How to find out the status of the battery on Xiaomi Redmi Note 7: all working methods

Xiaomi Redmi Note 7 is still one of the most popular budget smartphones due to reliable hardware and long support for updates. However, even such a “centenarian” over time, the main problem arises – battery degradation. If your device starts to run out in half a day, suddenly turn off at 20% charge or overheat during charging, it’s time to check the status of the battery.

In this article, you will find 5 proven ways to see the real wear of the battery on the Redmi Note 7 – from hidden engineering menus to specialized applications. We will analyze what are considered normal and when it is time to think about replacing the battery. All methods work on original and custom firmware (including MIUI 12/13/14), do not require root rights and take no more than 5 minutes.

Importantly, the battery status on the Redmi Note 7 can't be measured by the battery life alone, but you need to have accurate data on capacity, number of charging cycles and internal resistance, and that's what we're going to be able to test.

1. Verification through the engineering menu (without applications)

The fastest way to get data on the battery is to use Xiaomi’s hidden engineering menu, which is available on all of the brand’s smartphones, including the Redmi Note 7, and does not require additional software installation.

1. Open the phone application (standard call).
2. Enter the combination: ##4636##
3. In the menu that appears, select Battery Information.

In this section you are interested in the following parameters:

• 🔋 Level of charge (level) – current percentage in digital form (may differ from the one displayed on the screen).
• 🔌 Voltage – the norm for the Redmi Note 7 at 100% charge: 4.35-4.40 V. If the value is below 4.20 V when fully charged – the battery has deteriorated greatly.
• 🌡️ Temperature (optimal 25–40)°C. Exceeding 45°C when charging or working indicates problems.
• 📊 Health - if Good is indicated, the battery is fine. Unknown or statuslessness is a sign of malfunction.

⚠️ Attention: On some firmware MIUI If nothing happens after you enter the code, try the methods in the following sections.

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If the engineering menu doesn’t open, check if it’s disabled in the developer settings. Go to Settings → About Phone → MIUI version and tap it 7 times to activate the developer mode.

Code for checking the number of charging cycles

One of the key indicators of battery wear is the number of full charge cycles. The more, the more degraded the battery. On the Redmi Note 7, you can find this parameter using a special device. USSD-code:

1. Open the Phone app.
2. Enter the combination: ##284###
3. Wait for the window to show up with battery information.

In the results, look for the Charge Count or Battery Charge Cycle Count.

If the code doesn’t work, it could mean that:

• 📱 Your firmware. MIUI modified (e.g. Xiaomi.eu or customized).
• 🔒 The manufacturer has disabled access to this information in new versions of the software.
• 🛠️ In the smartphone installed non-original battery (cloned chip does not display data).

3. Applications for battery diagnostics

If the standard methods didn't work, third-party utilities will come to the rescue, and we tested 5 popular apps and selected the three most accurate ones for the Redmi Note 7:

AccuBattery (recommended)

AccuBattery is the most informative battery analysis app. It shows you:

• 📉 Real battery capacity (compared to factory).
• 🔄 Discharge speed in standby and under load.
• ⚡ Optimum charging current for your battery.
• 📊 History of charging cycles.

How to use:

1. Install AccuBattery from Google Play.
2. Charge the phone to 100% and wait for calibration (takes 1-2 cycles).
3. Go to the Health tab - there will be a percentage of wear.

⚠️ Note: AccuBattery only shows reliable data after 3-5 full charge-discharge cycles!

3.2. CPU-Z

CPU-Z is a universal tool for hardware diagnostics, including battery life, and unlike AccuBattery, it doesn't require calibration and shows data immediately:

• 🔋 Current capacity in mAh (compare with factory 4000 mAh for Redmi Note 7).
• 🔌 Voltage and temperature.
• 📱 Battery model (will help determine the originality).

You can download it here. After installation, go to the Battery tab.

3.3. AIDA64

AIDA64 is a professional tool for deep diagnostics, and in addition to standard battery parameters, it shows:

• 🕒 Time to work since the last charge.
• 📈 Timetable for discharge.
• 🔧 Battery technology (Li-Po or Li-Ion).

The downside of AIDA64 is that you need a paid version to unlock all the features, and the free version is enough for basic check-ups, and you can use a link to the Play Market.

Compare the current capacity with the factory (4000 mAh)|See the number of charging cycles|Estimate the battery temperature when charging|Check the voltage on full charge (should be) ~4.4 V)|Save a screenshot of the data for comparison in a month-->

4. Check through ADB (for advanced users)

If you want the most accurate data on the battery, you can use ADB (Android Debug Bridge), which requires connecting the smartphone to the computer, but gives access to hidden parameters that do not show the application.

Instructions:

1. Install. ADB-PC drivers.
2. Activate USB Debugging on your phone: Settings → About Phone → MIUI Version (shoot 7 times), then Settings → Additional → For Developers → Debugging over USB.
3. Connect the Redmi Note 7 to your computer and type in the command line: adb shell dumpsys battery

In the results, look for the following lines:

• Health - battery status (2 = good, 3 = overheating, 4 = dead).
• Capacity is the current capacity as a percentage of the factory capacity.
• Voltage: Voltage in microvolts (divided by 1000 to get volts).
• Temperature is a temperature in tenths of a degree (for example, 320 = 32.0°C).

Example of output for a healthy battery:

health: 2




capacity: 92




Voltage: 4380000 (4.38 V)




temperature: 305 (30.5°C)

⚠️ Note: If the health setting is 4 or 7, the battery is defective and needs to be replaced!

5. Visual battery check

Sometimes, you can evaluate the battery without software, by external signs.

• 🔋 Bloating of the body – if the back cover began to bulge, and the screen “steps away” from the frame, the battery should be replaced immediately (the risk of fire!).
• ⚡ Sudden shutdowns – if the phone turns off at 20 to 30% charge, battery capacity drops below critical level.
• 🔥 Overheating – if the body is heated above 45°C when charging or running simply, it is a sign of degradation or short circuit in the battery.
• ⏳ Accelerated discharge - if with moderate use (social networks, messengers) the phone sits down in 3-4 hours, the capacity fell by 40-50%.

How to check for bloating:

1. Place your phone on a flat surface (such as a table).
2. Lightly press the center of the back cover - if it bends or "plays," the battery is swollen.
3. Illuminate the flashlight from the side at the junction of the screen and the case - if a gap is visible, this is a sign of deformation.

If you find swelling, you can not:

• 🔌 Keep charging the phone.
• 🔥 Leave the machine unattended (especially at night).
• 🛠️ Self-opening the body (risk of battery damage).

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A bloated battery is a fire hazard, and even if the phone is still working, turn it off immediately and call the service center.

Comparison with factory characteristics

To understand how worn the battery is, you need to compare the current figures with the original characteristics of the Redmi Note 7:

If your performance is very different from the factory, this is a signal to action:

• 🔋 Capacity 60-70% – the battery will still work, but it’s time to think about replacing it.
• 🔌 Capacity below 50% – Urgent replacement, otherwise the risk of sudden disconnection or damage to the phone.
• 🌡️ Constant overheating – check the charger and cable, if the problem persists – change the battery.

The cost of a new battery for Redmi Note 7 (original or high-quality analogue) is 1000-1500 rubles. Replacement in the service center will cost 500-800 rubles additionally. If you decide to change your own, buy a battery with an ATL or SDI chip - they are the most reliable.

7. How to extend the life of the Redmi Note 7 battery

Even if the battery is still in good condition, following a few rules will help slow down its wear and tear:

• 🔌 Don't keep your phone charging all night - after 100% turn off power.Constant 'recharging' shortens lifespan.
• 🌡️ Avoid extreme temperatures – do not leave the machine in the sun or in the cold (optimum 10-35).°C).
• 🔋 Keep the charge at 20-80% – deep discharges and full charges wear the battery more.
• ⚡ Use the original RAM – cheap charging with AliExpress can damage the power controller.
• 📵 Disable unnecessary functions — GPS, NFC, Autobrightness and background activity of applications, if they are not needed.

It is also useful to perform calibration of the battery once every 3 months:

1. Reduce the phone to 0% (until it turns off).
2. Charge to 100% without interruption.
3. Disconnect from charging and use until completely discharged.
4. Repeat the cycle 2-3 times.

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If you leave your phone out of use for a long time (for example, while on vacation), charge it up to 50% and turn it off.Stopping with full or zero charge accelerates degradation.

FAQ: Frequent questions about the Redmi Note battery 7