How to test the battery on Xiaomi Redmi: a complete guide with tests and tips

The battery is one of the most vulnerable components of the smartphone, especially in the budget and mid-budget models of Xiaomi Redmi. Over time, the battery capacity decreases, the device begins to drain faster, and in some cases even suddenly shut down at 20-30% charge. If you notice such symptoms, it’s time to check the status of the battery. In this article, we will examine all the available methods of testing, from built-in MIUI tools to professional applications and hidden engineering menus.

It's important to understand that not only is battery testing a way to diagnose a current condition, but it's also a way to prevent serious problems, such as a bloated battery can damage a screen or motherboard, and a miscalibration can cause false charge rates, and we'll tell you how to avoid these risks and what to do if tests show a critical battery condition.

1. Built-in tools MIUI: quick check without applications

Xiaomi has integrated several useful battery monitoring features into MIUI firmware, which won’t provide as much detail as third-party utilities, but will allow you to assess the overall battery health in a few minutes.

The easiest way is to use the Battery Status menu.

1. Open Settings → Battery and Performance.
2. Slap the gear icon (⚙️) top-right.
3. Select the Battery Status.

Here you will see the approximate percentage of wear (if it exceeds 20-25%, it is time to change the battery) and the current capacity in mAh. Note that this data may be inaccurate on some Redmi models due to the features of the firmware.

Another built-in tool is the Energy Consumption Journal, which shows you which applications and processes are using up the most power, and you can open it.

1. Go to Settings → Battery and Performance → Battery Use.
2. Select a period (e.g., "Last Charging").
3. Look for apps with abnormally high consumption (over 10-15% in a short period of time).

⚠️ Note: If you see an Android System or Mediaserver process in your consumption log with a consumption of more than 20%, this may indicate not only battery wear, but also software errors.

2. Engineering menu codes: hidden battery tests

Xiaomi Redmi smartphones have a hidden engineering menu that allows you to get more detailed information about the battery. USSD-Important: Not all codes work on new models (e.g. Redmi Note 12 or Redmi) 13C), Most of them are compatible with Qualcomm Snapdragon devices.

Basic codes for checking the battery:

• 🔋 ##4636## — opens the Testing menu, where in the Battery Information section you can see the charge level, temperature, voltage and technology (Li-ion/Li-Po).
• 📊 ##284## - battery test (does not work on all models, may give an error).
• 🔍 ##6484## — Checking hardware, including battery (for older Redmi models) 4/5).

Once you enter the code, you will be taken to the technical menu, and note the following parameters:

• Level: Must match the one displayed on the screen, if the difference is greater than 10%, calibration is required.
• Voltage: Li-Po batteries are normal for 3.7-4.2 V at 100% charge. If the voltage is below 3.5 V, the battery is severely worn out.
• Temperature: The optimal range is 20-40°C. Exceeding 45°C is dangerous for the battery.

Third-party applications: in-depth analysis of the battery

The built-in MIUI tools and engineering menus provide basic information, but for accurate diagnosis, it's better to use specialized applications, which allow you to track capacity, the number of charging cycles, the discharge rate, and even predict the remaining battery life.

Top.-3 Battery testing applications on Xiaomi Redmi:

For the most accurate test, we recommend using AccuBattery.

1. Charge your smartphone to 100% and disconnect from the network.
2. Use the device as normal until the charge drops to 15-20%.
3. Open the app and go to Health tab, and you'll see the wear score and the actual capacity in mAh.

Charge your smartphone to 100%|Disable battery optimization for the application|Do not use ultra-saving mode|Wait till the discharge is over. 15-20%-->

⚠️ Note: If the AccuBattery is less than 70% of the factory capacity (e.g., 2,500 mAh instead of 4,000 mAh), the battery needs to be replaced.

4.Discharge test: how to check real working hours

One of the most reliable ways to assess the state of the battery is a discharge test, which shows how long the smartphone will last from 100% to 0% at a standard load. For Xiaomi Redmi, normal performance depends on the model:

• 📱 Redmi 10/11/12 series: 6–8 hours of active use (screen, messengers, social networks).
• 📱 Redmi Note 9/10/11 Pro: 8–10 (Thanks to the battery on the day) 5000–5020 mAhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh).
• 📱 Redmi 9A/9C/10A: 4–6 Clocks (budget models with low-power processors).

How to run the test:

1. Charge your smartphone to 100% and disconnect from charging.
2. Turn on the In-plane mode to eliminate network influence.
3. Set the screen brightness to 50%.
4. Run a video on YouTube (offline) or turn on the game (for example, Call of Duty Mobile on the medium settings).
5. Set the time to full discharge.

If the battery life is 30 percent or more below normal, it's a clear sign of battery wear. For example, if the Redmi Note 11 Pro runs out in 4 hours instead of 8, the battery capacity has dropped by about half.

💡

For a more accurate test, use the PCMark for Android app (free version) that simulates real loads (web surfing, photo editing, video) and gives objective results on battery life.

5. Check for bloating and physical damage

Even if software tests show normal results, the physical condition of the battery can be critical. A bloated battery is not only a risk of damage to the smartphone, but also a fire hazard.

• 🔧 The screen or back cover began to "step away" from the body.
• 🔧 The smartphone became worse to lie on a flat surface (swings).
• 🔧 Power/volume buttons are harder to press.
• 🔧 On the screen appeared "waves" or white stripes (pressure on the plume).

How to check:

1. Place your smartphone on a flat surface (such as a table).
2. Press the screen lightly at the corners, and if it bends or you hear a crunch, it's a sign of bloating.
3. Try to move the back cover (if it's removable) if it sticks out, the battery needs to be replaced.

⚠️ Warning: If you have confirmed that the battery is bloating, immediately stop using your smartphone. Lithium polymer batteries can ignite when deformed. Do not attempt to open the case yourself - contact the service center.

On some Redmi models (such as the Redmi 9T or Redmi Note 8 Pro), the back cover is glued to the back cover.

• 🔧 Plastic shoulder blade or mediator.
• 🔧 Dryer for heating glue (temperature not higher than 60)°C).
• 🔧 Suction cups (for models with glass back panel).

6. Battery calibration: when and how to do it

If the smartphone suddenly turns off at 20 to 30 percent charge or shows the wrong percentage, the problem may be to desynchronize the power controller, in which case calibration will help. It will not restore capacity, but return the correct charge values.

Calibration instructions for Xiaomi Redmi:

1. Discharge your smartphone before automatically shutting down (0%).
2. Connect the original charger and charge up to 100% without interrupting the process (even if the indicator shows 100%, wait another 1-2 hours).
3. Turn off the charging and turn on the smartphone.
4. If the percentage of charge immediately fell (for example, from 100% to 80%), repeat the discharge / charge cycles 2-3 times.

On some models (such as the Redmi Note 10 Pro), the calibration may not work due to the controller's specific features, in which case the reset via the engineering menu will help:

Enter the code ##36446337## → select Battery Calibration → confirm reset.

💡

Calibration only helps with software failures: If the battery is physically worn out (blown, capacity < 60%), calibration will not restore its performance.

7.When it's time to change the battery: criteria and tips

Replacement of the battery is required in the following cases:

• 🔋 Real capacity (accuBattery) less than 60% of the factory.
• 🔋 Smartphone discharges in 2-3 hours without load.
• 🔋 The battery swelled or deformed.
• 🔋 The device overheats when charging (>50°C).
• 🔋 Charge "jumps" (for example, from 40% to 1% per second).

When replacing the battery with Xiaomi Redmi, consider:

• 🛠️ Use original batteries or certified analogues (e.g. Baseus or Remax).
• 🛠️ For models with a non-removable cover (for example, Redmi Note 11) will require glue B-7000 sealable.
• 🛠️ After replacement, perform calibration (see previous section).

Cost of battery replacement in service centers:

If you decide to replace the battery yourself, be sure to follow the following safety measures:

• 🔌 Use an antistatic bracelet or work on a dielectric surface.
• 🔌 Do not touch the battery contacts with metal objects.
• 🔌 Do not leave your old battery unpacked (seal the contacts with tape).

FAQ: Frequent questions about Xiaomi Redmi battery