How to know exactly the battery status on Xiaomi Redmi 8 Pro: step-by-step methods with the decoding of indicators

The battery is one of the most vulnerable components of the Xiaomi Redmi 8 Pro, which loses capacity over time and discharges faster. If your device starts to hold a charge worse than a year ago, or suddenly turns off at 20-30% charge, these are sure signs of battery wear. But how exactly to determine its condition without disassembling the device?

In this article, we'll look at all the diagnostic tools available, from built-in MIUI tools to engineering codes and third-party applications, how to decipher battery health, what are the normal values for the Redmi 8 Pro, and what to do if wear is above the critical mark, all methods tested on current firmware versions and do not require root rights.

1. Check through the standard MIUI menu

The easiest way is to use the built-in MIUI tools, which give you basic information about the battery, but they don't show you the wear and tear.

1. Open Settings → Battery and Performance.
2. Tapping the icon “Battery Status” (or “Battery Use” in older versions).
3. Scroll down to the Battery Health Block.

Here you'll see the percentage of wear (e.g., "Good: 92%"). However, this is often rounded up and may not reflect the real picture. For example, if the system shows 85%, the actual wear could be 83% or 87%.

💡

If you don’t have Battery Health on your menu, upgrade your MIUI to the latest version or use alternative methods from this article.

In the same section, pay attention to the charge flow schedule: If the smartphone is running at more than 1% per hour in standby mode (with Wi-Fi and mobile data turned off), this may indicate software errors or hardware problems with the battery.

2. Engineering menu: hidden data about the battery

The engineering menu (#4636##) provides advanced battery information, including temperature, voltage and charge level. For the Redmi 8 Pro, this method works without root rights, but requires caution - do not change other settings on the menu!

Instructions:

1. Open the phone app and enter the combination: ##4636##
2. Select the item "Battery Information".
3. Pay attention to the following parameters: 🔋 Level - current charge in percentage. 🌡️ Temperature - battery temperature (normal: 25-40)°C). ⚡ Voltage - voltage (normal for Redmi 8 Pro: 3.7–4.4V). 🔄 Health - battery health (displayed as good if wear is minimal).

If the Health setting shows unknown or missing, your version of MIUI is blocking access to this information, in which case use third-party applications (section 4).

3. USSD codes for battery diagnostics

The Xiaomi Redmi 8 Pro runs several service codes that output technical information about the battery, which do not require Internet and work even offline.

After entering the code, you will see technical data where the key parameters are:

• 🔢 Cycle – the number of full charging cycles (normal up to 500).
• 📉 Health - percent of wear (below 80% - critical).
• ⚡ Voltage - if below 3.5V At 100% charge, the battery needs to be replaced.

⚠️ Note: Not all codes work on custom firmware. If nothing happens after you enter the combination, try another method.

4. Third-party applications for deep diagnostics

If the built-in tools don’t give the full picture, use specialized utilities. For Redmi 8 Pro, you can:

• 📊 AccuBattery - shows the real capacity, wear and history of charging cycles. Plus: runs without root, minus: requires calibration (2-3 charging cycles).
• 🔍 CPU-Z — Battery displays temperature, voltage and battery technology (Li-Po for Redmi 8 Pro).
• 🛠️ AIDA64 — It provides the most detailed information, including the factory capacity (4500 mAh for the Redmi 8 Pro) and the current.

Example of data decryption from AccuBattery:

• Design capacity – factory capacity (4500 mAh).
• Estimated capacity is the current capacity (e.g. 3800 mAh = 15% wear).
• Health percentage (below 70% – battery to be replaced)

Charge your smartphone to 100% |Distribute to 15% without recharging |Repeat cycle 2-3 times |Run capacity test in the application-->

Important: applications like AccuBattery produce more accurate results after calibration, the full discharge-charging cycle, without which the error can be as high as 10-15%.

5. Physical signs of battery wear

Even without diagnosis, you can suspect a battery problem by indirect signs.

• 🔥 Overheating – if the body is heated above 45°C when charging or working in plain.
• 📵 Sudden shutdowns – for example, at 30% charge (indicates nonlinear wear).
• ⚡ Slow charging – if 0 to 100% charge for more than 3 hours (with a serviceable power supply).
• 📏 Battery bloating – if the screen or back cover starts to curve.

If you notice bloating, stop using your smartphone immediately, which is dangerous to your health! The battery can ignite or explode, and you need to replace the battery at the service center.

⚠️ Warning: Do not try to open the Redmi 8 Pro yourself, this will lead to loss of warranty (if it is still valid) and risk of damage to the board. Use official Xiaomi service centers or proven workshops to replace the battery.

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

Even if the battery wear has already reached 15-20%, you can slow its progression.

• 🔌 Avoid full discharge – charge your phone at 15-20% charge.
• ☀️ Don’t leave it in the sun – overheating to 50°C reduces service life by 30%.
• 🔋 Use the original power supply – unoriginal charges can damage the battery controller.
• 📵 Turn off background processes – apps like Facebook or TikTok consume power even in standby mode.

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 interruption.
3. Keep charging for another 1-2 hours after reaching 100%.

💡

The optimal charge range for battery life is 20-80%, and constant charging up to 100% reduces the lifespan by 20-30%.

FAQ: Frequent questions about the Redmi battery 8 Pro