How to accurately check the battery status on Xiaomi Redmi Note 8 Pro in 2026

Why it’s important to monitor the health of the Redmi Note 8 Pro battery

The Xiaomi Redmi Note 8 Pro battery is one of the most vulnerable components of the smartphone, which degrades even when used properly. After 2-3 years of active use, battery capacity can decrease by 30-40%, leading to sudden shutdowns, slow charging and overheating.

In this article, you will find 5 proven ways to diagnose a battery, from hidden engineering menus to professional applications, and we will also look at what capacity is considered critical for battery replacement in 2026 (spoiler: If the capacity has fallen below 70%, the risk of sudden shutdown increases by 3 times. 18W.

Warn in advance: some methods require unlocking the bootloader or root rights, and if you are not prepared for such manipulation, use the safe alternatives in the first three sections.

Method 1: Secret code for rapid diagnosis (#4636##)

The easiest way to test the basic battery settings is to use the Android Engineering Menu, which requires no additional apps and works on any Redmi Note 8 Pro regardless of the MIUI version.

Instructions:

1. Open the Phone app.
2. Enter the combination: ##4636###.
3. In the menu that appears, select Battery Information.

In this section you will see:

• 🔋 Charge level (in percent and millivolts)
• 🌡️ Battery temperature (normal: 25–40)°C)
• ⚡ Voltage (optimum: 3.7–4.2V)
• 📊 The state (should be "good" or "good")

Charge level above 15% |Temperature below 45°C|Voltage in the range of 3.7-4.4V|State "Good" or "Good"

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Method limitation: The engineering menu does not show the actual battery capacity in mAh, but only the current parameters.

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If the menu does not open after entering the code, check if it is blocked by antivirus or MIUI Optimization in the developer settings.

Method 2: Applications for detailed analysis (AccuBattery, CPU-Z)

Specialized utilities allow you to track battery wear, charging cycles and even predict the remaining life. For the Redmi Note 8 Pro, we recommend two proven applications:

AccuBattery (Free version with limitations)

This app analyzes the actual battery capacity by comparing it to the factory (4500 mAh for the Redmi Note 8 Pro). After 2-3 full charge/discharge cycles, AccuBattery will show:

• 📉 Health score (e.g., "85% of original capacity")
• 🔄 Number of charging cycles (critical after 500 cycles)
• ⏱️ Autonomous life under different use scenarios

CPU-Z (Battery section)

A lesser-known but useful feature of CPU-Z is mapping the current consumption current in mA. This helps identify programs that drain the battery in the background. For example, if a smartphone consumes >300 mA in standby mode, this is a sign of a software trainer (most often Facebook, MIUI Analytics or unoptimized games are to blame).

AccuBattery|CPU-Z|Standard settings MIUI|Other |Not monitoring the battery

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One important caveat: applications take 2-3 days to collect accurate data. Don't jump to conclusions after the first run!

Method 3: Testing through ADB (for advanced users)

If you are ready to connect the Redmi Note 8 Pro to your computer, ADB-The team will give you the most accurate data on the battery:

• 🖥️ Computer with ADB-drivers installed
• 🔌 USB-cable (preferably original)
• 📱 Initiated Debugging Mode USB developer-setting

Instructions:

1. Connect your smartphone to your PC and open Command Prompt (Windows) or Terminal (macOS/Linux).
2. Enter the command to check the status of the battery: adb shell dumpsy battery
3. Look for lines: level: 75 # current charge in % temperature: 320 # temperature in tenths of °C (320 = 32 °C) voltage: 4023 # voltage in millivolts (4023 = 4.023V) health: 2 # state (2 = "Good")

Decoding the health parameter:

• 2 - battery in good condition
• 3 - overheating
• 4 - hypothermia
• 5 - voltage above normal
• 6 - Unknown error (requires diagnosis)
• 7 - Critical wear (replacement required)

Warning: If the health setting is 7, the battery is in a state of disrepair, and the use of such a battery can cause swelling or fire.

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ADB-The method is the most accurate, but it requires technical skills. If you are not sure about your actions, use the applications from Method 2.

Method 4: Visual signs of battery wear

Even without special tools, you can suspect problems with the battery Redmi Note 8 Pro for indirect reasons.

• 🔥 Overheating during charging or heavy use (norm: up to 40)°C, critically: >50°C)
• ⚡ Fast discharge (e.g., from 100% to 0% in 4-5 hours without loading)
• 🔌 Slow charging (longer than 2.5 hours from 0% to 100% when using origil RAM)
• 💥 Bloating (check if the screen or back cover is moving away)
• ⚠️ Sudden shutdowns at 20–30% charge (sign of calibration or wear)

Bloating test:

1. Put the smartphone on a flat surface with the screen up.
2. Easy press the center of the back cover.
3. If the body is "playing" or a crunch is heard - the battery is swelled.

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To check the temperature without apps, use the tactile method: if the case is hot (not warm, but hot), immediately turn off charging and let the smartphone cool down.

What to do when you're bloating:

⚠️ Warning: A bloated battery is a ticking time bomb. Don't try to prick it or keep using it! Contact a Xiaomi service center or specialist workshop. Storing such a device near flammable objects (such as on a couch or in a car) is dangerous.

Method 5: Calibration of the battery (if the smartphone is turned off by 20-30%)

Sometimes the problem isn't physical wear, but incorrect calibration of the charge controller, which causes the Redmi Note 8 Pro to show 30% charge and then suddenly shut down.

Instructions:

1. Discharge the smartphone before automatically shutting down.
2. Connect the original charger and don’t turn on the phone.
3. Charge for at least 8 hours (even if the indicator is 100%).
4. Turn off charging, turn on your smartphone and wait for the system to fully load.
5. Repeat the discharge / charging 2 more times.

Important: calibration only helps with software failures, not physical wear, and if the problem persists after the procedure, the battery needs to be changed.

Signs that calibration will not help:

• 📉 Capacity on AccuBattery below 60%
• 🔋 Bloating of the body (visually or tactilely)
• ⚡ The smartphone does not hold a charge longer than 2-3 hours

When to change the battery: the criteria for 2026

The manufacturer claims that the Redmi Note 8 Pro battery is designed for 500 full charge cycles, but the real life depends on:

• 🔌 Type of charging (fast charging) 18W It wears out the battery faster than the standard battery)
• 🌡️ Temperature (operational with the >40°C reduces battery life by 30%)
• 📵 Depth of discharge (permanent discharges up to 0% are more harmful than 20-80 recharges%)

Battery replacement should be considered at the following indicators:

The cost of replacement in 2026:

• 🛠️ Official Xiaomi service: 3,500–5,000 ₽ (6-month warranty)
• 📦 Self-substitution: 1,500–2,500 ₽ (only if there is experience!

⚠️ Warning: When replacing a battery in informal services, require a certificate for the battery (< 1 500 ₽) often have a capacity of 3000-3500 mAh instead of the declared 4500 mAh and can swell in 2-3 months.

FAQ: Frequent questions about the Redmi Note battery 8 Pro