How to check the battery status on Xiaomi Redmi Note 7: instructions and secrets

Xiaomi Redmi Note 7 is one of the most popular budget smartphones, but over time, even its capacious battery of 4000 mAh begins to lose capacity. If the phone runs out too quickly or suddenly turns off at 20-30% charge, it’s time to check the battery status. In this article, you will find 5 working methods of diagnosis, from hidden engineering menus to specialized applications.

It's important to understand that battery wear is a natural process. 300-500 Full charging cycles may decrease capacity 20-30%, through 2-3 year of operation, up to 50%. We will show you how to accurately measure current wear without disassembling the phone, and what to do if the battery is already tired».

1. Verification through the engineering menu (without applications)

The most reliable way is to use the hidden MIUI engineering menu, which contains detailed information about the battery, including the actual capacity in mAh, voltage and the number of charging cycles, which requires no root rights and works on any version of the firmware.

To open the menu:

• 📱 Open the phone app and enter the combination: ##4636##
• 🔧 In the window that appears, select Battery Information (or Battery Information in English firmware).
• 📊 Pay attention to the parameters: Level - current charge in percentage; Voltage - voltage (normal: 3.7-4.2 V); Temperature - temperature (optimally: 20-40°C).

Unfortunately, the standard Redmi Note 7 engineering menu doesn’t show the current battery capacity in mAh. This will require a different method (see Section 3), but you can see if the battery is overheating during charging – this is one of the first signs of wear and tear.

2. USSD codes for rapid diagnosis

If the engineering menu seems complicated, use it. USSD-They work on all Xiaomi smartphones and provide basic information about the battery, and the main advantage is that you don't need to install additional applications.

Enter the following combinations in the Phone application:

• 🔢 ##6484## - Battery test (shows voltage, temperature and charging state).
• 🔢 ##64663## - Extended information about battery and charger.
• 🔢 ##44336## - Battery status log (useful for analysis by a specialist).

Once you enter the code, you'll see the technical data.

• 🔋 Battery health – if Good is indicated, battery is normal; Replace soon or Poor means critical wear and tear.
• ⚡ Charging status – must be Charging (if the phone is connected to charging) or Discharging.
• 🌡️ Battery temp - temperature above 45°C when charging signals problems.

💡

If, after input, USSD-If you don't have a code, try adding an asterisk at the end (e.g. ##6484## instead of ##6484.

3. Applications for detailed battery analysis

To get the most accurate data (including the actual capacity per mAh and the number of charging cycles) you will need third-party utilities. We tested the 3 best applications compatible with the Redmi Note 7:

How to use AccuBattery (the most accurate option):

1. Install the app and allow access to battery statistics.
2. Fully charge your phone to 100% (preferably the original charger).
3. Turn off charging and use your smartphone until it discharges to 15-20%.
4. In the Health section, you will see the actual battery capacity in mAh and the percentage of wear and tear.

Charge up to 100% with the original adapter |Disable background applications |Use before discharging below 20% |Test replay 2-3 times for accuracy-->

Example: If Redmi Note 7 It originally had a battery on 4000 MAh, and AccuBattery shows 3200 mach, wear is (4000 - 3200) / 4000 × 100% = 20%. This means that the battery has lost a fifth of its capacity.

4.Analysis through ADB (for advanced users)

If you're willing to use the command line, the ADB method will give you the most detailed data, and it's Google's official tool that lets you access hidden system settings.

Instructions:

1. Download and install ADB Tools on your computer.
2. Turn on USB Debugging on your phone: Go to Settings → About Phone. Tap 7 times on MIUI to activate Developer Mode. Go back to Settings → Additional → For Developers and enable USB Debugging.

adb shell


dumpsys battery

In conclusion, note:

• 📋 level - current charge;
• ⚡ voltage;
• 🔄 charge counter - current capacity in mkAh (divided by 1000 to get mAh);
• 🌡️ Temperature: Temperature in tenths of a degree (e.g, 345 = 34.5°C).

This method is suitable for those who want to get the most accurate data without installing third-party applications, but it requires command line skills.

5.Visual signs of battery wear

Even without special tools, you can suspect problems with the battery for indirect reasons.

• 🔋 The phone turns off when 20-30% charge (real capacity below the displayed capacity).
• ⚡ The battery is charging too fast (for the first time). 1-1.5 hourly 100%) — It's a sign of loss of capacity.
• 🌡️ The phone’s body gets very hot during charging or gaming.
• 📉 Battery life has been reduced in 1.5-2 compared to the new phone.
• 🔌 Charging jumps (for example, from 80% immediately to 100% or back).

If you see at least 2-3 of these signs, the Redmi Note 7 battery is probably worn out.

• 🔧 Check the actual capacity with one of the methods above.
• 🔄 Try calibrating the battery (discharge to 0% and charge to 100% without interruptions).
• 🛠️ Contact the service center for battery replacement (cost for Redmi Note 7 – about 1500-2500 rubles).

💡

If the phone suddenly turns off at 20-30% charge, it almost always means that the actual battery capacity is below 70% of the nominal, in which case replacement is the only solution.

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

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

• 🔌 Avoid deep discharge (below 10%) and recharge (above 90%.
• 🌡️ Do not use your phone in extreme temperatures (below 0)°C or higher than 40°C).
• ⚡ Charge with the original adapter (or certified with Quick Charge 3.0 support).
• 📵 Turn off Wi-Fi, Bluetooth and GPS, when they're not needed.
• 🔄 Regularly (once in) 2-3 month) perform battery calibration.

It is also useful to turn off the background activity of unnecessary applications:

1. Go to Settings → Applications → Permissions → Autorun.
2. Turn off auto-start for applications that you rarely use.
3. In the Settings → Battery → Power saving mode, turn on optimization.

Following these tips, you can extend the battery life by 20-30% and delay its replacement.

💡

If you play heavy games often, use MIUI Game Mode, which limits background processes and reduces battery heat.

FAQ: Frequent questions about the Redmi Note battery 7

⚠️ Warning: If the Redmi Note 7 battery is swelling (the phone's body is deformed), stop using it immediately. The bloated battery may cause a fire.

⚠️ Note: When replacing the battery, use only the original part with the article MBJ406631 (Cheap analogues may not match the voltage and capacity parameters, which will lead to rapid wear or damage to the phone.