How to know exactly the model of the battery on Xiaomi: all the ways from physical inspection to software methods

You're trying to replace the battery on a Xiaomi smartphone, but you don't know what battery model is installed in your device? This problem is familiar to many owners of Redmi, POCO or Mi phones - the manufacturer rarely indicates the exact labeling of the battery in the documentation, and counterfeits in the market force you to be extremely careful when choosing. A mistake in the model can lead to incompatibility, rapid wear or even damage to the charging controller.

In this article, we’ll look at all the ways you can define a battery model, from visual inspection of the board to hidden service codes and specialized applications. You’ll learn where to look for labels on a battery, how to decipher Xiaomi’s factory designations, and why sometimes even the original battery may not fit your phone model. And for those who are afraid of damaging the device, we’ve prepared safe software methods without disassembling the smartphone.

1. Physical inspection of the battery: where to look for marking

The most reliable way is to remove the back cover and inspect the battery, and all Xiaomi’s original batteries are labeled with factory markings that include:

• 🔋 Battery model (e.g. BM40, BM47, DM-09)
• 📏 Capacity in mAh (may differ from the specified characteristics of the phone)
• 🔌 Voltage (usually 3.85V or 4.4V for fast charging)
• 🏭 Manufacturer code (e.g. ATL, SDI, LISHEN)

The labeling is most often placed on a white sticker at the top of the battery (near the contacts) or on the board itself. On some models (for example, the Redmi Note 10 Pro), the data is duplicated on the black battery case with laser engraving.

If you're not sure you're seeing the original battery, pay attention to the print quality: on fakes, the text is often blurred and the sticker is peeled off. Xiaomi's original batteries have holographic protection on a sticker with the brand logo that changes color when tilted.

⚠️ Warning: When removing the lid on non-removable battery models (e.g. Xiaomi 12T or Redmi K50), a suction cup and a plastic mediator are required. Using metal tools can damage the plumes or body!

2. Service codes and hidden menus: how to find out the model without disassembling

Use service codes that display battery information, these commands run on most Xiaomi smartphones running MIUI (including POCO and Redmi):

##4636##
##6484##
##36446337##

After entering any of the codes, the Testing or Battery Information menu will open, which will indicate:

• 🔋 Health (battery status in %)
• 📊 Voltage (current voltage)
• 🔍 Model Name or Battery ID (model or serial number)

On some firmware (e.g. MIUI 14), these codes may not work, so try an alternative method:

1. Open the Phone app.
2. Enter *#06# and it will display the IMEI and additional information.
3. Tap on IMEI and hold for 3 seconds - sometimes this opens a hidden menu with battery data.

If the codes didn’t work, check the MIUI version in the settings: Settings → About Phone → MIUI version. On firmware older than MIUI 12, service menus are often blocked for security reasons.

3. Diagnostics Apps: Top-5 Utility for Android

If the service codes don't work, install one of the specialized applications that reads data from the battery controller and shows the exact model, capacity and even the number of charging cycles.

The most accurate result is AccuBattery, which not only shows the model, but also calculates the actual capacity with wear and tear, for example, if your Redmi Note 9 Pro originally had a 5020 mAh battery and the app shows 4200 mAh, that's a signal to replace it.

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If the app shows the battery model as "Unknown" or "N/A," try restarting the phone and running the diagnostics again. Sometimes the battery controller does not respond due to temporary failures.

⚠️ Warning: Some applications (e.g. Battery HD) may show incorrect data on custom firmware smartphones. If you use LineageOS or Pixel Experience, trust AccuBattery or AIDA64 only.

Xiaomi official data: how to find a model by serial phone number

If none of the previous methods worked, go to official sources, and the manufacturer maintains a battery compatibility database for each smartphone model, and here's how to find out:

1. Go to the Xiaomi support website.
2. Type your phone model (like the Redmi Note 11 Pro+5G) into the search bar.
3. Select the Specifications section of → Battery.
4. Find Battery Model or Part Number.

For example, the official website for the Xiaomi 11T Pro specifies the BM50 battery model, and for the POCO X3 Pro, the DM-09.

If your phone model doesn’t show up on a global site, try:

• 🌍 Switch to a regional domain (e.g. mi.com/cn for China).
• 📄 Check the documentation in the smartphone box (sometimes the battery model is listed on the warranty card).
• 📧 Write in support of Xiaomi with IMEI and serial number (you can find them in Settings → About phone).

Note that on some models (e.g. Xiaomi Mi 11 Ultra), the manufacturer uses two different batteries for different regions, for example, for the European market can be installed BM4B, and for the Chinese market - BM4C.

5. Battery compatibility: can I install a battery from another model

A common question is, "Can I put a Redmi Note 8 battery in a Redmi Note 8 Pro?" The answer depends on three factors:

1. Physical dimensions: the battery must fit exactly into the designated area, for example, a BM40 (4000 mAh) will suit the Redmi Note 7, but will be too large for the Redmi 7A.
2. Voltage and Controller: 4.4V batteries (such as the BM47 for the Xiaomi 11T) are not compatible with 3.85V devices.

The table below shows examples of compatibility of popular models:

If you are experimenting with non-original batteries, consider:

• 🔋 Capacity may vary: for example, instead of 5,000 mAh, you get 4,500 mAh, which will reduce the running time.
• 🔥 Fast charging may not work: non-original batteries often do not support 33W or 67W.
• ⚠️ Warranty burns: Xiaomi will deny service if it finds an unoriginal part.

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Even if the battery is physically fit, its charging controller may not be compatible with the phone’s motherboard, resulting in permanent reboots or no charging.

6.How to avoid fakes: signs of the original Xiaomi battery

Xiaomi’s parts market is flooded with fakes that are seemingly indistinguishable from the originals, and here are 5 key signs that can be used to identify a quality battery:

1. Packaging: The original batteries come in a sealed antistatic package with a Xiaomi hologram and QR- code.The fakes are often sold in plain cellophane.
2. Sticker: The original text is clear, error-free, and the barcode is scanned (check through the Barcode Scanner app).
3. Weight: The original battery weighs more because of the quality materials. For example, the BM40 should weigh ~95g, not 70g.
4. Contacts: on the original they are covered with gold alloy, and on the fake - with ordinary copper, which is oxidized.
5. Price: If the battery costs 2-3 times less than the market average (for example, BM47 for 500 ₽ instead of 1500 ₽), it is 100% fake.

Before buying, check the seller:

• 🛒 On AliExpress, look for stores with a rating above 98% and reviews with photos.
• 🏢 In markets (for example, Savelovskiy in Moscow) require a stamped warranty card.
• 🔍 At Xiaomi service centers, ask for a certificate for parts.

If you have already bought a battery and doubt its originality, do the following test:

1. Install AccuBattery and fully charge your phone.
2. See the actual capacity in the Health section.
3. Compare this to the stated difference: if the difference is greater than 10%, the battery is fake or badly worn.

FAQ: Frequent questions about Xiaomi batteries