Xiaomi Redmi Note 5 battery check: a complete guide with codes and programs

Xiaomi Redmi Note 5

Redmi Note 5

20-40%

If your smartphone starts to run out in a few hours or turns off at 15-20% charge, these are the sure signs of battery wear. In this article, we will discuss all the available ways to check the battery on the Xiaomi Redmi Note 5: from hidden engineering menus to professional applications, you will learn how to determine the real wear without disassembling the phone and when it is time to think about replacing the battery.

It is important to understand that the state of the battery affects not only the autonomy, but also the performance of the device. When the wear is severe (more than 50%), the Redmi Note 5 can start to brake, as the power controller restricts the power supply to protect the battery.

1. Check through the engineering menu (codes ##)

The fastest way to get data about a battery is to use hidden service codes that run on MIUI stock firmware without having to install additional software. The Redmi Note 5 has two basic codes available:

Code for checking battery status:

##4636##

After you enter, the Testing menu will open, where you will select Battery Information.

• 🔋 Charge level (in percent and millivolts)
• 🌡️ Temperature (normal: 25-40°C when charging, until 50°C - critical value)
• 🔌 Type of charging (AC, USB wireless)
• ⚡ Voltage (normal for Li-Pol: 3.7–4.4V)

Code for testing hardware components:

##6484##

This code starts an advanced testing, where you can see more detailed information in the Battery section, including the actual battery capacity in mAh (milliamp-hours). Compare this value with the passport 4000 mAh for the Redmi Note 5. If the difference is more than 30%, it is time to change the battery.

⚠️ Note: Some firmware may have the engineering menu blocked. If the codes don't work, try entering them through the standard Phone app instead of through the lock screen.

2.Use of the AccuBattery application

AccuBattery is one of the most accurate applications for monitoring battery status, analyzing charging/discharge cycles to calculate the actual battery capacity. This is especially true for the Redmi Note 5, as it takes into account the features of the Qualcomm Snapdragon 636 power controller.

How to use:

1. Download AccuBattery from Google Play.
2. Go through the initial setup by selecting the Li-Po battery type and specifying the passport capacity of 4000 mAh.
3. Charge your phone to 100% and wait until it is fully discharged (until it is automatically turned off).
4. In the Health section, you will see the real capacity and percentage of wear.

Example report for a battery with 25% wear:

AccuBattery also shows you how much battery life you have based on your usage habits, for example, if you're actively using the mobile Internet, the app will predict how many hours your phone will last without recharging.

⚠️ Note: For accurate results, use AccuBattery for at least 3-5 days. The first data after installation may be incorrect due to lack of statistics.

3. Visual examination and physical signs of wear

Some battery problems can be detected without software, by external signs.

• 🔥 Overheating – if the case heats up strongly even under minimal load (e.g. during a bell), it is a sign of battery degradation or short circuit within the cell.
• 📉 Bloating - check if the back cover is curved. Redmi Note 5 batteries often lift the screen when bloated or make it sensitive to pressing.
• ⚡ Spontaneous reboots – if the phone turns off at 15-30% charge, this indicates an incorrect calibration of the power controller.
• 🔌 Slow charging – if the smartphone charges longer than 3 hours from the original RAM, there may be a problem with the battery or port.

To visually check for bloating, place your phone on a flat surface and press the center of the back lightly. If there is a backlash or a back cover is playing, it's a sign of a bloated battery. Also, look at the screen: if it starts to move away from the body at the edges, this is another alarm.

What to do when you're bloating:

1. Stop using your phone immediately – there is a risk of fire!
2. Do not attempt to puncture or compress the battery.
3. Contact the service center for a replacement.

4. Check through ADB (for advanced users)

If the engineering codes don't work or you want to get the most accurate data, you can use ADB (Android Debug Bridge), which requires connecting the phone to a computer, but gives access to hidden battery settings that standard applications don't show.

Instructions:

1. Enable USB Debugging in the Developer Settings (Settings → About Phone → MIUI Version – Press 7 times, then return to Additional → For Developers).
2. Connect Redmi Note 5 to your PC and confirm debugging permission.
3. Open the command line (Windows) or terminal (macOS/Linux) and type in: adb shell dumpsys battery
4. Look for the lines of capacity, voltage, and technology.

Example of output for a battery with wear:

current now: 2800000 µA (2800 mAh)




Capacity: 70 (70% of original capacity)




voltage: 3850 mV




temperature: 350 (35.0°C)

The key here is capacity. If it's below 60 percent, the battery is very worn out. Also, note the voltage: if the voltage at 100 percent charge is below 4.2V, it indicates degradation of the elements.

Install Xiaomi drivers on PC|

Enable debugging on USB|

Download ADB Tools (platform-tools) |

Connect your phone to the original cable-->

5. Test using the CPU-Z application

CPU-Z is a well-known tool for diagnosing hardware in Android devices, which not only shows the specifications of the processor, but also details about the battery, including real voltage, temperature and health status.

How to check the battery:

1. Install CPU-Z from Google Play.
2. Go to the Battery tab.
3. Pay attention to the parameters: 📊 Health – if Good is indicated, battery is normal; Unknown or Dead – replacement is required. 🔌 Plugged – Type of connection (AC/USB). ⚡ Voltage is the norm for the Redmi Note 5: 3.8–4.3V.

The CPU-Z also shows uptime and current energy consumption in mA. If the standby consumption exceeds 50–100 mA, this may indicate background processes or battery wear.

Tip: Compare CPU-Z readings to AccuBattery data. If both apps show wear and tear of more than 30%, consider replacing the battery.

💡

For a more accurate test, charge your phone to 100%, then disconnect from the network and launch the CPU-Z. After 1-2 hours, check how much percent is lost - this will help estimate the real energy consumption.

6. Battery calibration (if the phone shows the wrong percentage)

Sometimes the Redmi Note 5 starts to display the charge level incorrectly, for example, jumps immediately from 30% to 1% or turns off at 20%.

Method 1: Complete discharge/charging cycle

1. Discharge the phone before automatically shutting down.
2. Connect the original RAM and charge for at least 8 hours (even if the indicator shows 100%).
3. Turn off the network and use the phone until it is completely discharged.
4. Repeat the cycle 2-3 times.

Method 2: Resetting battery data via Recovery

1. Turn off the phone.
2. Press Volume Up + Power to enter Recovery Mode.
3. Choose Wipe & Reset → Wipe Battery Stats (if there is one).
4. Reset the device.

⚠️ Note: Calibration only helps with software failures. If the battery is physically worn out (blown, loss of capacity), calibration will not return it to its previous characteristics.

When to change the battery: criteria for the Redmi Note 5

Based on the manufacturer’s data and service center statistics, the Redmi Note 5 battery replacement is required at the following parameters:

The cost of replacing the battery with the Redmi Note 5 in 2026:

• 🔧 Original battery: 1500-2500 rubles (depending on the region).
• 🔧 Analogue (quality): 800-1500 rubles.
• 🔧 Self-substitution: 500–1000 RUB (requires skills and tools).

Where to buy a battery:

• 🛒 Xiaomi Service Centers (Warranty 6-12 Months).
• 🛒 Proven online stores (e.g. AliExpress with a seller rating above 98%).
• 🛒 Local workshops (check whether they give a guarantee for work).

💡

If the actual battery capacity falls below 60% of the original (2400 mAh for the Redmi Note 5), replacing will not only improve battery life, but also reduce the risk of a sudden phone shutdown.

FAQ: Frequent questions about the Redmi Note battery 5