The battery is one of the most vulnerable components of a smartphone, and owners of Xiaomi, Redmi or POCO devices sooner or later face the need to check its condition or model. You may have noticed that the phone has become more discharged, overheated or does not hold charge at all. Or you are planning to replace the battery and want to make sure that you buy the original part. In any case, without accurate data on the battery model, the risk of running into a fake or incompatible component increases significantly.
In this article, weβll look at 5 proven ways to know how to find a Xiaomi battery, from simple methods through phone settings to disassembling the case and using service codes. Youβll also learn to distinguish the original battery from a fake, check its capacity and even assess wear without special equipment. And for those who are afraid of damaging the device, weβve prepared safe alternatives using mobile applications.
Important: if your smartphone is still warranty, disassembly of the case can cancel it, in such cases, it is better to contact the Xiaomi service center or use software diagnostic methods.
1. Checking the battery model through phone settings
The easiest and safest way is to use the built-in MIUI tools. It does not require disassembling the device or installing third-party applications, but it is not suitable for all Xiaomi models.
Go to Settings β About Phone β All specs. Some firmware may have different paths: Settings β System β Device β Battery Information. Here you will find basic information:
- π Type of battery (e.g. Li-Polymer or Li-Ion)
- π Nominal capacity (for example, 4000 mAh or 5000 mAh)
- π’ Model number (e.g, BM47, BM4D or DM-01)
If the battery information section is missing, try the alternative path: Settings β Battery and Performance β Battery status. Some devices (such as the POCO F3 or Redmi Note 10 Pro) display the current wear level as a percentage.
β οΈ Note: On smartphones with custom firmware (for example, LineageOS or Pixel Experience), battery data may be incorrectly displayed or absent at all.
2. Use of service codes for diagnostics
Hidden engineering menus provide advanced information about the battery, including actual capacity, voltage and temperature.
- π± ##4636## is a universal code for Android. Go to the Battery Information tab.
- π§ ##6484## - Battery test (works on some Redmi models).
- π ##64663## - Advanced diagnostics (includes charging and wear data).
Once you enter the code, you'll see a table with the parameters.
| Parameter | What does it mean? | Normal values |
|---|---|---|
| level | Current charge in % | 0β100% |
| voltage | Battery voltage | 3.7-4.4 V (depending on model) |
| temperature | Temperature in Β°C | 20-45Β°C (with normal operation) |
| health | Condition (wear and tear) | Good (good), unknown (unknown) |
If the health field displays unknown, it doesnβt always mean a problem β some MIUI firmware doesnβt support this setting, so use third-party apps (more on that in the next section).
π‘
If the code doesn't work, try entering it in the Phone app, not through the keyboard in the menu. Some Xiaomi models require you to press the call button after you type in.
3. applications for battery testing: AccuBattery, CPU-Z and others
If the built-in tools don't provide enough information, third-party utilities will come to the rescue, and they will not only show the model of the battery, but also help you assess its actual capacity, discharge rate and even residual life.
Top.-3 diagnostics:
- π AccuBattery analyzes charging cycles, shows wear and recommends optimal settings to extend the life of the car. Plus: works without root rights. Minus: requires calibration (multiple full charging cycles).
- π CPU-Z β Battery displays model, technology (Li-Po/Li-Ion), voltage and temperature. Plus: no adjustment required.
- π οΈ AIDA64 β It's a professional tool with detailed information, including the battery serial number and production date, plus: as complete as possible.
Example of data from AccuBattery for Xiaomi Redmi Note 11 Pro+:
Battery model: BM4F
Technology: Li-Polymer
Design capacity: 4850 mAh (out of 5000 mAh)
Depreciation: 14%
Temperature: 32Β°Cβ οΈ Attention: Apps like AIDA64 They may show a defective battery model if it has been replaced informally, so check the data against the labels on the battery itself (see section on disassembly).
Charge the phone to 100%|Turn off battery optimization for diagnostic app|Do not use your phone during the test.|Repeat the test 2-3 times for accuracy-->
4.Physical Check: How to Disassemble Xiaomi and Read the Labeling
If the software doesn't work, you'll have to disassemble the device, and this is the last but most reliable way, you'll see the exact model of the battery, the date of production, even the factory code, but remember, if you disassemble the device incorrectly, you can damage the plumes or the antenna modules.
You'll need:
- π§ Plastic mediator or guitar mediator (to open the body).
- π¨ Torx screwdriver T3 or Y000 (model).
- 𧲠Magnetic substrate for screws (so as not to lose).
- πΈ Camera (to photograph the location of the parts before disassembly).
Step-by-step:
- Turn off the phone and remove it. SIM-map.
- Heat the back cover with a hair dryer (temperature ~60Β°C) for 1-2 minutes β this will soften the glue.
- Insert the mediator into the gap between the case and the screen (start at the bottom edge) and gently tuck the cover.
- Unscrew the screws holding the metal plate over the battery.
- Remove the plate and find the sticker on the battery β there is a model (for example, BM47 3850mAh 3.85V).
Example of markings on the Xiaomi Mi 11 battery:
Model: BM4K
Capacity: 4600mAh / 17.62Wh
Voltage: 3.85V
Made in China
Date: 2021-05-15What to do if the battery is blown?
5.How to distinguish the original Xiaomi battery from a fake
Not only do fake batteries fail faster, they can also cause a fire or explosion, and here are the key signs of the original:
- π Factory packaging: original Xiaomi batteries come in sealed film with brand logo and hologram.
- π Labeling: The label must clearly print the model, capacity, voltage and production date, and counterfeits often have blurry text or typos (e.g., "Made in Chian").
- π Serial number: original batteries have a unique SN (Serial number, which can be checked on the Xiaomi website or through the Mi Service Center app.
- π Contacts: the original contacts are covered with gold coating, and forgeries often use cheap copper.
Comparison of the original and fake for Redmi Note 9 Pro:
| Sign. | Original battery | Fake. |
|---|---|---|
| Packaging | A dense hologram film | Thin polyethylene without protection |
| Sticker | Clear typeface, laminated. | Blurred letters, poor quality glue |
| Weight. | Heavyer (for example, 45g for BM47) | Easy, 10-20%. |
| Price. | 1500β3000 β½ (model-wise) | 500β1200 β½ |
If you buy a battery on AliExpress or Marketplace, be sure to check the seller's reviews and request a photo of the real product with the label. Xiaomi's original batteries are sold only in branded service centers or from official partners.
π‘
Even if a fake battery is identical in appearance to the original, its actual capacity is often underestimated by 20 to 30 percent, for example, instead of the claimed 5,000 mAh, you get 3,500 to 4,000 mAh.
6. Check the battery status via computer (ADB and Mi Flash)
For advanced users, there is a way to check through ADB (Android Debug Bridge), which allows you to get data that is not displayed in the standard menu, including the actual capacity and number of charging cycles.
Instructions:
- Install ADB Tools on your computer.
- Turn on USB Debugging on your phone (Settings β About Phone β MIUI version β press 7 times, then go back to Additional Settings β For Developers).
- Connect your phone to your PC and type in the command line: adb shell dumpsys battery
- Look for the lines of capacity (current charge), voltage (voltage) and charge counter (real capacity in ΞΌAΒ·h).
Example of output for POCO X3 Pro:
level: 85
voltage: 4123 mV
temperature: 305 (32.5Β°C)
charge counter: 3850000 ΞΌAh (3850 mAh)
health: 2 (good)To find out the wear, compare the charge counter to the nominal capacity. For example, if the denomination is 5000 mAh and the charge counter is 4000 mAh, the wear is 20%.
β οΈ Attention: Use ADB The wrong commands can cause a reset or damage to the firmware. Do not enter unknown commands from unreliable sources!
7.When it's time to change the battery: signs of critical wear
Even if you know the model of the battery, it's important to know when to replace it.
- β‘ Fast discharge: the phone loses 20-30% of its charge in 1 hour on standby.
- π₯ Overheating: the body heats up even when lightly loaded (for example, during a bell).
- π Charging problems: The phone only charges in a certain position of the cable or refuses to charge above 80%.
- π Sudden shutdowns: the phone turns off at 15-20% charge, although it used to work to 0%.
- π₯ Bloating: back cover raised, screen "plays" when pressed.
If you see at least 2-3 signs on the list, the battery should be replaced soon.
- Damage to the motherboard due to overheating.
- Data loss in case of sudden shutdown.
- Fire (in extremely rare cases).
Xiaomiβs average battery life is 2-3 years (or 500-800 charge cycles).If your phone is older, check the battery even if there are no obvious symptoms.