Xiaomi Redmi Note 8 Pro is quickly discharged: the reasons and how to fix

Your Xiaomi Redmi Note 8 Pro has been on charge for days, and now barely lasts until the evening? Fast discharge is one of the most common problems for owners of this smartphone, especially after 2-3 years of use. But it is not always the fault of the worn battery: often the fault is software failures, background processes or incorrect settings.

In this article, we’ll look at 7 key reasons why the Redmi Note 8 Pro has become a fast-setting device, and give you concrete solutions, from battery calibration to battery replacement, how to check battery status through hidden menus, which apps are eating up charge in the background, and why even the original charger can be a problem, and at the end, an FAQ with frequent questions and an interactive survey for owners.

Spoiler: 60 percent of the time, you can fix the problem without repair -- you can optimize the settings or reset the cache -- but if the battery is swelling or has lost more than 30 percent of its capacity, you'll need a replacement. Let's get it straight.

1. Battery wear: how to check and what to do

The average battery life of the Redmi Note 8 Pro is 300-500 full charge cycles (about 2-3 years of active use), after which the capacity begins to fall by 10-20% annually. If the phone runs out by 30-50% per hour in normal use, first check the status of the battery.

This can be done in two ways:

• 🔋 Using the engineering menu code, enter the combination ##4636## in the Phone app, select Battery Information. Level will show current charge and health will show state (ideal - good).
• 📊 AccuBattery (free on Google Play) will show real capacity (for example, 3500 mAh instead of the stated 4500 mAh) and the percentage of wear and tear.

Critical: if the capacity has fallen below 2500-3,000 mAh, the battery needs to be changed — no optimization will help. When worn more than 40%, the battery not only discharges quickly, but can swell, which is dangerous for the screen and motherboard.

⚠️ Warning: If the phone body is deformed (screen "rise"), immediately turn off the device and do not use it until the battery is replaced.

2. Background processes and "gluttonous" applications

Even a new battery will run out in a few hours if there are energy-intensive applications in the background, especially if you have:

• 🎮 Games (PUBG, Genshin Impact, Call of Duty – can consume up to 15% charge per hour even when folded.
• 📷 Social networks (TikTok, Instagram, Facebook) – constantly update content and use geolocation.
• 📍 Navigators (Google Maps, Yandex.Maps) – include GPS Mobile data simultaneously.
• 🔄 Auto Updates (Play Market, MIUI Updater – download data in the background.

To find the culprit, go to Settings → Battery → Battery Use. This shows applications that are sorted by charge consumption. If any of them consume more than 10% per day, limit their activity:

Limit background activity in the application settings | Disable Auto-Update for Games |Remove the application from Auto-Run (Settings → Permissions → Auto-Run) |Enable battery saving mode for individual applications-->

Pay special attention to system processes like Android System or Mediaserver, if they consume more than 15% of the charge, this is a sign of a virus or firmware failure, in which case the reset to factory settings (for this, see section 5).

💡

Turn on Charge Savings manually when less than 20% is left: it turns off background activity and increases the running time by 30-50%.

3. Non-original charger or cable

The Redmi Note 8 Pro supports fast 18W charging, but only with the original charger.

• ⚡ Give insufficient current, which makes the phone charge longer and discharge faster.
• 🔥 Overheating the battery, speeding up its wear.
• 📉 Cause voltage surges, which leads to failures of the power controller.

How to check the charger:

1. Connect the original cable and charger from Xiaomi (the unit must be labeled MDY-11-ED or MDY-11-EU).
2. Start charging and look at the indicator: if the label “Slow Charging” appears, the charger is faulty or incompatible.
3. Use the Ampere app (Google Play) to measure the current.Rate for the Redmi Note 8 Pro is 2.0-2.5A for fast charging.

If the current is below 1.5A, replace the cable or adapter. Also check the USB-C port on your phone - often there will accumulate dust or oxidize contacts. Clean it with a wooden toothpick (not a metal object!).

⚠️ Warning: Never use chargers from other brands (such as Samsung or iPhone) without Quick Charge 3.0 support.They can damage the Redmi Note 8 Pro power controller, which will result in a complete failure of charging.

4. Firmware failures and MIUI errors

MIUI updates are not always optimized for older models. Since MIUI 12.5-14, many Redmi Note 8 Pro users have experienced an accelerated discharge due to:

• 🐛 Bugs in the kernel of the system (for example, an error with the constant operation of the qti module responsible for communication).
• 🔄 Frequent reboots of background services.
• 📱 Incorrect operation of the “Dark Theme” mode (in some versions it increases the load on the system) GPU).

Decisions:

1. Reverse to stable version of MIUI: Settings → About Phone → MIUI Version → Press 7 times on “Kerole” → Select stable firmware (for example, MIUI 12.0.3).
2. Cache Cleanup: Settings → Memory → Clear cache (or via Recovery: turn off your phone, press Power + Vol+ → Wipe Cache).
3. Disabling unnecessary functions MIUI: 🔍 Settings → Additionally. → Confidentiality → Special permits → Delete “Float display». 📡 Settings → SIM-maps and mobile networks → Deactivate “Enhanced call».

If the problem has occurred after the update, check the reviews on forums (such as 4PDA or Xiaomi Community).

5. Hardware malfunctions: what breaks most often

If software methods don't work, the problem may be hardware, and here are the most common Redmi Note 8 Pro malfunctions affecting the battery:

The most common failure is battery bloating, and you can tell by the following:

• 📱 The screen is "moving away" from the body (especially in the upper part).
• 🔋 The phone is not on the table (swinging).
• 🔥 Overheating even with a small load.

If you suspect bloating, don't try to disassemble the phone yourself - the risk of short circuit is high. Contact the service center. The average cost of replacing the battery in 2026:

• 🛠 Original battery: 2000–2500 ₽ (work).
• 🔋 Analogue (good quality): 1200–1800 ₽.

💡

Replacement of the battery is better done in authorized Xiaomi services – they give a warranty of 6-12 months and use original spare parts.

6. Wrong settings: what to disable for savings

Even a serviceable Redmi Note 8 Pro will quickly run out if power-intensive features are enabled.

• 📡 Continuous search of the web 4G/5G: Settings → SIM-maps and mobile networks → Type of network → Choose. 3G (If you don’t need high-speed internet).
• 📍 Geolocation and GPS: Settings → Confidentiality → Permits → geodata → Disable for unnecessary applications.
• 🔄 Autosynchronization: Settings → Accounts. → Turn off sync for Google, Mi Account, etc..
• 🎵 Vibration and sounds: Settings → Sound. → Press vibration → Shut down.
• 🌓 Adaptive brightness: Replace with manual adjustment (optimum 40–50%).

Also check the performance mode: Settings → Additional → Performance → Select Balanced.

High Performance Mode increases the CPU clock speed, which leads to additional battery consumption by 15-20%.

Another hidden charge eater is the dual app function, which is called messenger cloning, and each clone consumes resources separately. Turn it off in Settings. → Annexes → Dual annexes.

7.When it's time to carry for repairs: signs of critical breakdowns

If you’ve tried all of these, but the Redmi Note 8 Pro still runs out in 2-3 hours, it’s probably a hardware problem.

• 🔋 The battery swelled or deformed the body.
• 🔌 The phone does not charge or only charges in a certain position.
• 📉 Charge drops in leaps (for example, from 50% to 1% per minute).
• 🔥 The body is very hot even without loading.
• 🛠 After the battery replacement, the problem remained (possibly the power controller is faulty).

Average repair prices in 2026:

Before visiting the service, make a backup of data - repairs may require a complete reset, and check if the warranty is valid (even if the phone is purchased long ago, you can sometimes restore the warranty card through Mi Account).

💡

If the phone is warranty, do not open it yourself - this will void the warranty Xiaomi.

FAQ: Answers to Frequent Questions