartphones (such as the Redmi A2), this feature is simplified.
☑️ Check before activating sleep mode
After activating the sleep mode, you will notice the following changes:
- 📱 The screen will go out faster if you do not act (timeout will decrease to 15 seconds).
- 🔄 Background data synchronization will be suspended for most applications.
- 📶 Mobile Internet will go into a mode of reduced consumption (EDGE instead 4G/5G).
- 🎵 The notification sounds will be quieter and the vibration will be shorter.
💡
If notifications from messengers stop coming after the sleep mode is turned on, add them to the exceptions manually. To do this, select the Exceptions for notifications in the sleep mode settings and select the desired applications.
Setting up sleep mode on Xiaomi smart watches (Mi Band, Watch)
On Xiaomi smartwatches, sleep mode works differently than on smartphones, where it is responsible not only for saving battery life, but also for monitoring sleep quality. For example, on the Mi Band 8 or Xiaomi Watch S3, sleep mode automatically activates sensors to track sleep phases (light, deep, REM) if you go to bed at a given time.
To adjust the sleep mode on a smart watch:
- Open the Mi Fitness app (or Zepp Life for new models).
- Select your device → Profile → Sleep mode.
- Set a time to go to bed and wake up (coinciding with your schedule).
- Activate the automatic sleep tracking option.
- Turn on Do Not Disturb so that the clock does not vibrate from notifications at night.
On the Xiaomi Watch 2 Pro and other models with Wear OS, the path may be different: Settings on the watch → System → Sleep Mode. Note that on the watch, sleep mode does not turn off the screen light when you raise your hand – this is done separately in the display settings.
| Model clock | Max. Battery savings. | Sleep tracking | Support for "Do Not Disturb" |
|---|---|---|---|
| Mi Band 7/8 | 20% | Yeah (sleep phases) | Yes. |
| Xiaomi Watch S2 | 15% | Yeah (with OS) | Yes. |
| Xiaomi Watch 2 Pro | 10% | Yes (via Wear OS) | Yes. |
| Redmi Watch 3 | 25% | Yeah (basic) | No. |
If you use a wake-up clock, make sure the alarm is set locally on the device, not through sync with your smartphone.Otherwise, in deep sleep, the watch may not receive a signal from the phone.
Application exceptions: how to avoid missed notifications
One of the main problems with sleep is missed notifications from messengers, mail or work applications. By default, Xiaomi blocks background activity of most programs, but you can set exceptions.
Ways to add an appendix to the exceptions:
- Through sleep settings: Go to Settings → Battery → Sleep Mode → Exceptions. Select apps that should work at night (e.g. Viber, Gmail).
- Through the battery settings for a specific application: Open Settings → Applications → Application Management. Select the desired application → Battery → No restrictions.
self-start
- Go to Settings → Applications → Autorun.
- Enable auto-run for critical applications.
💡
If your sleep mode stopped working after the MIUI/HyperOS update, check if your application exception settings have reset, and often after the update, the system resets the background activity permissions.
Additional settings for maximum battery savings
Sleeping isn't the only way to save energy at night, but here are some additional settings that will enhance the effect:
- 🌙 Dark theme: Activate it for sleep through Settings → Display. → Dark subject. → Scheduled.
- 📶 Airplane Mode: If you don't need calls at night, turn it on manually or on schedule (via Settings) → SIM-maps and mobile networks → Scheduled flight mode).
- 🔋 Charging Limit: Set the charge limit to 80% at night via Settings → Battery → Charging settings → Charge Limitation (not available on all models).
- 🔕 Turn off the sound: Use the Do Not Disturb mode with the schedule (Settings) → Sounds and vibrations → Don't disturb).