Why Xiaomi Redmi Note 5 is fast discharge and how to fix it: the full guide 2026

Your Xiaomi Redmi Note 5 He's been on a charge for a day, and now he's barely out of the evening? 20-30% for an hour in standby mode and after 10 Minutes of games or videos are still there. 50%? This problem is familiar to many owners of the model released in the 2018 There are a dozen reasons, from software failures to physical battery wear, and in this article, we'll look at all the possible causes and give you step-by-step instructions on how to restore the autonomy of the smartphone.

First, let's define what counts as normal. - New Redmi Note 5 battery-powered 4000 mAh at an average load (social networks, messengers, 2-3 Time of the day, should keep the charge 12-16 If the phone runs out of power, 4-6 Now, this is a concern, and it's important to understand that over time, the battery capacity decreases, and over time, it decreases. 3-4 She may lose a year. 30-40% But often the problem is not the aging, but the settings or background processes.

We analyzed the feedback from owners, Xiaomi’s technical documentation and test results, and we compiled a checklist of 12 working methods, from simple (software optimization) to radical (battery replacement).

1. How to check the real state of the Redmi Note 5 battery

Before you fix anything, you need to know what's wrong, and 80 percent of the time, you're guilty of an "obsolete battery," even though the problem is software or settings. Here's how to check the battery's health:

Method 1: Use the test menu (hidden engineering mode) and enter the phone code in the app:

##4636##

Select Battery Information. Pay attention to the parameters:

Charge level (should match the indicator in the status bar);

- Condition (if Good is indicated - everything is fine with the hardware);

- Temperature (normal: 25-40°C; if higher 45°C - overheating).

Method 2: AccuBattery (free on Google Play) shows:

Real capacity (for example, 3200 mAh instead of the declared 4000 mAh);

- Discharge rate in mA/h (standby norm: 50-150 mAh);

- Number of charging cycles (after 500 cycles, the capacity falls on 20-30%).

Method 3: Visual inspection. If the battery is swollen (the phone body is convex, the screen is moving away from the frame), it must be replaced urgently, it is dangerous to health! Also check whether the phone warms up when charging or in plain.

⚠️ Note: If the real capacity in AccuBattery is less 2500 mAh, and the phone runs out of 2-3 Calibration and optimization won't help. We need to replace the battery.

2. Software reasons for quick discharge: what to disable in the settings

Most often, the battery dies due to background processes, auto updates and unnecessary services. MIUI There are several “gluttonous” features that can be safely turned off.

Top.-5 settings that eat up charge:

• 🔍 Continuous search Wi-Fi/Networks: Disable in Settings → Wi-Fi → Additionally. → Searching for the web is always active.
• 📡 Auto-Update Apps: Go to Google Play → Settings → Auto-update of applications → Choose Never.
• 📍 Geolocation and Google Services: In Settings → Annexes → All applications → Google Play Services → Battery select Limit background activity.
• 🔔 Notifications from unnecessary applications: C Settings → Notifications → Notifications Management Disable Notifications from Games and Rarely Used Programs.
• 🌙 Adaptive lighting: In Settings → Display. → Adaptive backlighting turn off this function and set fixed brightness at the level 40-50%.

Another hidden charge eater is the dual app function (if you've used it), which creates a copy of messengers that run in the background to turn off:

1. Go to Settings → Applications → Double Apps.
2. Remove unnecessary duplicates (such as a second WhatsApp or Telegram).
3. Reboot the phone.

3. Battery calibration: when it helps and when it is useless

Calibration is a reset of the power controller, which sometimes starts to show the wrong level of charge (for example, the phone turns off by 30%, although in fact the battery is empty), this will not restore capacity, but will help correct the display errors.

How to Calibrate Your Battery on Redmi Note 5:

Calibration helps if:

- The phone suddenly turns off when 10-20% charge;

- After charging until 100% battery 10-15 minute;

In AccuBattery, the discharge graph “jumps” (for example, from 50% immediately to 20%).

⚠️ Note: Calibration will not help if the actual battery capacity is less 3000 mAh or phone discharges for 2-3 In this case, you need to replace the battery.

Background applications: how to find and stop "energy vampires"

Even in standby mode, some apps continue to consume power, such as Facebook or Instagram, which can eat up to 10% of the battery per hour due to background activity.

Step 1. Checking battery consumption:

1. Go to Settings → Battery and Performance → Battery Use.
2. Click on the three dots in the top right corner and select Battery Usage Statistics.
3. See which apps consume the most charge (the top will be the most "glutty").

Step 2: Limit background activity:

• 📱 For system applications: Settings → Annexes → All applications → [name] → Battery → Limit background activity.
• 🔄 For user applications: Settings → Battery and productivity → Choice of battery mode → Choose Charge Savings for Problem Programs.
• ❄️ Deep Optimization: In Settings → Battery and productivity → Battery settings → Battery Optimization Enable Optimization for All Applications.

Step 3: Manual closure of applications:

Despite the myths, forced closure of applications does not always save charge, but if the program hangs in the background and actively uses the Internet (for example, if the program is used in the background, VK Or TikTok, it should be closed:

Open the menu of the latest applications (swipe up with a delay).

Close unnecessary programs with swipe up.

💡

If the battery consumption is on the Android System or MIUI Daemon, this may indicate a firmware failure. Try resetting to factory settings (see section 6).

5.Firmware Update: Why It Matters for the Battery

Xiaomi regularly releases updates that optimize power consumption.If your Redmi Note 5 runs on an older version MIUI, This could be causing a quick discharge:

Check the current version:

- Go to Settings. → The phone. → Version. MIUI.

- The latest stable version for Redmi Note 5 (codenamed Whyred) — MIUI 12.5 (Android 10) If you are older, upgrade.

How to update firmware:

1. Connect to a stable Wi-Fi network (update "weighs" 1.5-2 GB).
2. Go to Settings → About the phone → System update.
3. Click Check Updates and wait for the download.
4. Click Reboot and Update (Make sure the battery is charged) >50%).

If the update is not available, you can install it manually:

1. Download the firmware for whyred from Xiaomi’s official website (choose Stable, not Developer!).
2. Put the file in the folder. downloaded_rom root-directory.
3. Go to Settings → About Phone → System Update → Three Dots → Select a firmware file.

💡

Updating the firmware can increase the battery life on 15-20%, If the new version corrects power errors.

6.Reset to factory settings: a radical but effective method

If all previous methods failed, and the battery is still running out too quickly, it is worth trying a full reset, which will delete all data, but return the phone to a "clean" state, without background processes and debris.

How to make a reset (hard reset):

1. Save important data (photos, contacts, messages) to Google Drive or your computer.
2. Go to Settings → About Phone → Backup and Reset → Reset settings.
3. Choose to erase all data and confirm the action.
4. After the reboot, set your phone up as new (don’t restore backup – it could bring back old issues!).

If the phone doesn’t turn on or freezes, reset via Recovery mode:

1. Turn off the phone.
2. Press the Power button + Volume up for 10 seconds.
3. In the Recovery menu, select Wipe Data → Wipe All Data (manage by volume buttons, confirm by power button).
4. After reset, select Reboot.

⚠️ Note: Resetting will not help if the problem is physical wear and tear of the battery (for example, the actual capacity of 2000 mAh.

7. Battery replacement: when it is needed and how much it costs

If all software methods have been tried and the battery is still running out of power. 3-4 It's time to think about replacing the average battery life in the Redmi Note. 5 — 2-3 year 500-800 Then the capacity drops to the bottom. 30-50%, And the phone holds the charge in 2-3 less.

Signs that the battery needs to be changed:

• 🔋 Real capacity in AccuBattery is less than 2500 mAh.
• 🔥 The phone warms up strongly when charging or in simple.
• 💥 Battery swelled (the phone body deformed).
• ⚡ The phone's running out. 10-15% post 10-15 minutia.
• 🔌 The charge is jerky (fast, then slow).

Cost and replacement options:

If you decide to change yourself, you will need:

New battery (check compatibility with Redmi Note 5)

- Plastic shoulder blade or mediator;

- Clay. B-7000 (fixing);

- Fryer (to soften old glue).

💡

Before replacing the battery, discharge the phone to 20-30% — This will reduce the risk of short circuits during dismantling.

8.Extra tips: how to extend the life of the battery

Even after battery replacement or optimisation, it is worth keeping an eye on proper operation to ensure the battery lasts longer.

How to charge Redmi Note 5 so that the battery does not spoil:

Applications for battery monitoring:

AccuBattery (shows real capacity and discharge speed);

GSam Battery Monitor (detailed statistics on applications);

Battery Guru (Temperature and Charging Cycles).

If you play or watch videos often, try the game mode. MIUI:

- Go to Settings. → Special facilities → Game mode.

- Turn on the option Battery Optimization in games.

This will limit background processes and reduce processor heat.

💡

Compliance with simple charging rules (20-80%, Original RAM, avoiding overheating can extend the life of the battery on the 30-50%.

FAQ: Frequent questions about the Redmi Note battery 5