Xiaomi Redmi 4A Fast discharge: all causes and solutions

Owners of Xiaomi Redmi 4A often face the problem of rapid discharge of the battery – the device, which used to hold a charge for a day, now requires recharging every day. 4-6 The reasons can be as in the natural wear of the battery (smartphone already). 7+ years from the date of release in 2016 In this article, we will examine all possible factors, from background processes to physical battery damage, and give step-by-step instructions on how to diagnose and fix the problem.

Feature of Redmi 4A It's equipped with a battery. 3120 And it's a mAh that, even in its new state, didn't have record autonomy. 20-40%, But it's not always the battery's fault, because it's often power applications, outdated firmware, or poor energy-saving settings that are at fault. MIUI 9+) And we will offer solutions that will help to return the smartphone to its former autonomy.

1. Natural wear of the battery: how to check the condition

Average life of lithium-ion batteries — 2-3 year 500-800 The Redmi's charging cycles. 4A, released 2016–2017 years, battery to 2026 This year is almost guaranteed to be lost. 30-50% You can check the current state without disassembling the device:

• 📱 From the engineering menu: type ##4636## in the dialer, select Battery Information. Health should show Good (good) or Unknown (diagnosis required).
• 🔋 Specialized applications: AccuBattery (shows real capacity) or CPU-Z (Battery section. If the capacity is below 2000 mAh, the battery is critically worn out.
• ⚡ Testing: Charge your phone to 100%, Turn off the charger and use it as normal. 2-3 hour-long discharge 50% — capacity has dropped by a minimum 40%.

Important: if the battery is swelling (the body of the smartphone has become convex, the screen is "stepping away" from the frame) - immediately stop using! These batteries can ignite when charging, in which case a complete replacement at the service center is required.

⚠️ Note: Do not use “fast” chargers with higher power 5V/2A for Redmi 4A. The power controller of this model does not support Quick Charge, and the increased current will accelerate the degradation of the battery.

Programmatic reasons: applications and processes that eat away at charge

Even with a worn-out Redmi battery 4A It can work a day if you set up the software correctly»:

• 🎮 Games and heavy applications: PUBG Mobile, Genshin Impact or even Facebook in the background consume up to 10-15% charge per hour. Check the settings. → Battery → Battery utilization.
• 📡 Mobile Internet and GPS: constant 4G/LTE or geolocation (for example, in Google Maps or Yandex.Navigator) drains the battery on the 20-30% faster.
• 🔄 Auto Updates and Syncs: Turn off automatic app updates in Google Play and Mi sync Cloud/Google Background account.
• 🤖 Viruses and malware: Some Trojans masquerade as system processes (e.g. com.android.system) and load the processor.

How to find and fix the problem:

1. Open the Settings. → Battery → Battery usage and sort applications by consumption. >5% in the background – limit its activity.
2. Enable the Power Saving Mode: Settings → Battery → Power saving mode (select "Balanced" or "Super Energy Saving»).
3. Check the autoboot: Settings → Permits → Auto-Start and Disable Unnecessary Applications.

3. Firmware failures: why updates MIUI speed up

Xiaomi Redmi 4A Updates to the updates are officially up to MIUI 11 (Android-based 6.0 Marshmallow), but many users install custom firmware or unofficial ports MIUI 12/13. The problem is that the new OS versions are optimized for modern processors (Snapdragon). 6xx/7xx), Redmi. 4A Equipped with a weak Snapdragon 425. This leads to:

• 🐢 Increased load on CPU: new animations and functions MIUI force the processor to work at the limit, which increases battery consumption 15-25%.
• 🔄 Frequent reboots of the core: if the smartphone “hangs” and reboots – this is a sign of incompatibility of firmware with iron.
• 📡 Modem problems: After an update, the network may disappear or the signal deteriorates, which causes the phone to constantly search for a connection.

Decisions:

• Reverse to the stable version MIUI 9/10 (You can download it on the official Xiaomi website).
• If you use custom firmware (like LineageOS), check for Snapdragon 425 compatibility on the forum. 4PDA.
• Reset the settings to factory: Settings → Additionally. → Recovery and reset (pre-recover backup!).

⚠️ Note: Do not install firmware for other models (e.g. Redmi) 5A) — This will result in the complete inoperability of the device ("Brick»).

Check the version of MIUI in Settings → About the phone

Make sure the firmware is official (not custom)

Turn off automatic software updates

Make a backup of data before resetting

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4. Hardware malfunctions: what breaks down in Redmi 4A

In addition to the battery, the fast discharge can be affected by other components of the smartphone:

Redmi's most common hardware problem 4A — It's oxidizing the contacts of the battery, and it's getting moisture or condensation on the connector, and it's making the connection worse:

• A jump-like charge level (for example, from 50% immediately to 15%).
• Spontaneous reboots when connecting charging.
• Heating the hull in the battery area.

Solution: gently wipe the battery and connector contacts with a cotton swab dipped in isopropyl alcohol (do not use vodka or acetone!). If the oxidation is strong, you will need to replace the connector.

5. Power saving settings: what to turn off to extend the work

Even with a worn-out battery, Redmi can extend the life of the battery. 4A on 30-50%, If you set the system up correctly, optimal parameters:

• 📵 Flight mode: turn it on in low-signal areas (metro, basement) and search for the network consumes up to 10% of the charge per hour.
• 🔦 Screen brightness: set up 30-40% manually and turn off adaptive lighting (Settings) → Screen).
• 🔄 Background Update: Disable for all apps except messengers (Settings) → Annexes → Auto-start).
• 📍 Geolocation: Use only when necessary. Enable "Only by" mode GPS» (without internet) in Settings → Location.

Additional tricks:

• Set a dark topic (for the purpose of the AMOLED-It's not a good idea, but on Redmi. 4A s IPS-matrix reduces the load on the lighting).
• Turn off vibration when dialing and animation interface (Settings) → Additionally. → Special facilities → Remove animations).
• Use lightweight versions of applications (Facebook Lite, Messenger Lite, YouTube Go).

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If your phone is idle (e.g. at night), switch it to Do Not Disturb mode with mobile data turned off, saving up to 20% of charge in 8 hours.

Alternative methods: from calibration to battery replacement

If all software methods have been tried, and the battery runs out in a few hours, it’s time to consider radical measures:

Calibration of the battery

Sometimes the power controller will not display the charge level correctly (for example, it will show 50%, and after a minute the phone will turn off) to reset the data:

1. Discharge the phone before automatically shutting down.
2. Connect to charging and do not turn on during 8-12 hours.
3. After full charging, turn off the power and turn on the device.
4. Repeat the cycle 2-3 times.

Battery replacement

The cost of a new battery for Redmi 4A — 500-1200 RUB (depending on capacity: original on 3120 mAh or enhanced versions on 4000+ Self-replacement is possible, but requires care:

• Buy a battery with a thermal sensor (without it, the phone will not see the charge).
• Use plastic blades for disassembly - metal will damage the plumes.
• After replacement, perform calibration (see above).

⚠️ Note: Don’t buy batteries with AliExpress for a lower price 400 Rubles are fakes with real capacity 1500-2000 mAh that will serve 2-3 month.

Use of Power Bank

If the replacement of the battery is not advisable (for example, the phone is used as a backup), buy an external battery with a capacity of 10,000 mAh.

• Charge Redmi. 4A 3-4 plug-free.
• Use your phone when traveling without looking for charging.
• Extend the life of a native battery (less charging cycles) = slow-wear).

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Replacing the battery at the service center will cost 1500-2500 If the phone is rarely used, it is cheaper to buy an external battery (~1000 ruble.).

7. Frequent user errors that speed up the discharge

Many Redmi owners 4A They're reducing their battery life by following harmful advice:

Another common mistake is the use of Google Play charging accelerators, which supposedly “optimize” the process, but in fact:

• Close background processes, which leads to data loss in messengers.
• Load the processor, increasing battery consumption.
• They may contain malicious code (e.g., display ads in notifications).

FAQ: Answers to Frequent Questions