Why Xiaomi Redmi 4 is fast discharge and how to fix it: a step-by-step guide

Xiaomi Redmi 4 is one of the most popular budget smartphones, but even it is not immune to battery problems. If your device discharges in a few hours, warms up while charging or suddenly turns off at 20-30% charge, this is a signal of malfunction. 80% of the time it is not the battery itself that is to blame, but software errors, background processes or improper settings.

We analyzed the feedback from owners, the specifications of Redmi 4 (models with a Snapdragon 430/435 processor and a battery of 4100 mAh) and identified 10 working ways to return autonomy. In this article, only proven methods, without general tips like “reduce brightness”, you will learn how to diagnose the problem, what settings affect the charge consumption, and when it is time to change the battery.

1. Diagnosis: how to understand what exactly eats the charge

Before you fix anything, you need to identify the culprit. Redmi 4 has built-in battery monitoring tools, but they're hidden in the back of the menu.

• 📊 Go to Settings. → Battery and productivity → Battery usage. This is the app that's been using up a lot of power over the last few years. 24 Pay attention to the percentage of consumption in standby mode (screen is off) if it exceeds 10-15% — There are background processes in the system.
• 🔍 Check the Details section (check the chart). Look for anomalies: sharp spikes in flow, constant activity of the Android System or Mediaserver (this is a sign of viruses or errors). MIUI).
• 📉 Install the AccuBattery app (free on Google Play) and it will show the actual battery capacity (if it is lower than the battery capacity). 70% from the factory - it's time to change the battery) and the discharge current in mA. Norm for Redmi 4 standby: 50-100 ma.

Compare your performance with the norm:

⚠️ Note: If you see a com.qualcomm.qti process with a consumption of more than 5% in Battery Use, this is a Snapdragon processor driver error.Solution: Update the firmware or reset to factory settings.

2. Programmatic causes: viruses, MIUI errors and background processes

Xiaomi Redmi 4 runs on MIUI, a proprietary shell that is known for its appetite for resources.

• 🦠 Viruses and adware: Apps like com.android.system or com.uc.browser may disguise themselves as system-based, but they actually steal data and consume charge.
• 🔄 Auto-updates MIUI. The system can download updates in the background even if you have disabled this option. → The phone. → Update the system and click on three dots → Update settings → Turn off Automatic Booting.
• 📱 Redmi 4 often runs both Google Play Services and Mi Push Service, which are in conflict. → Annexes → Application management → System applications → Mi Push.

Another common problem is that the battery is not optimized properly for individual applications, and MIUI automatically restricts background activity, but sometimes strangles the right programs (e.g. messengers) to fix:

1. Open Settings → Battery and Performance → Battery Optimization
2. Select All apps and find those that don’t receive notifications (like WhatsApp or Telegram).
3. Tap on the app. → Choose Without Limitations.

3. Battery calibration: when the phone shows the wrong percentage of charge

If Redmi 4 suddenly turns off at 20-30% or after charging shows 100%, and after 5 minutes falls to 80% - the problem is in the desynchronization of the battery controller. This is treated by calibration, but not the usual way (discharge to 0% and charge to 100%), but through the engineering menu.

Instructions for Redmi 4 (MIUI 9-12 firmware):

1. Charge your phone to 100% and don’t turn off charging for another 1 hour.
2. Turn off charging and go to the engineering menu: ##4636## Select Battery Information and check Charge Level - it should show 100.
3. Discharge your phone until it is automatically turned off (don’t manually turn it off!).
4. Connect to the original charger and charge for at least 8 hours without interruptions.
5. Repeat the check through the engineering menu, and if the charge level is now the real one, the calibration has been successful.

⚠️ Note: Do not use "quick" calibration methods through applications like Battery Calibration. batterystats.bin, But it doesn't affect the battery controller. 4 It is useless and can aggravate the problem.

Use the original charger (5V/2A)|Disable all background applications|Charge to 100% and hold on 1 hour|Discharge until completely disconnected (do not manually switch off)-->

Hardware problems: when the battery or charging port is to blame

If the software methods didn't work, the problem lies in the hardware. Redmi 4 has three typical hardware malfunctions:

• 🔋 Battery wear. Average battery life — 2-3 year-end (400-500 If the phone lasts longer, the capacity could drop to 60-70% Check it out through AccuBattery or AIDA64.
• 🔌 Oxidation of charging port contacts. Over time, dust and dirt accumulate in the microUSB connector, which worsens contact, which leads to slow charging and increased heat.
• 📱 If the phone doesn't turn on without charging, even at 100% charge, or if it shows "Charging suspended," it's the chip that's to blame. PMIC (boardside the battery).

How to diagnose:

If you decide to change the battery yourself, only take the original battery labeled BM47 (for the Redmi 4 Pro) or BM46 (for the standard version), cheap analogues are 2-3 times smaller and can swell.

5. MIUI Optimization: Hidden Settings to Save Charge

MIUI has hidden features that help extend the life of Redmi 4 by 15-20%. They are not advertised, but they are in the firmware:

• 🔋 Ultra-battery mode, disables all background processes except calls and SMS. Included in Settings → Battery and productivity → Battery mode → Attention: Social media notifications are not working in this mode!
• ⚡ Background restriction for applications. Go to Settings → Annexes → Permits → Autoplay and disable AutoRun for unnecessary programs (such as games or stores).
• 📶 Switch to 2G If you don't use mobile internet all the time, turn on Settings → SIM-maps and mobile networks → Preferred type of network → 2G. 3G/4G consume 3-5 more energy.

Another effective trick is to turn off MIUI animations, which will speed up the phone and reduce the load on the processor.

1. Activate Developer Mode: Settings → About Phone → MIUI version (tap 7 times).
2. Back to Settings → Additionally. → For developers.
3. Find the items: Scale of window animation → No animation, Scale of transition animation → No animation.

1. Turn off Redmi 4.

2.Put Volume up + Power before the Mi logo appears.

3. Select Wipe Cache Partition (control - volume buttons, confirmation - power button).

4. Reboot the phone.

This procedure does not delete data, but clears temporary files that may slow down the system.-->

6.Alternative firmware: when MIUI is the main problem

If you’ve tried everything, but Redmi 4 still runs out in 3-4 hours, MIUI itself may be to blame. This is especially true for firmware older than MIUI 11 – they are optimized worse than newer versions.

Decisions:

• 🔄 Update. MIUI to the latest version. Go to Settings → The phone. → System Update. If there are no updates, download the firmware from the official Xiaomi website and install through the Update → Three points. → Select a firmware file.
• 📱 Install custom firmware. For example, LineageOS or Pixel Experience are consumed on the 20-30% less charge than MIUI. But for this you need an unlocked bootloader and experience with fastboot.
• ⚙️ Reverse to the old version MIUI. If the problems started after the update, go back to the previous firmware, MIUI 10 is considered the most stable for the Redmi 4.

⚠️ Note: When installing custom firmware, Redmi 4 loses its official warranty (if it is still valid), there is also a high risk of "bricking" the phone if you make a mistake. XDA Developers.

💡

Before flashing, be sure to back up through Settings → Additional → Backup and Reset. This will save your data even if something goes wrong.

7.When it's time to carry to service: signs of critical malfunctions

Some problems with the Redmi 4 battery can not be solved by yourself.

• 🔥 Phone heats up above 50°C when charging or using (check through) AIDA64). This is a sign of a power controller malfunction or a short circuit in the battery.
• 💥 The battery is swelling (the phone's body is deformed, the screen is "stepping away" from the frame) This is dangerous - the battery can ignite!
• ⚡ The phone does not hold charge at all (discharges for the phone). 1-2 an hour, even in standby mode) after the battery has been replaced, possibly damaged by the board or controller.
• 📵 Charging only occurs when the cable is in a certain position or interrupted, indicating problems with the microUSB connector or the plume.

Cost of repair in official Xiaomi services (2026):

If the phone is warranty (the maximum period for Redmi is 4-12 months), the repair will be free, but the warranty does not cover mechanical damage (for example, a bloated battery due to a fall).

FAQ: Frequent questions about Xiaomi Redmi battery 4