Xiaomi Redmi Note 8 Pro: How many milliamp-hours (mAh) in the battery really?

Xiaomi Redmi Note 8 Pro is still one of the most popular smartphones in the budget segment, despite the release of newer models. Owners of this device often wonder: how many milliamp-hours (mAh) in the battery and how it affects the time of operation? In the official specifications, the manufacturer indicates one digit, but real tests and user experience can give different results.

In this article, we will not only look at the rated capacity of the battery, but also how it changes over time, what factors reduce battery life, and what to do if the smartphone starts to run out too quickly, you will also learn how to independently check the current capacity in mAh without disassembling the device and what errors when charging the Redmi Note 8 Pro make 90% of users.

How many mAh is claimed in the Redmi Note 8 Pro

According to the specifications from Xiaomi, the nominal battery capacity in the Redmi Note 8 Pro is 4500 mAh. This figure is indicated on the device box, in the specifications on the official website and in the documentation.

• 🔋 Typical vs. minimum capacity: Manufacturers often specify a "typical" capacity, which may differ slightly from the real one due to production tolerances. For the Redmi Note 8 Pro, the minimum capacity is 4400 mAh by standards.

It is important to understand that the actual capacity of a new battery can be 1-3% higher than the declared capacity (up to 4,635 mAh) – this is normal and due to the technological features of production.

Real tests: how many mAh shows independent checks

Independent labs and enthusiasts have tested the Redmi Note 8 Pro for capacity, with results varying, but generally confirming Xiaomi’s honesty:

• 🔬 Test from GSMArena: In the review of 2019, the smartphone showed a capacity of 4480-4,520 mAh when fully charged, which fits into the permissible deviations.
• 📊 User Measurements: On forums (e.g, 4PDA Mi Community – owners share data from the engineering menu, which fixes values from 4350 to 4580 mAh on new devices.
• ⚖️ Comparison with competitors: For comparison, Samsung Galaxy A50 (2019) had a battery of 4000 mAh, and the Realme 5 Pro – 4035 mAh, making the Redmi Note 8 Pro the leader in capacity in its segment.

In some regions (e.g. India), Xiaomi shipped the Redmi Note 8 Pro with a 4500 mAh battery but with a different charging controller, which affected the rate of recharge. In Russia and Europe, all devices were equipped with a standard battery.

⚠️ Warning: If you check through the engineering menu (#4636###) and see a capacity below 4,000 mAh on a device older than 1 year, this is a sign of severe wear and tear.

How to check the current battery capacity in mAh

You can find out the real battery capacity of the Redmi Note 8 Pro in several ways, from built-in tools to third-party applications.

1. through the engineering menu (no root)

The simplest method that does not require installation of software:

1. Open the Phone app.
2. Enter the combination: ##4636###.
3. Go to the Battery Information tab.
4. Find the line Capacity (or Capacity) - there will be the current value in mAh.

Applications for diagnostics

If the engineering menu is not available (on some firmware), use the utilities:

• 📱 AccuBattery (Google Play): Shows battery wear, current capacity and discharge rate. Use the app for 2-3 days for accurate data.
• 🔧 AIDA64: In the Battery section, the battery displays detailed information, including the design capacity.
• 🛠️ CPU-Z: Less accurate, but shows basic information about the battery.

Charge your smartphone to 100%|Disable battery optimization for diagnostic application|Do not use the device during the test|Repeat measuring 2-3 times for accuracy-->

Important: apps can show residual capacity (adjusted for wear) rather than nominal capacity, for example, if AccuBattery delivers 4100 mAh, it means that the battery is worn out by ~9%.

3. Hardware inspection (for advanced)

If you are ready to disassemble the smartphone, you can measure the capacity with a multimeter or using the USB-tester (e.g., tester, UM25C). This method provides the most accurate information, but requires skills:

1. Take down the Redmi Note 8 Pro (instructions are available on YouTube).
2. Disconnect the battery plume and connect it to USB-tester.
3. Completely discharge and charge the battery, fixing the data.

⚠️ Warning: Disassembling your smartphone will void the warranty (if it is still valid) and may damage your device.

Why the real capacity is less than claimed: 5 reasons

Even on the new Redmi Note 8 Pro, battery capacity can be below 4,500 mAh.

• 🔋 Manufacturing Dispersion: Permissible Deviation for Lithium Polymer Batteries — ±5 percent, so 4275-4500 mAh is the norm.
• 📉 Wear from first cycle: The battery starts to degrade immediately after first use. Capacity can drop by 10 to 15 in a year%.
• ⚡ Improper charging: Using left-handed chargers, overheating or charging to 100% at high temperatures accelerate degradation.
• 🔄 Deep discharges: If you regularly discharge your smartphone to 0%, the capacity decreases faster.
• 🛠️ Replacement of the battery with the non-original: Cheap analogues often have a capacity of 3,500-4000 mAh instead of the declared 4500 mAh.

The average battery life in the Redmi Note 8 Pro is 300-500 full charge cycles, and then the capacity drops to 70-80% of the original, and the smartphone requires a battery replacement. With heavy use (such as playing + constantly charging), this threshold can be reached in 1.5-2 years.

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To extend the life of the battery, try to keep the charge in the range of 20-80%. Use the original charger and avoid overheating (do not put the smartphone on charging in direct sunlight).

How to prolong the life of a battery: 7 working ways

While battery degradation is inevitable, it can be slowed down. Here are the proven methods for the Redmi Note 8 Pro:

• 🔌 Use original charging: Xiaomi chargers (especially those with Quick Charge 3.0 support) are optimized for smartphone battery. Left-handed charging can deliver unstable voltage.
• ☀️ Avoid extreme temperatures: Optimal range for lithium polymer batteries is 10–35°C. At 40.°C and higher degradation is accelerated by 2 times.
• 📵 Disable unnecessary functions: GPS, Bluetooth, NFC And the background activity of the applications consumes the charge. → Energy saving mode can be limited to background work.
• 🔄 Don't discharge to 0%: Deep discharges damage the battery. Try to recharge the smartphone at 15-20%.
• 🌙 Charge overnight correctly: If you leave your smartphone on charge all night, use a timer outlet or turn off power after reaching 80-90%.
• 🔋 Calibrate the battery: Every 2-3 months, completely discharge the smartphone before turning off, then charge to 100% without interruptions.
• 🛡️ Update the firmware: Xiaomi regularly optimizes power consumption in updates MIUI. Check the relevance of the software in the settings → The phone. → Updating the system.

Gamers’ advice: If you play heavy games often (like Call of Duty Mobile or Genshin Impact), reduce your frame rate to 30 FPS and turn off vibrations, which will reduce the load on the Mediatek Helio G90T processor and reduce battery consumption by 15-20%.

When it’s time to change the battery: signs of wear

If the Redmi Note 8 Pro battery capacity dropped below 3,500 to 3800 mAh, it's a kriticheski signal, but there are other signs that the battery needs to be replaced:

• ⚡ The smartphone discharges by 30-50% per hour without active use (for example, in standby mode).
• 🔥 Overheating during charging: if the body is heated to 45-50°C (can be checked with an infrared thermometer).
• 📉 Sudden shutdowns at 20-30% charge – a sign that the controller is not displaying the level correctly.
• 🛑 Charging is interrupted or is jerked (for example, jumps from 50% to 60% and back).
• 🕒 The time of operation in active mode was reduced to 2-3 hours (at the initial 6-8 hours).

The cost of replacing the battery in the Redmi Note 8 Pro in 2026:

• Original battery: 1500–2500 ₽ (depending on the region).
• Analogue (quality): 800–1200 ₽.
• Replacement at the service center: 500–1000 ₽ (job).

⚠️ Warning: When replacing the battery, be sure to check that the wizard uses the original adhesive to fix the battery.A wrongly installed battery can swell or detach when falling.

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If your smartphone turns off at 10 to 15 percent charge, don't be quick to blame the battery. Try resetting to factory settings first (Settings → Settings → Settings → Resetting). Sometimes the problem lies in software errors, not hardware.

Comparison with other Xiaomi models: who keeps the charge longer

The Redmi Note 8 Pro with its 4500mAh looks impressive against the competition of 2019, but how does it compare to other Xiaomi smartphones?

Interestingly, the Redmi Note 8 Pro loses to newer models in capacity, but thanks to the optimized processor Mediatek Helio G90T and MIUI 12/13 It shows comparable operating times. F3 equal-capacity (4520 Macah discharges faster due to the more powerful Snapdragon chipset 870.

If you’re choosing between the Redmi Note 8 Pro and the newer model for the sake of the battery, take note:

• 🔋 Capacity: The difference of 500-600 mAh gives +1.5–2 hours of work.
• ⚡ Fast charging: Redmi Note 9 Pro supports 33W, a Note 8 Pro - only 18W.
• 📱 Software optimization: New versions MIUI Better manage energy consumption.

FAQ: Frequent questions about the Redmi Note battery 8 Pro