Xiaomi Redmi 8: how many milliamp-hours (mAh) in the battery and how it affects the smartphone

Introduction: Why Redmi 8 battery capacity is important to users

The Xiaomi Redmi 8, launched in 2019, is still a popular choice among users who value balance of price and functionality. One of the key advantages of this model is its battery – the manufacturer claimed record capacity for the budget segment. But how many milliamp hours (mAh) are hidden under the device’s body, and how does this affect autonomy?

In this article, we will not only answer the question of the nominal capacity of the battery, but also understand how to check the actual wear of the battery, what factors reduce its life, and how to properly charge the Redmi 8 to extend the life of the device.

We'll focus on technical issues, like why a 5,000mAh capacity doesn't always mean 100% autonomy, and how firmware, apps, even the temperature of the environment can affect it, and if you own a Redmi 8 or are planning to buy it, this information will help you avoid common mistakes and make the most of your smartphone.

Official specs: how many mAh in Redmi 8 according to Xiaomi

According to the official specification from Xiaomi, the Redmi 8 smartphone is equipped with a lithium polymer battery with a capacity of 5000 mAh. This value is indicated on the device box, in technical documents and on the manufacturer’s website.

• 🔋 Nominal vs. Real Capacity: Claimed 5000 mAh is the nominal value. The actual capacity may be slightly lower. 2-5%) Due to the technological characteristics of battery production.
• 📱 Model versions: Redmi 8 was produced in several versions (for example, Redmi). 8A redmi 8A Pro, but the base version always had a 5,000mAh battery.
• 🔄 Wear over time: Even with careful use, the battery capacity gradually declines. 2-3 During the year of active operation, the real capacity may fall to 3500–4000 mic.

It is important to understand that 5000 mAh is not a guarantee of a certain time, autonomy depends on many factors: screen brightness, application activity, network quality and even temperature. For example, with heavy use (games, video calls, navigation), a smartphone can run out in 6-8 hours, while in standby mode it lasts 2-3 days.

How to check the real capacity of the Redmi 8 battery

If you want to know how worn your Redmi 8 battery is, there are a few ways to check its current capacity, which will help you know if it’s time to think about replacing the battery or optimizing the settings enough.

The most reliable method is to use special applications or engineering menus. Here is a step-by-step instruction:

1. Install the AccuBattery app (available on Google Play) that shows the actual battery capacity, temperature, charging and discharging speed.
2. Connect your smartphone to charge and wait for full charge (100%).
3. Use the phone as normal until the charge drops to 20-30%. AccuBattery will analyze the data and show the current capacity in mAh.

An alternative way is through the engineering menu (does not work on all firmware):

Enter the dialer in ##4636##


Go to the tab "Battery Information"

You'll see level, voltage, and temperature, but this menu doesn't show the exact capacity in mAh, so it's better to use AccuBattery or analogues (CPU-Z, AIDA64).

Factors Affecting Wear of Redmi 8 Battery

Redmi 8 battery capacity decreases over time, no matter how careful you are with the device, but there are some factors that speed up the process.

• 🔥 High temperature: Overheating (above 40)°C) destroys the chemical structure of the battery. Avoid charging in the sun or near heat sources.
• ⚡ Frequent full discharges: Lithium-polymer batteries do not like deep discharges (below) 10-15%). Optimally keep the charge in range 20–80%.
• 🔌 Use of non-original chargers: Cheap cables or power supplies can deliver unstable voltages, which harms the battery.
• 📶 Continuous network search: In areas with poor signal, the smartphone spends a lot of energy on maintaining communication, which increases the load on the battery.

Rapid charging at high temperatures is particularly harmful, such as charging Redmi 8 on a hot day while playing a heavy game, the battery can overheat, which will shorten its lifespan, and applications in the background that constantly sync data (such as instant messengers or email clients) are also negatively affected.

⚠️ Attention: If your Redmi is 8 He suddenly turned off when 20-30% And it's a sure sign of a battery that's wearing out, and then it could have dropped below the battery. 3000 mAh, and replacement is inevitable.

Comparison of Redmi 8 capacity with other Xiaomi models

To better understand how good the Redmi 8 battery is, compare it to other popular Xiaomi models of the same period and newer devices, which will help assess whether to consider upgrading or optimizing the current smartphone enough.

As you can see from the table, the Redmi 8 is not inferior in battery capacity to newer models such as the Redmi 9. However, battery life depends not only on mAh, but also on the optimization of the software and hardware platform. For example, the Poco X3 NFC with a 5160 mAh battery lasts longer thanks to a more energy-efficient processor.

If you choose between a Redmi 8 and a newer model, look not only at the battery capacity, but also at the Android version, support for fast charging and the availability of energy-saving modes. AMOLED-The screen may be more profitable despite the lower nominal capacity.

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If your Redmi 8 is running out quickly, try calibrating the battery: completely drain the phone, then charge to 100% without interruption. Repeat the procedure 2-3 times.

How to extend the life of the battery Redmi 8: practical tips

Even if your battery is already far from 5,000 mAh, a few simple rules can help slow its degradation and improve its autonomy.

• 🌙 Use a dark theme: Redmi 8 is installed IPS-A screen that is not as sensitive to the color scheme as AMOLED, But the dark theme still reduces the load on the processor and, as a result, on the battery.
• 📵 Disable unnecessary connections: Wi-Fi, Bluetooth, GPS And mobile data in the background consumes a lot of power.
• 🔄 Limit background activity: In Battery settings → Battery Optimization Disable Autostart for Unnecessary Applications.
• 🔋 Charge correctly: Don't leave your phone on charge all night. Optimal to turn off power when you reach 80-90%.

Another effective way is to lower the resolution of the screen. Redmi defaults. 8 work HD+ (720p), But if you put it out. 540p In the developer settings, this will reduce the power consumption of the 10-15%. To incorporate this regime:

Go to Settings → About Phone → MIUI version (click 7 times to activate Developer Mode)


Return to Settings → Additional → Developers → Minimum screen width




Set the value of 360 dp (equivalent to 540p)

Also worth paying attention to is the power saving mode, which in MIUI is called Supercharge saving, and it turns off background processes, limits performance, and reduces screen brightness, which can extend the running time by up to 30-40% in critical situations.

⚠️ Note: If you use wireless charging (via an adapter), remember that it heats the battery more than wired. For the Redmi 8, this is not the safest option, as the model does not officially support the Qi standard.

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

Even with careful use, after 2-3 years, the Redmi 8 battery capacity can drop to 60-70% of its original capacity, and here are key signs that the battery needs to be replaced:

• 🔌 Fast discharge: The phone sits down in 3-4 hours with minimal load (for example, only messengers and calls).
• ⚡ Sudden shutdowns: The smartphone turns off at 20-30% charge, although it used to work up to 0%.
• 🔥 Overheating: The battery heats up strongly even when used normally (not while charging or playing).
• 📉 Bloating: The phone body has deformed, or under the back cover you can see bloating (it's dangerous! turn off the device immediately).

If you see at least two of these symptoms, it’s time to think about replacing the battery: the cost of a new battery for the Redmi 8 in 2026 is about 1000-1500 rubles, and replacing it at the service center will cost 500-800 rubles additionally, and self-replacement is not recommended – the risk of damage to the plumes or power controller is too high.

Before replacing, check if there are any problems with the software. For example, resetting to factory settings (Settings → Additional → Recovery and Reset) sometimes helps to regain the previous autonomy if the cause of the discharge was background processes or viruses.

FAQ: answers to frequent questions about the Redmi 8 battery

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Redmi 8’s 5,000mAh battery capacity is good for a budget smartphone, but real autonomy depends on optimizing the system, applications and operating conditions. Regular diagnosis and proper charging will help extend the battery life.