Xiaomi Redmi is discharged in half a day: how to find and fix the cause

Have you noticed that your Xiaomi Redmi is running out too fast? 3-5 The problem is familiar to many owners of smartphones series Redmi - from the budget Redmi 9A to the flagship Redmi Note 12 Pro+. The reasons can lie in both software failures and in the physical wear of the battery.

In this article, we'll look at 10 of the main causes of fast discharge and give you specific instructions on how to fix them, how to check battery status, what settings to optimize, and when to bring your phone to service. MIUI 12 and later – owners of older versions will have to find alternative solutions.

So let's start with the obvious, diagnostics, and without it, anything you do is like shooting a gun at a sparrow, and make a rule: before you change your settings, check the battery consumption statistics in the Settings menu. → Battery, it'll save you hours of time.

1. Battery wear: how to check and what to do

Any lithium-ion battery degrades over time. - Xiaomi Redmi has average battery life — 300-500 full charge cycles (about) 2-3 After that, the capacity starts to fall, and the phone discharges faster even when it's in standby mode.

To check the wear:

1. Install the AccuBattery app (free on Google Play).
2. Charge the phone before 100% and use it until it is completely discharged (1-2 cycle).
3. Check out the Battery Health section – if the capacity is below 80% of the factory capacity, it’s time to change the battery.

Symptoms of critical wear:

• 🔋 The phone's running out. 20-30% one hour in standby
• 🔌 The charge is jerky (fast, then slow)
• 🌡️ The body gets very hot when charging.
• ⚡ The battery suddenly shuts down on 10-15% charge

⚠️ Note: If the battery capacity has fallen below 70%, Lithium-ion batteries with severe wear and tear can swell and damage the motherboard. Xiaomi service centers change the original battery for a new battery. 1-2 hour.

2. Application background activity: Who is stealing your charge?

MIUI It's a very popular thing, because it's a lover of the background, and many of the apps that are still running even after they're closed, and they're consuming charge and Internet traffic:

• 📱 Messengers (WhatsApp, Telegram, Viber)
• 🎮 Games with online communities (PUBG Mobile, Genshin Impact)
• 📊 Social networks (TikTok, Instagram, Facebook)
• 📍 Maps and Navigators (Google Maps, Yandex.Maps)

How to limit background activity:

1. Go to Settings → Applications → Application Management
2. Select a problem application → Battery consumption → Limit background activity
3. For radical savings, turn on Settings → Battery → Power saving mode (limits the background work of all applications)

For advanced users: in the developer MIUI (Settings → The phone. → Version. MIUI — Tap 7 times) there is an option to Do not remain active. Turn it on for unnecessary applications.

3. Autobrightness and AOD: power-eating

The screen is the main consumer of power in a smartphone. Even small settings here have a huge effect. For example, the automatic brightness in Xiaomi Redmi often works incorrectly: instead of saving, it keeps brightness at its maximum when it is not necessary.

What to check:

• 🌞 Turn off autobrightness in Settings → Display. → Automatic brightness
• 🌑 Set the manual brightness on 40-50% (It is the best balance between visibility and economy)
• 🕒 Turn it off. AOD (Always on Display in Settings → Lock screen – it eats up to 5% charge per hour!
• 🔄 Reduce screen waiting time to 15-30 Seconds in Settings → Display. → Sleep after

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If you need it. AOD For notifications, only enable it on 2-3 hourly daily through the settings → Lock screen → Schedule AOD.

4. Failures MIUI and system errors

Operating system MIUI It's not perfect, it's got bugs that cause you to burn more, and it's more likely to get problems after you upgrade or install custom firmware:

• 📉 The battery sits on 1-2% standby
• 🔄 The phone spontaneously reboots.
• 📊 Battery consumption statistics show a strange process of the Android System or MIUI Daemon with 30 consumption%+

How to fix it:

1. Reset the system cache: 1. Turn off the phone 2. Press the power button + Volume up 3. From the Recovery menu, select Wipe Cache Partition 4. Reboot the device
2. Retracement to the previous version MIUI (if the problem has occurred after the update: 1. Download the old firmware from miuirom.org 2. Go to Settings → The phone. → System Update 3. Press three dots → Select firmware file 4. Install the downloaded file
3. Reset to factory settings (last resort, do backup!)

⚠️ Warning: If the phone starts to drain even faster after the cache is reset, this is a sign of damage to system files, in which case only a complete flashing through Fastboot or a visit to the service will help.

5. Bad Network Signal: How to 4G/5G battery-kill

When your Redmi picks up a weak signal from the cellular network or constantly switches between 4G and 5G, The communications module is running at power limit. 20-30% Charge per hour, especially for models with support 5G (Redmi Note 11 Pro+ 5G, Redmi K50 newer).

How to check and correct:

1. Look at the network indicator in the top bar. If it's flashing or flashing all the time. 1-2 dividing-- weak signal.
2. Go to Settings. → SIM-maps and mobile networks → Type of network and try to manually select only 4G (if 5G-model).
3. Turn on Traffic Saving mode in the same settings – this will limit background data transfer.
4. If you are in a low coverage area, turn on the plane mode for the night or use Wi-Fi for calls (VoWiFi).

For owners of Redmi with two SIM-If one of the cards is not in use, turn it off in the settings. SIM-The card consumes energy to scan the network.

6. Viruses and malware

Yes, Android viruses exist, and they can cause a quick discharge, especially if you install apps from third-party sources (not Google Play).

• 🎮 Cheats for games
• 💰 Applications for “earning money"
• 📺 Modified versions of popular programs (e.g. YouTube Vanced, Spotify Premium)
• 🔧 "Battery Optimizers and Phone Accelerators"

How to check your phone for viruses:

1. Install Malwarebytes or Dr.Web Light from Google Play.
2. Run a full scan (may take 10-20 minutes).
3. Check the list of installed applications in Settings → Apps. Remove suspicious programs.
4. Disable installation from unknown sources in Settings → Confidentiality.

If a virus is detected that is not removed:

1. Go to Safe Mode (click the off button). → "Safe regime").
2. Remove the malware manually.
3. If it doesn’t help, make a reset to the factory settings.

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Never install. APK-Even if the app promises "free Netflix" or "unlimited money in the game," it's 99% fraud.

7. Non-original chargers and cables

Using cheap Chinese charging and cables not only slows charging, but can also damage the battery. Xiaomi Redmi uses Quick Charge technology, which requires quality accessories.

Signs of poor charging:

• ⚡ The phone charges for more than 2 hours
• 🔥 The charger or cable is very hot.
• 📉 The level of charge "jumps" (80 %, then 60%)
• 🔌 Charging is interrupted at the slightest movement of the cable

What to do:

• 🔌 Use only original chargers from Xiaomi or certified analogues (e.g. from Anker, Baseus).
• 🔄 For models with Quick Charge 3.0/4.0 (Redmi Note 10 Pro, Redmi K40) minimum charging power must be 18W.
• 🔋 Check the charging port for debris – often the problem is in the accumulated dust.
• 📦 If the phone is new, check the configuration: there must be a cable in the box. USB Type-C (for modern models).

⚠️ Note: Use of chargers with a power above the recommended (e.g, 67W Redmi Note 11, which only supports 33W) It can cause the battery to overheat and bloat. Always check compatibility!

8.Overheating: Why the phone gets hot

High temperature is the main enemy of lithium-ion batteries.If your Xiaomi Redmi heats up above 40°C, this leads to:

• 🔥 Accelerated battery wear (loss) 10-15% month-long)
• ⚡ Increased energy consumption (cooling takes an additional charge)
• 📉 Unintentional shutdowns under high load

The main causes of overheating:

How to prevent overheating:

• 🧊 Use cooling pads for games (especially for Redmi K-series with Snapdragon processors) 8xx).
• ☀️ Do not leave your phone in direct sunlight (even when it is off!).
• 🔄 Clean the charging port and vents (if any) of dust regularly.
• 📴 Turn it off. 5G, If you don't use it, this module will warm up more. 4G.

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If the phone is hotter than 50°C and spontaneously shuts down, this is a sign of critical battery wear or processor malfunction!

FAQ: Frequent questions about Xiaomi Redmi discharge