How to find out the battery capacity on Xiaomi Redmi Note 5: all working methods

Battery is one of the most vulnerable components of the smartphone, and Xiaomi Redmi Note 5 And over time, the battery capacity inevitably declines. 300-500 The charge cycles may lose up to 20-30% But how do you know exactly how much of the factory floor is left? 4000 Official settings? MIUI They don’t show this information, so you’ll have to use hidden features, third-party utilities, or even an engineering menu.

In this article you will find 4 proven ways - from simple (through the help of the scalp). USSD-codes) to advanced (using ADB). We'll also look at how to interpret the data, why the readings might be different from the real readings, and what to do if the capacity is critically low. Importantly, on Redmi Note 5 (codename whyred), some methods only work on stock firmware without customization.

If your smartphone quickly discharges, overheats or turns off at 20-30% charge, this is a direct signal to check the status of the battery. Don’t wait until the phone starts to turn off by 50%: timely diagnosis will help to avoid sudden breakdowns.

1. Testing of the container through USSD-code ##4636##

The fastest way is to use the hidden Android menu, which is available on most Xiaomi devices without root permissions.This method does not require installing apps and works even on a locked bootloader.

Instructions:

1. Open the phone (calling) application.
2. Enter the combination: ##4636###.
3. In the menu that appears, select Battery Information.
4. Pay attention to the line Charge level (Level) and Capacity (Capacity).

What do the numbers mean?

• 🔋 Level: Current percentage of charge (e.g. 85%).
• 📊 Capacity – residual capacity in milliamp hours (for example, 3200 mAh out of 4000 mAh).
• ⚡ Voltage - battery voltage (normal: 3.7-4.2 V).
• 🔄 Technology - Type of battery (should be Li-ion or Li-poly).

⚠️ Attention: On some firmware MIUI (Especially global, this code may not work. If nothing happens after you type in, move on to the next method.

If the Capacity value is well below 3500 mAh, the battery is worn out and needs to be replaced, for example, at readings of 2500 mAh, the real capacity is only 62.5% of the factory capacity, which is critical for normal smartphone operation.

2.Use of the AccuBattery application (without root)

AccuBattery is one of the most accurate battery monitoring applications that doesn't require super-user rights, and it analyzes charging and discharging cycles, and evaluates actual capacity based on data from the power controller.

How to use:

1. Download AccuBattery from Google Play.
2. Launch the app and give you access to battery statistics.
3. Charge the phone to 100% and discharge to 0% (before automatic shutdown).
4. After 2-3 full cycles, go to the Health tab.

What AccuBattery shows:

• 📉 Capacity estimate – approximate residual volume (e.g., 3600 mAh out of 4000 mAh).
• 🔄 Number of charging cycles - the more, the stronger the wear.
• ⚡ Discharge speed – helps to identify “gluttonous” applications.
• 🛑 Charging recommendations – for example, do not keep more than 80 on a charge%.

The app also shows the estimated wear rate as a percentage, if it exceeds the rate. 30-40%, You should think about replacing the battery, like when you wear it down. 50% The real capacity is everything. 2000 MACh, which will lead to frequent recharging.

⚠️ Note: AccuBattery gives approximate data. AccuBattery requires specialized equipment (e.g. tester) to accurately measure. USB-C ammetered).

Disable battery optimization for the application|Charge the phone before 100% undone 2-3 hour|Deplete to 0% chargeless|Repeat the cycle 2-3 time-in-time-->

3. Check through the Engineering Menu (MTK Engineer Mode)

On the Xiaomi Redmi Note 5 with Qualcomm Snapdragon 636 processor, there is an engineering menu where you can see detailed information about the battery, including factory and current capacity. This method requires caution - do not change other settings so as not to disrupt the smartphone.

Step-by-step:

1. Install the MTK Engineer Mode app (which works on Qualcomm).
2. Open it and go to Hardware Testing → Battery.
3. Note the parameters: Battery Capacity is the current capacity. Battery Voltage is the voltage. Battery Temperature is the temperature (normal: 25-40 ° C).

Decoding of data:

If the engineering menu displays Unknown instead of capacity, the battery controller is not transmitting data.

• 🔌 Problems with battery contacts.
• 🛠️ Failure of the power controller.
• 📱 Custom firmware with remote diagnostic functions.

Advanced Method: Testing through ADB (for experienced)

If previous methods failed, you can get battery data through Android Debug Bridge (ADB), a method that requires a computer and basic command line knowledge, but provides the most complete information.

Instructions:

1. Download and install ADB Tools on PC.
2. Turn on Developer Mode on Redmi Note 5: Go to Settings → About Phone. 7 times click on MIUI Version. Return to Settings → Additional → For Developers and enable USB Debugging.

adb shell


dumpsys battery

Example of output (key parameters):

level: 78


scale: 100




voltage: 3987 (mV)




temperature: 310 (31°C)




current now: 1200 (mA)




charge counter: 3100 (mAh)




health: 2 (Good)

Transcript:

• 📊 charge counter - current capacity (in example 3100 mAh).
• ⚡ current now - discharge current / charge (positive value - discharge, negative - charge).
• 🌡️ Temperature - temperature in tenths °C (310 = 31°C).
• 💡 Health: 2 - battery in good condition (Good) 3 - required replacement (Overheat or Dead).

⚠️ Note: The charge counter can be reset after rebooting or disconnecting the battery. For accurate measurements, use it with data from AccuBattery.

💡

If ADB Does not recognize the device, update Qualcomm drivers or try another USB-Often the problem is that the cords are not original, which do not support data transmission.

5. How to interpret the results: norm and deviations

Once you get the capacity data, it's important to evaluate it correctly, and here's a table of recommendations based on the residual capacity:

Additional signs of battery wear on the Redmi Note 5:

• 🔥 The phone warms up strongly when charging or playing.
• ⚡ Charge drops from 30% to 0% in a few minutes.
• 🔌 Not charged to 100% (for example, stops at 80%).
• 📉 Working hours have been reduced in 2-3 time compared to the new state.

If the capacity is below 3000 mAh, but the phone is still "holding", try calibrating the battery:

1. Discharge the phone before automatically shutting down.
2. Charge up to 100% without interruption (use the original adapter).
3. Disconnect from charging and reset via Settings → Additional → Reset settings (without deleting data).

💡

Calibration only helps when the controller fails, but does not restore the physically worn-out battery. If the capacity is below 2500 mAh, a replacement is inevitable.

6. What to do if the capacity is critically low?

If the test shows wear and tear of more than 40 percent, there are two options: try extending the battery life or replace it.

Ways to extend the operation of the old battery:

• 🔌 Use slow-charging (5V/1A) instead of fast.
• 🌡️ Avoid overheating (do not play games in the sun, do not cover your phone).
• 📵 Turn off the background activity of applications in Settings → Annexes → Auto-start.
• 🔄 Do not discharge below 20% and do not charge above 80% (optimal range).

Battery replacement:

1. The original battery for the Redmi Note 5 has the article MBJ406150 (4000 mAh).
2. The cost of replacement in the service center: ~1500-2500 rubles (with work).
3. When replacing yourself, use B-7000 glue and plastic shoulder blades to avoid damaging the plumes.

Where to buy a high-quality battery:

• 🛒 Xiaomi's official stores (e.g. mi.com).
• 📦 Verified sellers on AliExpress (look for rankings) >98%).
• 🔧 Service centers with a guarantee for spare parts.

⚠️ Note: Cheap non-original batteries (for example, on the 5000 MACh often has a real capacity 2000–2500 mAh and can swell through 2-3 month.

FAQ: Frequent questions about the Redmi Note battery 5