How to check the battery status on Xiaomi Redmi Note 7: the complete guide

The battery is one of the most vulnerable components of the Xiaomi Redmi Note 7, which over the years loses capacity and discharges faster. If your smartphone starts to turn off at 20-30% charge, overheat during charging or requires recharging by the evening, these are clear signs of battery wear. In this article, we will discuss 6 reliable ways to check the battery status on the Redmi Note 7, including hidden engineering menus, third-party applications and data analysis through ADB.

The Redmi Note 7 features a built-in 4,000mAh lithium polymer battery that is not intended to be replaced by the user, which means that the diagnostics must be as accurate as possible to avoid unnecessary repairs, and we will also tell you which are considered normal for the 2019 battery and which signal the need for replacement.

1. Check through the hidden engineering menu (#4636##)

The fastest way to get basic battery information is to use the built-in Android engineering menu, which is available on all Xiaomi smartphones, including the Redmi Note 7, and does not require the installation of additional apps.

To open the menu:

1. Open the Phone app.
2. Enter the combination: ##4636## (some firmware may require ##4636*#*#).
3. Select Battery Information (Battery Information).

In this menu, pay attention to the following parameters:

• 🔋 Level of charge (level) – current percentage in digital form (may differ from the indicator in the status bar).
• 🔌 Power source – shows whether the smartphone is connected to charging (AC — network adapter, USB — computer).
• 🌡️ Temperature: Normal values from 25°C to 40°C. If the temperature is above 45°C in normal use is a sign of malfunction.
• ⚡ Voltage: Must be between 3.7 and 4.2 V when fully charged, values below 3.5 V indicate a deep discharge.

⚠️ Note: If the menu does not open after entering the code, check if the engineering functions in the developer settings are disabled. → The phone. → Version. MIUI and tap 7 times on this item to activate the developer mode. → Additionally. → For developers, turn on the option Enable the engineering menu.

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If the engineering menu doesn't open, try using the alternative code ##2846579## → ProjectMenu → Background setting → Battery test. This method works on some MIUI 10-12 firmware.

2. Data analysis via MIUI Battery Settings

Xiaomi has built into MIUI detailed battery usage statistics that help identify anomalies.

1. Go to Settings → Battery and performance.
2. Slap the icon. ⚡ in the upper right corner (or select Battery Use).
3. Scroll down to the graph Battery status.

Here you'll see:

• 📊 Discharge schedule – if it is uneven (sharp jumps), this may indicate unstable operation of the power controller.
• ⏱️ Screen life – in normal battery condition, the Redmi Note 7 should keep the screen on for 5-7 hours at an average load.
• 🔄 Charging cycles – if the smartphone was charged more than 500 times, the battery capacity could decrease by 20-30%.

On the Redmi Note 7 with MIUI 13+ firmware, the Battery Health option appears on the battery menu, which shows the remaining capacity as a percentage, and if this is below 80%, the battery needs to be replaced.

3. Use of diagnostic applications (AccuBattery, CPU-Z)

Standard MIUI tools provide limited information, and third-party applications are better for deep diagnostics, and we recommend two proven options:

AccuBattery (free version)

This app analyzes the actual battery capacity, the number of charging cycles and the wear rate.

1. Charge your smartphone to 100% and disconnect from the network.
2. Use your phone as normal until the charge drops to 20%.
3. Open AccuBattery and go to the Health tab.

Pay attention to:

• 📉 Designed capacity – if it is below 3200 mAh (originally 4,000 mAh), the battery is severely worn out.
• 🔄 Cycle count – more than 500 cycles is considered a high score for the Redmi Note 7.
• ⚡ Charging speed – normal speed for the original RAM – 15–18 W.

CPU-Z

This application provides technical data about the battery, including:

• 🔋 Current charge level in millivolts (mV).
• 🌡️ Real-time temperature.
• 📊 Health (Health) – It should be good.

⚠️ Attention: Some applications (e.g, 3C Battery Monitor) requires root access to get full data. On Redmi Note 7, getting root can lead to loss of warranty and problems with the system. MIUI. Use them only if you are confident in your actions.

4. Check through ADB (for advanced users)

If you want the most accurate data, you can use Android Debug Bridge (ADB), which requires connecting your phone to your computer, but gives you access to hidden battery settings.

Instructions:

1. Install ADB Tools on your PC.
2. Turn on USB Debugging on your phone: Settings → About Phone → MIUI Version (Tap 7 times) → Settings → Additional → For Developers → Debugging over USB.
3. Connect the Redmi Note 7 to your computer and execute the command:

adb shell dumpsys battery

In conclusion, note:

• 🔋 level - current charge in percentage.
• ⚡ Voltage - voltage (normal: 3700-4200 mV).
• 🌡️ Temperature: Temperature in tenths of a degree (e.g, 320 = 32.0°C).
• ⚠️ health - battery status (2) = Good, 3. = bad).

If the health parameter is 3, it means that the battery controller is fixing critical errors and needs to be replaced.

adb shell dumpsys batterystats

5. Visual signs of battery wear

Programs or teams are not always required, and some problems can be identified by the following:

• 🔥 Overheating – if the phone’s body heats up even under minimal load (such as standby), it’s a sign of battery degradation or short circuiting.
• 📵 Spontaneous shutdowns – if the Redmi Note 7 turns off at 20–30% charge, this indicates incorrect calibration of the controller or physical wear and tear.
• 🐢 Slow charging – if the phone charges more than 3 hours from the original RAM, there may be a battery or port problem USB-C.
• 🔋 Battery bloating - if the back cover of the phone has become convex or there are gaps between the screen and the case, stop using immediately!

Battery bloating is especially dangerous, as it can damage the screen or even fire. If you notice a deformity in the case, don't try to disassemble the phone yourself, contact the service center.

⚠️ Attention: On the Redmi Note 7, the bloated battery often presses on the touchscreen plume, leading to "ghost" touches or broken areas of the screen. If you notice such symptoms, check your phone for bloating.

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If the phone turns off at 20 to 30 percent charge, it's not always the battery's fault, and it's possible: a faulty power controller, a damaged charging connector, or a firmware failure. Check these components before you change the battery.

Calibration of the battery (if the percentage is incorrect)

Sometimes the problem isn't with the battery itself, but with the power controller calibrating incorrectly, which causes the phone to show, for example, 50 percent charge, and then suddenly shut down after 10 minutes.

1. Discharge the phone before automatically shutting down.
2. Connect the original charger and charge up to 100% without interrupting the process.
3. Turn off the charger and turn on the phone. If the percentage jumped again (for example, from 100% to 80%), repeat the procedure 2-3 times.

You can use the Battery Calibration app to calibrate more accurately, but it requires root access, and without it, the effectiveness of this method is limited.

If calibration doesn’t help, the problem may be:

• 🔌 Faulty charging controller (requires motherboard repair).
• 📱 Firmware failure (try resetting to factory settings).
• 🔋 Physical wear of the battery (requires replacement).

Frequent questions about the Redmi Note 7 battery