Why Xiaomi Redmi 4X quickly sits down battery: a full analysis of the causes and solutions

Xiaomi Redmi 4X is still a popular budget smartphone, but many owners face one pressing problem: the battery runs out too quickly, sometimes literally "in front of your eyes." If your device has been on charge for a day and now barely lasts until the evening, it does not always mean that the battery has fallen into disrepair. 80% of the time, the fault is the settings, background processes or outdated software.

In this article, we will explore all possible causes of rapid discharge of the Redmi 4X – from banal battery wear to hidden power-consuming MIUI functions. You will learn how to diagnose the problem with built-in tools, which applications “eat” charge in the background, and what to do if the smartphone discharges even when it is turned off. And also – unique data on real wear of the Redmi 4X batteries after 5+ years of operation.

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

The average lifespan of lithium-ion batteries is 3-5 years or 500-800 charge cycles. If your Redmi 4X is released before 2018, chances are that the battery has physically degraded. Even with careful use, the capacity drops by 20-30% in 3 years, and with active use it drops by up to 50%.

Wear checks can be made in two ways:

📱 By code: type ##4636## in dialer, select Battery Information. Level indicates current charge and health indicates state (ideal - Good).
🔋 AccuBattery: shows real capacity (for example, 2800 mAh instead of the declared 4100 mAh) and percent of wear.

If the wear exceeds 40%, the battery should be changed. The original battery for the Redmi 4X (BM47 model) costs ~1,500-2000 rubles, and a replacement in the service will cost 500-1000 rubles. Don't buy cheap analogues - they often have an understated capacity and can swell.

⚠️ Warning: If the battery is swollen (the body of the smartphone has deformed), immediately turn it off and do not use it until replaced!

📊 How long have you been using Xiaomi Redmi? 4X?

Less than a year.

1-2 years

3-4 years

More than 5 years

2. Background applications: Who is stealing your charge?

MIUI is known for being gluttonous, but it's not just system processes that are to blame. Many custom applications continue to work in the background even when you're not using them.

📲 Social networks (Facebook, Instagram, VK): constantly synchronize data, even in a folded state.
🎮 Games (PUBG Mobile, Free Fire: Some run background processes for event notifications.
📍 Maps and navigators (Google Maps, Yandex.Navigator): use GPS Mobile Internet Even After Closing.
🔄 Auto-update apps (Play Market, Mi App Store): download updates in the background.

How to find and disable “gluttonous” applications:

Go to Settings → Battery and Performance → Battery Use.
Click on the three dots in the top right corner and select Application Statistics.
Sort the list by charge consumption. Applications with consumption >5% per day are candidates for optimization.

For a radical solution:

Disable Autostart in Settings → Permissions → Autostart

Ban background activity in Settings → Applications → [name] → Battery

Restricting mobile data for social networks

Use Greenify to Freeze Unnecessary Apps-->

💡

MIUI has a hidden feature called "Energy Saving Mode for Applications." Activated via Settings → Special Options → Energy Saving Mode. Limits background activity for selected programs.

3. MIUI settings that kill the battery

Xiaomi Redmi 4X runs on MIUI, a firmware with lots of useful but energy-intensive features, many of which are on by default and work invisibly. Here are the main charge eaters:

Function	Battery consumption	How to turn off
Continuous synchronization MI-account	Up to 10% a day	Settings → Accounts → Mi Account → Synchronization (disable unnecessary data)
Automatic optimization of the system	Up to 5% (background processes)	Settings → Battery → Settings → Battery Optimization (disable)
Interface animation	Up to 3% (processor load)	Settings → About Phone → MIUI version (tap 7 times to unlock Developer Settings, then turn off animation)
Search for devices via Bluetooth/Wi-Fi	Up to 7% (constant scan)	Settings → Connections → Additional → Device Search (disable)

The "Dual Applications" function is particularly insidious, and each clone consumes resources separately to turn it off.

Go to Settings → Applications → Double Apps.
Remove unnecessary copies or disable the function completely.

⚠️ Note: If you use the topics MIUI, Some of them contain animations and widgets that load the processor. → Topics.

4 Network problems: how 3G/4G and Wi-Fi drain your phone

An unstable connection is one of the main causes of rapid discharge, and when the signal is weak, the smartphone spends additional energy finding and maintaining it.

📶 Weak signal. 3G/4G: if 1–2 dividing the network, the phone is constantly trying to "catch" the connection.
🔄 Frequent change of towers: in motion (for example, in transport), the smartphone is reconnected to base stations, which eats up the charge.
📡 Wi-Fi in the subway/bus: Public networks often break the connection, forcing the phone to reconnect.

How to reduce battery consumption from the network:

Switch to the switch. 3G, if 4G Unstable: Settings → SIM-maps and mobile networks → Preferred type of network → 3G.
Turn off automatic Wi-Fi search: Settings → Wi-Fi → Additional → Network Search (select Manual).
Use In-plane mode in unconnected places (e.g., in an elevator or basement).

What to do if the phone is discharged in standby mode?

If Redmi 4X Loses 10-20% of charge per night when turned off, the power controller or problem app is to blame. SIM-map SD-card for the night - if the discharge stops, the problem is in the communication module. 2. Swipe the phone through Mi Flash (clean firmware will remove background processes). 3. Replace the battery - even in the off state, the worn-out battery can self-discharge.

5. Viruses and malware: hidden threats

If the battery starts to go down suddenly and unknown processes appear in the usage statistics (e.g., com.android.system with a consumption of 20%), your smartphone may have been infected.

🔍 Mining cryptocurrency in the background (consumption) CPU 100%).
📤 Sending. SMS to pay numbers (check the costs in the operator’s personal account).
📡 Uses your phone as a proxy server for other devices.

How to check and clean your phone:

Install Malwarebytes or Dr.Web Light and scan the system.
Check the list of installed apps in Settings → Apps. Delete suspicious ones (especially with names like System Update, Flash Player).
If the viruses are not found, but the battery is still running out, reset your phone to factory settings: Settings → Additional → Recovery and Reset.

⚠️ Warning: Some viruses block access to settings. If you can't open Settings → Battery, boot into Safe Mode (press the power button) → long tap on "Switch off» → «Reboot to Safe Mode»).

6. Hardware problems: what breaks down in the Redmi 4X

If the software methods didn't help, the problem could be the hardware.Typical hardware faults of the Redmi 4X affecting the battery:

🔌 Faulty Charging Controller: Phone doesn’t hold charge even if the battery is new.
📶 Damaged communication module: the smartphone is constantly overheating and discharged due to a short circuit in the antenna.
🔋 Oxidized battery contacts: poor contact causes voltage surges and rapid discharge.
🔥 CPU overheating: If the case is hot even without a load, it may need to replace the thermal paste.

How to diagnose a hardware problem:

Connect your phone to charge. If it's not charging or if it says "Charging interrupted," the controller is a problem.
If it gets too hot or off during the call, the communication module is faulty.
Disassemble the case (carefully!) and check if there is any battery bloating or oxidation on the contacts.

Cost of repair:

Replacement of the charging controller: ~1500-2500 rubles.
Repair of the communication module: ~2000-3500 rubles.
Cleaning contacts + replacement of thermopaste: ~ 800-1500 rubles.

💡

If the phone is discharged 100% in 2-3 hours without active use, with a 90% probability of faulty hardware.

7 Updates and firmware: how MIUI affects the battery

Xiaomi Redmi 4X has not officially received updates since 2020, but many users install custom firmware (like LineageOS or Pixel Experience) that can improve or worsen autonomy.

🔄 Unstable custom firmware: some builds are not optimized for Redmi 4X load up the processor.
📥 Official updates MIUI: latest versions of Redmi 4X (MIUI 11-12) contain power consumption bugs.
🔧 Incorrect kernel settings: Some firmware defaults include overclocking CPU, Increases battery consumption.

Firmware recommendations:

If you use the official MIUI, roll back to the stable version of MIUI 10.2.2.0 (the most optimized version for the Redmi 4X).
For custom firmware, choose Android 9-10-based builds (Android 11+ can slow down).
After firmware, make sure to wipe cache and dalvik-cache in TWRP.

Instructions for rollback to stable MIUI:

1. Download MIUI 10.2.2.0 firmware for Redmi 4X (codename santoni) from en.miui.com.


2. Go to TWRP (press Power + Volume Up).




3. Select Wipe → Advanced Wipe → Tag Dalvik, Cache, System.




4. Install the firmware via Install → select the.zip file.




5.Reboot (the first download will take 5-10 minutes).

FAQ: Frequent questions about the Redmi battery 4X

Can I use Power Bank to charge the Redmi 4X?

Yes, but avoid cheap models without overload protection. The optimal parameters for the Redmi 4X: output voltage 5V/2A, capacity from 10,000 mAh. Do not use the Power Bank with Quick Charge - this will speed up battery wear.

Why does the phone run out in the cold?

Lithium-ion batteries lose up to 30% of their capacity at temperatures below 0°C. This is normal physical. To reduce discharge: Keep your phone in your inner pocket (not in your bag!). Don't turn on resource-intensive applications (games, navigator) in the cold. Use a insulation case (e.g. neoprene).

How to “swing” a new battery after replacement?

The myth of the need to “spin” (3 full charge-discharge cycles) has long been disproved. Modern lithium-ion batteries do not require this. Enough: Charge the phone to 100% after replacement. Use it as normal, avoiding full discharge (the optimal is to keep a charge between 20% and 80%). Full discharge to 0% is harmful to the battery!

What if the phone turns off at 20 to 30% charge?

This is a sign of a battery controller miscalibration. Try: Discharge the phone before it shuts down. Charge it for at least 8 hours without interruption (use the original adapter). Reset the battery settings: Settings → Apps → All apps → three points → Reset the application settings. If it doesn't work, you need to change the battery or repair the controller.

Should I turn off mobile data at night?

Yes, if you don't use nighttime notifications. Mobile data on standby consumes ~5-7% of the charge in 8 hours. Alternative: Enable overnight energy saving mode (Settings → Battery → Power Saving Mode). Use Do Not Disturb with mobile internet shutdown (Settings → Sounds and vibrations → Do Not Disturb).