How to check the battery status of Xiaomi Redmi Note 8 Pro

Xiaomi Redmi Note 8 Pro is one of the most popular smartphones of 2019, but even its capacious 4500 mAh battery loses capacity over time. If the phone becomes faster to discharge, overheat or suddenly shut down at 20-30% charge, it’s time to check the battery status. In this article, we will analyze all the working methods of diagnosing the battery, including hidden engineering menus, third-party applications and hardware tests.

It's important to understand that the Redmi Note 8 Pro uses a lithium polymer battery that degrades even when properly operated. After 300 to 500 full charge cycles, the capacity can drop by 20 to 30 percent, and we'll show you how to measure battery wear more accurately without disassembling the phone, and we'll give you recommendations for extending its life.

1. Check through the engineering menu (no root)

The most reliable way to know the actual status of the battery is to go to the hidden engineering menu, which is available on all Xiaomi smartphones without the need for root permissions.

1. Open the Phone app.
2. Enter the combination: ##4636###.
3. Select the Battery Information item.

In the window that opens, pay attention to the following parameters:

• 🔋 Charge level – current percentage in digital form (may differ from the indicator in the statusbar).
• 📊 Battery health - shows wear and tear as a percentage (e.g. 92% means a loss of 8% capacity).
• 🌡️ Temperature - normal values: 25-40°C on charging, 20-35°C to the plain.
• ⚡ Voltage - should be in the range of 3.7-4.2 V at 100% charge.

⚠️ Note: If Battery Health is not available, your version MIUI In this case, use alternative methods from the following sections.

2. Use of secretive USSD-code

There are several service codes for the Redmi Note 8 Pro that output technical battery information, and these codes run on most MIUI firmware, including the global and Chinese versions.

After entering the code ##6484## You'll see a window with a parameter. MB_XX — This is the actual capacity of the battery in milliamp hours. Compare it to the passport capacity (4500 For example, if it is displayed MB_40, means 4000 mAh (wear and tear) ~11%).

⚠️ Note: #44336## may not work on new versions MIUI or cause a reset. Use it only if you are sure of firmware stability.

3. Applications for battery diagnostics

If the engineering menu doesn't give you the full picture, installing specialized applications will help you get a detailed report.-3 Checked utility for Redmi Note 8 Pro:

• 📱 AccuBattery analyzes charging cycles, shows real capacity and wear. The free version limits the history of data.
• 🔍 CPU-Z — Battery displays voltage, temperature and charge level in real time.
• 🛠️ AIDA64 — Provides the most detailed information, including the number of charging cycles).

For accurate testing with AccuBattery:

Charge the phone to 100%|Turn off charging and use up to 20%|Repeat the cycle 2-3 times for calibration|Check the Health section to assess wear-->

After 3-5 cycles of charging / discharging, the application will show a graph of battery degradation, for example, if the original capacity was 4500 mAh and the current one was 3800 mAh, the wear is ~15%.

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If AccuBattery shows abnormally low capacity (e.g., 2,000 mAh at 50% charge), try resetting the battery statistics in the app settings and recalibrate.

4.Analysis through ADB (for advanced users)

If you're familiar with the command line, you can get battery data through Android Debug Bridge (ADB), which gives you the most accurate metrics, including the number of charging cycles and the actual voltage.

Instructions:

1. Install ADB Tools on your PC.
2. Enable USB Debugging in the developer settings (Settings → About Phone → MIUI version – press 7 times).
3. Connect the Redmi Note 8 Pro to your computer and execute the command:

adb shell dumpsys battery

In conclusion, find the following parameters:

• Health: 2 - Battery status (2 = good, 3 = needs replacement).
• Voltage: 4120 – voltage in millivolts (4.12 V).
• temperature: 290 - temperature in tenths of a degree (29.0 ° C).
• charge_counter: 3800000 — flow-capacity in microamper hours (3800 mAhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh).

⚠️ Warning: If the health parameter is 5 or 7, the battery is critically worn out and may cause sudden shutdowns or overheating.

5.Visual signs of battery wear

Even without special tools, you can suspect problems with the battery on indirect grounds.

• 🔥 Overheating – if the body is heated above 40°C when charging or working in plain.
• ⚡ Sudden shutdowns – the phone turns off at 20–30% charge, although the indicator shows a normal level.
• 🐢 Slow charging – from 0 to 100% in 3+ One hour of using the original scoring.
• 📉 Fast discharge – loss of 20-30% charge in 1 hour in standby mode.
• 💥 Battery bloating – if the screen or back cover has started to “step away” from the body.

If you notice bloating, stop using your phone immediately. Lithium polymer batteries in this state can ignite. Replace the battery at the service center.

6 How to extend the life of the Redmi Note 8 Pro battery

Even if the battery is still in good condition, following simple rules will help delay its degradation:

• 🔌 Charging – Use an original or certified RAM (18W Avoid cheap cables for fast charging.
• 🌡️ Temperature - Do not leave your phone in the sun or near heat sources. Optimal range: 10-35°C.
• 🔄 Charging cycles – try not to discharge below 20% or charge above 80% for everyday use.
• 📵 Storage – If you don’t use your phone for long, leave the charge at 40-60% and turn it off.
• 🔧 Optimization – Turn off background activity of unnecessary apps in Settings → Battery → Optimization.

It is also useful to calibrate the battery once every 2-3 months:

1. Discharge the phone before automatically shutting down.
2. Charge to 100% without interruptions (use the original RAM).
3. Keep charging for another 1-2 hours after reaching 100%.

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Regular calibration helps to reset the power controller errors, but does not restore a physically worn-out battery.

FAQ: Frequent questions about the Redmi Note battery 8 Pro