How to check the battery status on Xiaomi Redmi Note 8 Pro: the complete guide

Xiaomi Redmi Note 8 Pro with its powerful Mediatek Helio G90T processor and capacious 4500 mAh battery has been popular among users for several years. However, over time, even the best-quality battery loses capacity: the phone begins to run out faster, overheat or suddenly shut down at 20-30% charge. If you notice these symptoms, it’s time to check the status of the battery.

In this article, we’ll look at 5 reliable ways to diagnose a battery on the Redmi Note 8 Pro, from hidden engineering menus to specialized applications, how to interpret mV, mAh and temperature, and what to do if the battery is worn out. All methods are tested on MIUI 12-14 firmware and do not require root rights.

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

The fastest way to assess battery health is to use a hidden engineering menu, which is available on all Xiaomi smartphones without installing additional software, and Importantly, on some firmware, this menu may be blocked, in which case move to the next method.

Instructions:

  • 📱 Open the phone app and enter the combination: ##4636##
  • 🔧 In the menu that appears, select Battery Information).
  • 📊 Note the following parameters: Level - current percentage in numbers (may differ from the one displayed on the screen); Voltage - the norm for the Redmi Note 8 Pro at 100%: 4.35-4.40 V. Temperature - optimal 25-35°C. Exceeding 40°C says overheating. Technology -- it's got to be Li-ion or Li-poly.

⚠️ Note: If the voltage at 100% charge is below 4.20 V, it is a sign of severe battery wear. Also alarm is the difference between Level and the displayed percentage is more than 10% (for example, in the menu 85%, and on the screen 95%).

The level of charge (level) coincides with the screen|Voltage (Voltage) within the limits 4.20–4.40 V|Temperature (temperature) not higher 40°C|Battery technology — Li-ion/Li-poly

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2.Use of USSD-code ##6484## (MTK Battery Test)

Redmi Note 8 Pro is built on the platform Mediatek, so it is available for a unique battery test through the MTK-This method provides more detailed information than the standard engineering menu, including real capacity in milliamp hours (mAh).

How to run the test:

  1. Open the phone app and type in: ##6484###
  2. From the MBAT TEST menu, select Battery Info.
  3. Note the lines: Battery Capacity – current capacity in mAh (compare with passports) 4500 Battery Health - Battery health percentage (below) 80% — critically). Charge/Discharge Current - charge/discharge current (normal when charging: 1500–2000 mA).

If the Battery Capacity is below 3,500 mAh, the battery needs to be replaced — it wears more than 20%. Also, look at the Cycle Count. For the Redmi Note 8 Pro, the battery life is 500-800 cycles, and exceeding this value leads to a sharp decrease in capacity.

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If the ##6484## code doesn't work, try typing it without the last star: ##6484#*#.

3. Diagnostic applications: AccuBattery and AIDA64

If standard methods don't give you the full picture, use third-party utilities. Two of the most reliable applications for the Xiaomi Redmi Note 8 Pro are AccuBattery and AIDA64, which analyze battery wear, discharge rate, and even predict the remaining life.

AccuBattery (Free on Google Play):

  • 📊 Shows the real battery capacity and percentage of wear.
  • 🔋 Tracks charging cycles and temperature.
  • ⚡ Provides recommendations for optimal charging (e.g. avoiding recharging above 80%).

AIDA64 (paid version with trial period):

  • 🛠️ Detailed information on voltage, current and battery technology.
  • 📅 History of battery use in the last day / week.
  • 🔍 Checking the power controller (useful if hardware malfunctions are suspected).

⚠️ Warning: Once you install AccuBattery, you need 2-3 full charge/discharge cycles to collect accurate data. Don’t delete the app immediately after you first start it up, wait for it to analyze the battery behavior.

AccuBattery|AIDA64|Other |Not using apps

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4.Analysis through ADB (for advanced users)

If you're ready to work with the command line, the ADB method will provide the most accurate data, which is useful if the standard methods show conflicting results or the battery behaves unstable (for example, the phone turns off at 30% charge).

Instructions:

  1. Install ADB Tools on your PC.
  2. Turn on USB Debugging on your phone: Settings → About Phone → MIUI version (click 7 times to activate Developer Mode), then Settings → Additional → Developers → Debugging over USB.
  3. Connect the Redmi Note 8 Pro to your computer and type in the command line: adb shell dumpsys battery
  4. Look for the following parameters in the conclusion: level - current charge in percent. voltage - voltage in microvolts (divided by 1000 for volts). temperature - temperature in tenths of a degree (for example, 320 = 32.0 ° C). health - battery condition (2 = good, 3 = bad).

Example of output for a healthy battery:

level: 85




voltage: 4120 (4.12 V)




temperature: 310 (31.0°C)




health: 2 (GOOD)

⚠️ Note: If health shows a value 3 (DEAD), 4 (OVERVOLTAGE) or 5 (UNSPECIFIED_FAILURE), The battery is defective and needs to be replaced. 100% charge 4.0 V.

What if the ADB does not recognize the device?
If the adb device command doesn’t show your Redmi Note 8 Pro, follow the following steps: 1. Install Mediatek drivers VCOM (You can download it from Xiaomi. 2. Reconnect your phone in Transfer Files mode (MTP). 3. Enter in ADB: adb kill-server adb start-server 4. If the problem persists, try another one. USB-cable (preferably original).

5. Visual diagnosis and physical examination

Sometimes the battery problem is visible to the naked eye, and if the Redmi Note 8 Pro gets hotter, the body is swollen, or the phone turns off on its own, you need to physically inspect the battery, especially if the smartphone is falling or exposed to moisture.

Signs of a faulty battery:

  • 🔥 Overheating even with minimal load (for example, in standby mode).
  • 📏 Bloating of the body - check whether the phone is flat on the table (swings - a sign of bloating).
  • ⚡ Sharp charge jumps (for example, from 50% to 1% in a few minutes).
  • 💧 Corrosion traces on the charging port contacts or under the cover.

⚠️ Warning: If the battery is swelling, you can't keep using the phone! This is dangerous: the risk of fire or battery rupture when charging.

For self-checking:

  1. Turn off your phone and remove the back cover (if it’s removable; the Redmi Note 8 Pro will require a plastic spatula and a hair dryer to soften the glue).
  2. Check the battery for: Bloated areas (normal battery is flat), swelling or white plaque (sign of electrolyte leakage), contact damage.

battery-line

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A bloated battery is not only a loss of capacity, but a real fire hazard. Don't risk it: replace the battery at a certified service center.

6. Comparison with regulatory indicators for the Redmi Note 8 Pro

To objectively assess the battery status, compare the data with the reference values for the Redmi Note 8 Pro. Below is a table of key parameters for the new and worn battery:

ParameterNew batteryWorn-out batteryCritical condition
Capacity (mAh)4300–45003500–4000< 3000
Voltage at 100% (V)4.35–4.404.20–4.30< 4.00
Temperature in simple (°C)25–3535–45> 50
Operating time (screen 50% brightness)6-8 hours3-5 hours< 2 hours
Number of charging cycles< 300300–500> 800

If your readings are closer to the Critical State column, the battery needs to be replaced. Note that even at 3,500 to 4,000 mAh, you may experience sudden shutdowns, as the Redmi Note 8 Pro power controller is programmed to shut down when the voltage drops below 3.2 V.

Tip: If the battery capacity has dropped to 70-80% of the original, but the phone still holds a charge, try calibration:

  1. Charge your phone to 100% and hold on charging for another 1 hour.
  2. Turn off the charge and discharge to 0% (until it turns off).
  3. Repeat the cycle 2-3 times.

This may temporarily improve performance, but it will not return the original capacity.

Frequent questions about the Redmi Note 8 Pro battery

🔋 How much is the battery Redmi Note 8 Pro?
In normal operation (1 charging cycle per day), the battery retains 80% of capacity for 2-3 years. After 500-800 cycles, wear becomes noticeable: the operating time is reduced by 30-50%. Active use of resource-intensive games (for example, Genshin Impact or Call of Duty Mobile) accelerates degradation.
📉 Why your phone is running out at 20% per night?
Nighttime charge consumption of more than 5-10% is a sign of background application activity or battery problems: 🛑 Settings → Battery → Battery usage (find high-flow apps). 🔄 Turn off auto-update apps and background sync. 📡 Turn off your mobile data or Wi-Fi at night. If the consumption remains high, the battery is worn out.
🔌 Can I use the charging on the 33W For the Redmi Note 8 Pro?
The Redmi Note 8 Pro supports fast 18W charging. A 33W charger (such as the Xiaomi Mi 10) won’t hurt the phone, as the power controller will limit current to safe values. However, the constant use of more powerful RAMs can accelerate battery wear due to increased heat generation.
🔄 How to Reset Battery Statistics After Replacing?
After installing the new battery, it is recommended to reset the calibration data: Charge the phone to 100%. Enter the Battery reset command (if available) in the engineering menu (#4636##). Or use ADB: adb shell dumpsys batterystats --reset This will help the system display the charge level correctly.
💰 How much does it cost to replace the battery on the Redmi Note 8 Pro?
Cost of replacement in 2026: 🛠️ Original battery (with warranty): 1500-2500 ₽. 🔧 High quality analogue: 800–1200 ₽. ⚠️ Low-quality analogue: 500-800 ₽ (We recommend contacting authorized Xiaomi service centers – they use original components and give a warranty of up to 6 months.