Why Xiaomi phone started to run out quickly: 12 reasons and how to return autonomy

Did you notice that Xiaomi, which last night held a charge all day, now discharges in a couple of hours? The battery melts in front of your eyes even in standby mode, and after full charging the phone shows 100%, but after 15 minutes of use it is 80%? This problem is familiar to many owners of smartphones Redmi, POCO and Mi — and it is not always associated with battery wear.

In 80 percent of cases, fast discharge is caused by software failures, background processes, or improper settings, not a dead battery. We analyzed service center data and user feedback to highlight 12 real reasons Xiaomi is starting to “eat” a charge like crazy. In this article, you will find not only diagnostics, but also step-by-step instructions for restoring autonomy — from basic actions to hidden MIUI settings, which are not even in the official documentation.

We warn you right away: if you use a Xiaomi smartphone for more than 2-3 years, the problem can be in the degradation of the battery to 60-70% of the original capacity - in this case, software methods will only give a temporary effect. But in 6 out of 10 cases, it is not the "silden" banks that are to blame, but the software. Let's figure out how to check this and what to do.

1. Checking the status of the battery: how to find out the real wear

Before digging into the settings, the most obvious reason is the physical wear of the battery: Xiaomi smartphones on a Snapdragon chip (for example, the Redmi Note 10 Pro or POCO X3 Pro) lose up to 20% of capacity in 2 years of active use, and models with Mediatek (such as the Redmi 9A) can “degrade” even faster due to less advanced power management system.

To check the status of the battery:

1. Enter the code ##4636## in the phone application.
2. Select the Battery Information item.
3. If the value is below 80%, the battery is critically worn out and needs to be replaced.

Also note the battery temperature in this menu, if it's consistently above 40°C even in normal use, it's a sign:

• 🔥 Overheating due to background processes (see section 3)
• 🔋 Battery defect (swelling, short circuit)
• ⚡ Failure of the power controller (requires repair)

If the battery is over 80 percent healthy, but the phone still runs out in a few hours, it's a software problem.

2. Hidden charge eaters: how to find and disable

MIUI is known for being gluttonous, consuming more power than naked Android, but it’s often not Xiaomi’s services themselves that are to blame, but third-party apps that run in the background even when you’re not using them, such as instant messengers (Telegram, WhatsApp), social networks (TikTok, Instagram), or games that can eat up to 30% of your charge per day.

To identify the main culprits:

1. Go to Settings → Battery and Performance → Battery Use.
2. Click on the three dots in the top right corner and select Usage Statistics.
3. See which apps have consumed the most power in the past 24 hours.

The typical monsters that Xiaomi is discharging:

• 📱 Google Play Services – if you are using it >15%, you need to drop the cache.
• 🎮 Games (Genshin Impact, PUBG Mobile – even after closing, they can remain in the background.
• 📊 Fitness apps (Mi Fit, Google Fit) – constantly monitor sensors.
• 🔍 Antiviruses (Avast, Kaspersky) scan the system in the background.

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If you see an Android System application with a consumption of >20% in the battery statistics, this is a sign of a MIUI failure. Resetting to factory settings will help (see section 7).

To limit background activity:

1. Go to Settings → Applications → Application Management.
2. Select the “glutty” application → Battery → Limit background activity.
3. For extreme cases: Settings → Battery → Power saving mode and enable Super Energy Saving (limit background processes for all applications).

3. Autostart and Notifications: Why They Kill the Battery

One of the most insidious features of MIUI is the autorun of applications, and many programs (especially Chinese ones) are given the default right to start when you turn on your phone or connect to the Internet, and as a result, they are constantly hanging in memory, updating data and eating up charge.

How to turn off autostart:

1. Go to Settings → Applications → Application Management.
2. Press the three dots at the top. → Auto-start.
3. Turn off auto-run for all unnecessary apps (especially for games, social networks and instant messengers).

Another hole is notifications, and each alert wakes up the processor, turns on the screen, and uses a charge to reduce the power consumption.

• 🔔 Disable notifications from unnecessary apps in Settings → Notifications.
• 📵 Turn on the mode Do not disturb at night (saves up to 10% charge).
• 📶 Turn off Auto-Update apps in Google Play (settings) → Network → Auto-update of applications → Never).

4. MIUI Optimization: Hidden Settings to Save Charge

MIUI has a lot of hidden features that can both improve and degrade autonomy. Many users are unaware that their Xiaomi is running in the “gluttonous” mode by default.

Pay special attention to performance mode. MIUI has three options:

• 🚀 Performance – maximum power, but also maximum battery consumption.
• ⚖️ Balanced – the best choice for most users.
• 🔋 Energy saving – limits background processes, but can slow down games.

Also check the location settings:

1. Go to Settings → Privacy → Permits → Location.
2. Disable access to geodata for applications that don’t need it (such as Galery or Calculator).
3. Enable only when in use for applications that really need geolocation (e.g. Google Maps).

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The most effective setting to save charge is to reduce the refresh rate of the screen to 60 Hz. In practice, the difference between 60 Hz and 90 Hz is almost invisible, and the battery lasts 15-20% longer.

5. Viruses and Malware: How They Steal Charge

If your Xiaomi has started to run out for no apparent reason, it may have been a mining virus or an advertizing bot.

• 🖥️ Use the processor for cryptocurrency mining (consumption of up to 50% charge per hour!).
• 📢 Show hidden ads in the background (even when the screen is off).
• 📡 Send your data to the servers of attackers.

Signs of infection:

• The phone is warming up without load.
• The battery even sits in the plane mode.
• Battery statistics show high consumption from Android System or Mediaserver.

How to check and clean your phone:

1. Install antivirus (Malwarebytes or Bitdefender) and perform a full scan.
2. Check the list of installed apps in Settings → Apps. Uninstall suspicious programs (especially with names like System Update, Clean Master or Battery Saver, if you haven’t installed them).
3. Disable the installation of applications from unknown sources: Settings → Privacy → Special permissions → Install unknown applications.

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If the antivirus doesn't find any threats, but the phone is still behaving suspiciously, try booting into Safe Mode (hold the shutdown button → long tap on "Stop" → "Safe Mode"). This mode only runs system applications. If the battery lasts longer, it's the fault of third-party software.

6. Settings reset: when it really helps

If you’ve tried all the ways, but Xiaomi still dies in a few hours, it’s probably a system failure problem.

• 📥 Updates MIUI (Especially if the update is interrupted).
• 🔄 Installation of custom firmware or root rights.
• 🗃️ Transferring data from an old phone (sometimes errors are also carried over).

Resetting to factory settings is a radical but effective method, and it will delete all the data, so first:

Make a backup copy in Mi Cloud|Save photos to your computer or Google Photos|Write down logins/passwords from accounts|Make sure you know the password from Mi-account (required after resetting)-->

Resetting instructions:

1. Go to Settings → About the phone → Reset settings.
2. Choose to erase all data.
3. Confirm the action and wait for the reboot (it will take 5-10 minutes).

⚠️ Note: If after resetting the phone requires you to enter a password from Mi-account, and you do not remember it - unlocking can take up to 72 hours (according to the rules of Xiaomi.

After discharge:

• Do not restore data from the backup immediately – check how the battery behaves on a clean system.
• Install applications one by one and monitor the charge consumption.
• Don’t update MIUI in the first few days – let the system stabilize.

7. Hardware problems: when to carry in the service

If all software methods have been tried, but Xiaomi still runs out in 2-3 hours, the problem could be hardware.

It is especially dangerous if:

• 🔥 Phone heats up to 50°C and higher (risk of fire!).
• 💥 The battery swelled (see on the raised screen or body).
• ⚡ The swelling is then interrupted).

⚠️ Warning: If the battery is swollen, you can't try to charge the phone or use it further, it can cause a fire!

The cost of replacing the battery in Xiaomi:

• 📱 Redmi Note / POCO: 1 500–2 500 ₽ (original).
• 📱 Mi 11 / Mi 12: 3 000–4 500 ₽ (controller-in-the-box).
• ⚠️ Unoriginal batteries can last less and fail faster.

8.Prevention: How to prolong the life of Xiaomi battery

To prevent your Xiaomi from starting to run out in a year or two, follow these rules:

• 🔌 Don't keep your phone charging all night, charge 80-90% and turn it off.
• ☀️ Avoid overheating (do not leave in the sun, do not play heavy games when charging).
• 🔋 Use original chargers (cheap Chinese PUs ruin the battery).
• 📵 Once a month, do a full discharge cycle (up to 0% and charging up to 100%) to calibrate the controller.
• 📲 Update. MIUI — Newer versions often optimize energy consumption.

It is also necessary to disable unnecessary functions:

• 📡 5G (If you are not using it, switch to 4G In Settings → SIM-maps and mobile networks).
• 📍 Wi-Fi scanning and Bluetooth scanning in the background (Settings) → Connections → Additionally).
• 🎤 Google or Xiao Voice Assistant AI (if you don't use).

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The most common mistake users make is using your phone while charging for games or videos, which causes the battery to overheat and degrade rapidly, charging your phone in sleep mode or at minimal load.

FAQ: Answers to Frequent Questions