Xiaomi Redmi Note 6 Pro
4,000 mAh
5 Proven Methods
ADB
Many users mistakenly believe that it is enough to look at the percentage of charge in the status bar, in fact, the real wear of the battery is hidden from view: it depends on the number of charging cycles, temperature conditions and even the firmware version, we will tell you how to get accurate data on the capacity, voltage and health of the battery, and give tips on how to extend its life.
Important: Some methods require unlocking the bootloader or root rights, and if you're not prepared for this manipulation, use the safe alternatives in the first three sections.
1. MIUI Standard Tools: What the System Shows
The manufacturer hides detailed information about the battery, but MIUI has basic tools to assess its condition, which will not give accurate wear figures, but will help to notice anomalies.
Open the settings → Battery. Here you will see:
- 📊 Consumption schedule for the last 24 hours (peak loads may indicate battery failure).
- ⚡ List of applications that consume charge (if system processes like Android System are in the top).
- 🔄 Screen time (compare with past periods: if it is drastically reduced, the battery degrades).
Note the Battery Status section (not available in all MIUI versions) if it says "Good" or "Normal" - there is no cause for concern. But the absence of this option does not mean that the battery is fine: in MIUI 10 and below, this section is often missing even when the battery is critically worn.
⚠️ Note: If you see a message in the Battery section saying “Replacement is recommended”, it means that the capacity has fallen below. 60-70% In this case, further diagnosis is meaningless - the battery needs to be changed.
2. Hidden engineering menu: codes for diagnosis
The Redmi Note 6 Pro has a hidden menu with detailed battery information. To get there, open the Phone app and type in the combination:
##4636##After that, select Battery Information and the key parameters will be displayed here:
- 🔋 Charge level (in percent and millivolts).
- 🌡️ Temperature (normal: 25-40)°C; if above 45;°C - battery overheats).
- 📏 Voltage (optimum: 3.7-4.2 V; below 3.5 V - critical discharge).
- 🔄 Charging technology (should be) fast_charge, if maintained).
If the menu doesn’t open, try the alternative code:
##6484##It outputs the MTK Engineer Mode test (which runs on MediaTek processors, but the Redmi Note 6 Pro is equipped with Qualcomm Snapdragon 636, so this code may not work).
⚠️ Warning: Do not change the settings in the engineering menu unless you understand their meaning! Incorrect settings can lead to loss of warranty or even battery fire.
What do I do if the codes don't work?
3. Diagnostic applications: AccuBattery and AIDA64
The side of the utility provides more data than the standard tools, and we recommend two proven applications:
1. AccuBattery (free, with premium options)
- 📉 Shows the real capacity of the battery (compared to the passport).
- 🔄 Tracks charging cycles (critical threshold - 500 cycles).
- ⚡ Analyzes the discharge rate in standby and under load.
- 🛡️ Gives recommendations for optimal charging (for example, do not hold 100% for long).
2. AIDA64 (paid trial version)
- 📋 Shows an accurate model of the battery (for example, BD40 The original Redmi Note 6 Pro battery).
How to use:
- Install the app from Google Play.
- Start and wait for the data collection (it can take 10-15 minutes).
- In AccuBattery, go to the Health tab, in AIDA64 – to the Battery section.
Charge your phone to 100% |Discharge to 20% without recharging |Repeat cycle 2-3 times for accurate data |Do not use your phone during the test-->
4. ADB-Teams: Data for Advanced Users
If you want the most accurate data, use ADB (Android Debug Bridge), a method that requires a PC and minimal command line skills.
Steps:
- Download ADB Tools and unpack it into a folder.
- Turn on USB debugging on your phone: Settings → About Phone → MIUI version (click 7 times until you say “You’re a developer”). Then go back to Settings → Additional → Developers → Debugging on USB.
- Connect your phone to your PC and type in the command line: adb shell dumpsys battery
In the answer, find the lines:
- health - state (2 = good, 3 = overheating, 4 = dead battery).
- Capacity is the current capacity as a percentage of nominal capacity.
- Voltage is the voltage in microvolts (divided by 1000 for volts).
- Technology is a type of battery (should be Li-ion or LiPo).
Example of conclusion:
health: 2
level: 85
scale: 100
Voltage: 3847000 (3.847 V)
temperature: 290 (29°C)
technology: Li-ion⚠️ Note: If the health setting is 7, it means that the battery controller is not responding, in which case the smartphone can suddenly turn off even at 30-40% charge.
💡
If ADB Does not recognize the device, update Qualcomm drivers or try another USB-Often the problem is with the unoriginal cables with the damaged data contacts.
5.Physical diagnosis: When the battery swells
Sometimes the battery problem is visible to the naked eye, and battery bloating is a dangerous symptom that needs immediate replacement.
Signs of bloating:
- 📱 The screen or back cover has risen (especially noticeable if you put the phone on a flat surface and sway).
- 🔊 The body creaks when you press the side buttons.
- 🔌 Charging is interrupted for no apparent reason (the bloated battery presses on the connector).
- 📉 Phone turns off at 20-30% charge (battery contacts are gone).
What to do:
- Do not try to puncture or compress the battery – this can cause a fire.
If you decide to replace the battery yourself, buy the original (code MBJ4056 or BD40) or certified analogue from ZMI or Baseus. Avoid cheap Chinese fakes - they may not match the declared capacity.
| Symptoms. | Probable cause | Decision |
|---|---|---|
| The phone is turned off at 15-30% | Battery wear or controller failure | Calibration or substitution |
| Fast discharge at low temperatures | Degradation of lithium-ion elements | Use a heated cover |
| The swelling is in progress (it stops and goes) | Battery bloating or connector damage | Diagnostics in the service |
| Phone warms up when charging | Failure of the battery or charger | Checking charging and batteries |
💡
If the battery is swollen, it can't even be used for temporary use, and lithium-ion batteries in this state are prone to spontaneous combustion, especially when charging.
Battery calibration: when data is lost
Sometimes the problem is not wear, but incorrect readings of the controller, for example, the phone shows 100% charge, but turns off after 10 minutes, in which case calibration will help.
How to Calibrate the Battery on Redmi Note 6 Pro:
- Discharge the phone until it is completely turned off (0%).
- Connect to the original charger and charge for at least 8 hours without interruption.
- Turn off the charging, turn on the phone and wait for the full load.
- Repeat the discharge / charge cycle 1-2 times.
If calibration doesn’t work, reset your settings through Settings → Additional → Reset → Reset battery settings. This will remove usage statistics and the system will re-evaluate capacity.
⚠️ Attention: Calibration won't restore the capacity of the worn-out battery! It only corrects the error of charge accounting. If after calibration the phone still runs out in 2-3 hours, the battery needs to be changed.
7 How to extend the life of the battery: 5 practical tips
Even if the battery is still in good condition, follow these guidelines to delay replacement:
- 🔌 Avoid deep discharge (connect charging at 15-20%).
- ⚡ Do not keep your phone on charge for longer than 1-2 hours after 100% (especially at night).
- 🌡️ Do not use your phone in extreme temperatures (below 0)°C or higher than 40°C).
- 📵 Turn off mobile data, Wi-Fi and Bluetooth when they are not needed.
- 🔄 Once every 3 months, perform a full discharge/charging cycle for calibration.
Also, turn off autobrightness and set it to 50-60% manually, which will reduce charge consumption by 10-15%. In the developer settings (Settings → Additional → For developers), activate the option Do not turn off the screen while charging if you often use your phone while recharging.
💡
Use dark themes and AMOLED-optimized wallpaper (black does not light up on the screen, saving charge).