How to Calibrate Your Battery on Xiaomi Redmi 5 Plus

Xiaomi smartphone owners often experience a situation where the device shows an incorrect percentage of charge or suddenly turns off at 15-20%. These are classic symptoms of desynchronization of the power controller and the software part of the system. For the Redmi 5 Plus model released a few years ago, this problem becomes especially urgent due to the natural wear of lithium-ion cells.

The calibration procedure helps the system re-determine the actual limits of battery capacity, not the physical condition of the battery, but the programmatic correction of the readings, the discharge schedule is reconfigured, allowing the user to see honest statistics and avoid unexpected shutdowns at the most inopportune time.

In this article, we will discuss safe methods for restoring power consumption without using complex software, how to properly prepare the device and what actions to take at different stages of charging to achieve maximum effect.

Signs of the need for battery calibration

There are a number of specific signs that indicate that your Redmi 5 Plus needs intervention, and users often ignore the first “bells” and blame them on the old age of the gadget, although the problem lies in the software failure of the controller.

The main indicator is a jump in percentages, for example, the phone can show 40%, and after a minute it can drop sharply to 10% or turn off, and the alarm is a long charge at the end of the cycle or, conversely, too fast a discharge after reaching 100%.

⚠️ Note: If the device body heats up strongly during charging or operation, software calibration may not help.

The MIUI system on board actively collects usage statistics, and over time, these data can accumulate errors, especially if the user has frequently interrupted charging or used unoriginal cables.

• 📉 Dramatic drop in charge from 30% to 0% in a few minutes.
• 🔋 The device shows 100%, But after the cable is turned off, it immediately drops to 90-95%.
• ⏳ The smartphone “hangs” on one percent of charging for a long time.
• 📉 Phantom discharge in the off state.

Having at least two of these symptoms suggests that it is time to maintain the power grid, ignoring the problem will lead to inconvenience in operation and possible loss of data in the event of a sudden shutdown.

Redmi 5 Plus Preparation for the Procedure

Before any power system manipulations are initiated, careful preparation must be made to ensure that the process is successful and not interrupted by external factors, and the first thing to do is to check the condition of the charger and cable.

Use only the original Xiaomi power supply or certified fast-charging analogues. Poor-quality cables can produce unstable current, which will knock the calibration before it begins. Also make sure the charging port is clean of dust and pile.

It's important to turn off all power-intensive functions that can interfere with accurate measurement. Geolocation, Bluetooth and constant network search are better temporarily deaktivirovat. This will reduce the load on the processor and allow the battery to discharge more evenly.

Back up important data. While the methods described are safe, any manipulation of system files or complete discharging carries a minimal but present risk of software failure.

Remove newly installed applications that may cause conflicts in the system, especially memory cleaners and third-party power saving programs that often run incorrectly on the MIUI shell.

Full discharge and charging method

The simplest and most affordable way to do this, which doesn't require Root rights, is to use a physical charge-discharge cycle, and the idea is to get the battery to a deep discharge state and then fully charge it when it's off.

To start, use your smartphone as normal until it turns off itself. Don't try to turn it on again right away. Let the device lie off for about an hour so that the residual current in the circuit stabilizes.

Then plug the charger, not turning on the screen. The charger should light up. Leave the phone alone until the indicator shows 100%. This may take longer than usual.

When the indicator shows 100%, do not rush to turn off the cable. Leave the device on charge for another 1-2 hours, this is necessary for the procedure top-up, which equalizes the voltage in all banks of the battery.

• 🔌 Wait for the phone to turn off by itself.
• 🔋 Connect the charger to the device turned off.
• ⏳ Wait 100% and keep on charging for another 2 hours.
• 🔄 Then complete the full discharge cycle before shutting down.

Repeat this cycle 2-3 times, and this will help the power controller to "remember" the real limits of the capacity and adjust the table of correspondence voltage and percentage of charge.

Use of engineering menus and codes

For more advanced users, there is a method of resetting battery statistics through an engineering menu. On Xiaomi devices, this is done using special devices. USSD-commands that open access to hidden diagnostic functions.

Enter the phone code in the appendix ##6485##. The menu will open. MB_INFO, We're interested in parameters related to the current charge and the health of the battery.

You can find the option "Battery Reset" or similar on the menu, but on newer versions. MIUI If you don't have that option, just look at the values. MF_05 down 3000 mAh, the software calibration will not help - you need to replace the battery.

💡

If the ##6485### code doesn’t work, try typing it in through the Engineering Mode app, which you can download from the Google Play directory.

There is also a #4636## command that opens the test menu, and go to Battery Information and click Reset Battery Usage Statistics, which will clear the system's discharge data.

After the reset, be sure to complete the discharge and charging cycle described in the previous section. Without a physical cycle, the programmatic reset of the statistics will not give an apparent result.

Calibration through Recovery Mode

One of the most effective methods is to reset the battery data through Recovery Mode, a much deeper method that runs outside the operating system and affects the system cache files.

To enter Recovery mode on Redmi 5 Plus, you need to turn off the device. Then press the volume button and the power button at the same time. Hold them until the Mi logo appears, then release them.

⚠️ Attention: In the Recovery menu, the volume buttons navigate and the power button select. Be careful not to select the "Wipe Data" option that will delete all your files. In the menu, select the language (if available) and find the "Reboot" option, TWRP) There's a separate Advanced section with the battery reset option, and you may not have that option in the drain Recovery, so this is a clean core reset. ADB (Android Debug Bridge on your computer, you can send a command to reset the battery file system. USB and type the command: adb shell rm /data/system/batterystats.bin This command deletes the file that stores the discharge statistics, and after it is executed, the phone must be completely discharged and charged. This will force the system to create a new statistics file from scratch. 📊 How often do you change your battery in your smartphone?Once a year When you stop holding a charge Never use while you're working Planning to buy a new phone Software and applications There are many applications on Google Play that promise to do wonders with the battery. No application can physically restore the capacity of a worn-out battery, and their goal is to optimize consumption and, in rare cases, reset system statistics. The popular Battery Calibration app works on the principle of creating artificial loads. It discharges the phone faster than the user does, helping to pass calibration cycles faster. MIUI It is often restricted by access rights. Most advanced features require Root rights to work. Obtaining superuser rights removes system constraints, allowing applications to interact directly with the power controller, but this is insecure and can lead to unstable system operation. 📱 Applications only work as assistants for charge cycles. 🛠 Root rights are often needed for deep calibration. ⚠️ Third-party software may contain ads and viruses. 📉 The only real effect is full discharge cycles, and if you're not an experienced user, you'd better limit yourself to standard system tools and manual methods, and installing unknown software to "cure" the battery can lead to the opposite effect, which is to increase energy consumption in the background processes. After successful calibration, it is important to follow the operating rules so that the problem does not return in the near future. The Li-ion batteries installed in the Redmi 5 Plus don't like extremes: neither full zero nor constant charging to 100%. The optimal range for a long battery life is between 20% and 80%. Try not to bring the phone to a full shutdown regularly. Frequent deep discharges accelerate the degradation of the chemical composition of the element. 💡The golden rule: It's better to charge your phone a lot and a little bit than to discharge to zero and charge to stop. Temperature is also critical. Don't leave your phone in the sun, on the dashboard of your car, or near the heaters. Overheating is the main enemy of the battery, causing irreversible changes in its structure. MIUI, If it's available in your version of the firmware, it learns your habits and slows down charging at night to keep the battery from running high for too long. ⚠️ Attention: Cheap cables without a protection chip can deliver unstable voltages. Not only does this confuse calibration, it can also disable the power controller on the motherboard. Check battery consumption statistics in the settings regularly. If you notice an application that consumes a disproportionate amount of power, try updating it or removing it. Background processes are a common cause of false charge readings. Frequently asked questions (FAQ) Do I need to calibrate after the firmware update? Yes, after a major update. MIUI Or changing Android versions, it's recommended that you do one full discharge and charging cycle, and that helps the system correctly recalculate the power consumption of new components or optimized processes. Can calibration increase the physical capacity of the battery? No, calibration is a software process. It only corrects the indicator, but it doesn't restore chemical wear. If the battery is physically worn out, it's only going to help if it's replaced at the service center. How often should you do this? No more than once a day. 3-6 Too frequent deep discharge (up to a period of months) 0%) It's harmful to lithium-ion batteries, and it can accelerate their degradation, and you can only do this when you have obvious symptoms of desynchronization, and then you can use it to run out faster after you calibrate it, and it probably used to show false signals. 100%, Now you see the fair percentage, if the discharge is too fast (e.g., if it's too fast, 30% An hour in idleness, it's a sign of physical wear and tear on the battery. Is it safe to use calibration apps? Most of them are safe, but require a lot of permissions. Be careful of apps that require Root access if you are unsure of their developer, and the best method is manual, without installing third-party software.