Xiaomi Redmi 8: how many amps in the battery (mAh), technical nuances and secrets of long work

Xiaomi Redmi 8, released in 2019, is still a popular choice among budget devices due to its balanced hardware and impressive autonomy. The model’s main trump card is a 5,000 mAh battery – a record for its time in the segment up to 10,000 rubles. But what does this figure mean in practice? How much is in ampere, how long will the battery last and how to properly operate it, so as not to reduce the life of the battery?

In this article, we will not only analyze the nominal capacity of the Redmi 8 battery in ampere hours, but also reveal the technical details: real capacity after wear, charging speed, comparison with other Xiaomi models, as well as give practical tips for calibrating and diagnosing the battery. If you are planning to buy a used device or have already faced rapid discharge, here you will find answers to key questions.

How many amps in the battery Xiaomi Redmi 8: official and real data

Xiaomi officially claims that the Redmi 8 has a 5,000 mAh (milliamp-hour) lithium polymer battery, which is equivalent to 5 Ah (amp-hours) when converted into standard units, but it is important to understand the difference between nominal and real capacity:

• 🔋 Nominal capacity: 5000 mAh (indicated on the box and in the specifications).
• ⚡ Real capacity: 4800-4,950 mAh (including natural wear after 1-2 years of use).
• 📉 Critical wear: below 3,500 mAh (at this level, battery replacement is required).

Important: Ampere-hour (Ah) and milliampere-hour (mAh) capacity is a measure of charge, not voltage. Redmi 8 battery voltage is 3.85 V, which is typical for lithium polymer batteries. To calculate the energy in watt-hours (Wh), use the formula:

Capacity (Wh) = Capacity (mAh) × Voltage (B) / 1000


For Redmi 8: 5000 × 3.85 / 1000 = 19.25 Wh

This is a useful indicator for comparison with powerbanks or other devices, for example, the Redmi 8 battery is comparable in energy to the battery of a laptop with a capacity of ~20 Wh, but in a smartphone it is optimized for low power consumption.

How to check the real capacity of the Redmi 8 battery: Step-by-step instructions

Over time, the battery capacity decreases due to chemical wear and tear, and to find out the current state of the Redmi 8 battery, use one of the following methods:

Method 1: Through the Engineering Menu (without root)

This method works on most Xiaomi devices without the need to install third-party apps:

1. Open the Phone app and enter the combination: ##4636##.
2. In the menu that opens, select Battery Information.
3. Pay attention to the parameter Charge level (in %) and Capacity (in mAh).

Method 2: AccuBattery Application (exact data)

AccuBattery (available on Google Play) analyzes the charging cycles and shows the actual capacity with wear and tear.

Charge your phone to 100% |Distribute to 15-20% without recharging |Check the Health tab for capacity data |Repeat the cycle 2-3 times for accuracy-->

⚠️ Note: If the app shows a capacity below 4000 mAh when the phone is less than 2 years old, this is a sign of a malfunction of the battery or power controller.

Redmi 8 battery compared to other Xiaomi models

The 5,000mAh capacity was revolutionary for the budget segment in 2019, and let’s compare it to other popular smartphones of the brand:

As you can see from the table, the Redmi 8 is not inferior in capacity to even newer models, but loses in charging speed. For example, the Poco X3 NFC with a 5160 mAh battery supports 33-watt charging, which reduces the time of full charging from 2.5 to 1.5 hours.

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If your Redmi 8 is discharged faster than in the table, check the background processes in Settings → Battery → Battery Use. Often the fault of messengers (Telegram, WhatsApp) or games with high FPS.

Why is Redmi's battery 8 quick-setting: top-5 causes and solutions

Even with a capacity of 5000 mAh, users sometimes experience rapid discharge. Let's consider the main reasons and ways to eliminate them:

• 🔌 Unoriginal charger: Using cheap adapters causes unstable voltage and overheating of the battery.Solution: Buy the original Xiaomi power supply (18 watts) or a certified counterpart (for example, from Baseus or Anker).
• 📱 Application background activity: Social media and instant messengers are constantly synchronizing data.Solution: Turn off auto-run in Settings → Annexes → Permits → Auto-start.
• 🌡️ Overheating: Temperatures above 40°C accelerates battery degradation Solution: Remove the case while charging and avoid direct sunlight.
• 🔄 Frequent charging cycles: Connecting to charge at 20-80% charge increases cycles.Solution: Charge your phone from 15% to 90% to extend its lifespan.
• 🛠️ Battery wear: After 500 full cycles, capacity drops by 20 to 30 percent.Solution: Replace battery (cost) ~1500–2,000 rubles).

⚠️ Warning: If the phone is running 10-15% off overnight on standby, it’s normal for the Redmi 8 due to optimization MIUI. But if the drop is more than 20%, check the battery for wear and tear or viruses.

How to extend the life of the battery Redmi 8: expert recommendations

The average life of a lithium polymer battery is 2-3 years (or 500-800 charge cycles). To delay replacement as much as possible, follow these tips:

1. Use the original cable: Cheap wires with thin veins increase resistance, which leads to overheating.
2. Avoid full discharge: Deep discharge (below 5%) damages the chemical structure of the battery.
3. Update MIUI: New firmware versions optimize power consumption. Current up-to-date version for Redmi 8 is MIUI 12.5 (Android 10).
4. Disable unnecessary functions: 📡 Continuous search for Wi-Fi network (Settings) → Wi-Fi → Additionally) 📍 Geolocation in the background (Settings) → Confidentiality → Permits) 🔊 Vibration when dialing (Settings) → Sound)

Critical fact: The Redmi 8 battery does not support fast charging above 18W. Using 30W+ chargers will not speed up the process, but may damage the power controller.

Redmi 8 battery replacement: cost, complexity and where to order

If the battery capacity has dropped below 3,500 mAh and the phone is less than 4-5 hours, it’s time to think about replacing.

• 💰 Cost: Original battery: 1500-2000 rubles. Analog (for example, Remax): 800-1200 rubles. Work of the master: 500-1000 rubles.
• ⚙️ Difficulty replacing: 7/10 (Experience with a soldering iron is required to detach the plume).
• 🛒 Where to buy: Official Xiaomi service centers (warranty 6 months).Versified stores: AliExpress (sellers rated 98%+), Beru, Svyaznoy. Local workshops (check reviews!).

⚠️ Warning: Replacing the Redmi 8 battery on your own risks damaging the flexible plume of the display (located next to the battery).If you are unsure of your skills, trust the work to a professional.

After replacing the battery, be sure to calibrate:

1. Charge your phone to 100% and hold on charging for another 1 hour.
2. Turn off the power and discharge until it is automatically turned off.
3. Repeat the cycle 2-3 times.

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Xiaomi’s original battery has a holographic sticker with a serial number and QR-It's often faked on analogues, so check with the seller for a certificate.

FAQ: Frequent questions about the Xiaomi Redmi 8 battery