Replacement of the battery in the smartphone Xiaomi: a complete guide with photos and videos

The battery is the heart of your Xiaomi smartphone, and over time, its capacity inevitably declines. If the phone runs out in a few hours, spontaneously turns off at 20-30% charge or the body is swollen, it’s time to think about replacing the battery. In this article, we will discuss all the steps of the procedure, from diagnosing a malfunction to installing a new battery, including selecting tools, disassembling the device and testing the result.

Many users are afraid to disassemble their smartphone for fear of damaging it. However, with the right approach and accuracy, replacing the battery in Xiaomi is an easy task even for a beginner. We will describe each step in detail, point out typical errors and give recommendations on choosing a quality battery. And if you are not sure about yourself, we will tell you how to choose a service center and avoid getting scammed.

⚠️ Important: A bloated battery is a potential fire hazard! If the phone case is deformed, don't delay the replacement and try to puncture the battery.

1.How to know if the battery is time to change: 5 key signs

Before you start the screwdriver, make sure that the problem is the battery. Here are the main symptoms of battery wear in Xiaomi smartphones:

🔋 Phone's running out of power. 3-4 hours in normal use (social networks, instant messengers, calls).
📉 The percentage of charge "jumps": for example, with 40% drops 15%, or the phone is turned off when 20-30% leftover.
🔥 The body of the smartphone swelled (especially noticeable if you put it on a flat surface - it will swing).
⚡ Charging is extremely slow or the phone does not hold a charge even after full charging.
🛑 The device overheats during charging or operation (the battery can heat up to a certain point). 45-50°C).

If you see at least 2-3 signs on the list, the probability of battery wear is 90%. For accurate diagnostics, you can use applications like AccuBattery (available on Google Play), it will show the real capacity of the battery and the degree of wear, for example, if the original capacity was 4000 mAh, and now 2500 mAh, the battery urgently needs to be changed.

⚠️ Warning: Some symptoms (slow charging, overheating) may be caused by a malfunction of the power controller or charger.Before changing the battery, check the phone with a different charger and cable.

📊 How often do you change the battery in your smartphone?

Every 1-2 years

Every 3-4 years

Only when the phone stops working

Never changed.

I don't know how often you need to.

2. Selection of a new battery: original vs. analogues

The quality of the battery not only affects the life of the phone, but also its safety, and cheap fakes can swell in a month or even ignite.

Type of battery	Pluses	Cons	Price (rupe)
The original (Xiaomi)	6-12 months warranty, full compatibility, long service life	High price, difficult to find in small towns	1500–3500
Licensed analogue (ATL, Samsung SDI, Lishen)	Quality is close to the original, more affordable	The capacity may differ slightly (by 5-10%)	800–2000
Budgetary analogue (no-name)	Low price, quick delivery	Risk of bloating, small resource (6-12 months)	400–1000

Xiaomi smartphones are better to choose batteries from proven manufacturers: ATL (for most models), Samsung SDI (for flagships) or Lishen (for budget devices). Original batteries can be ordered on AliExpress (official Xiaomi stores) or bought at service centers.

🔍 The article (must be the same as the original, for example, MB-J10 For the Redmi Note 10 Pro).
📦 Packaging (original has hologram, protective stickers, serial number).
📏 Size (even 1 mm difference can interfere with installation).

Critical: Xiaomi batteries are often faked! For example, in 2023, ATL branded fakes with a capacity 30 percent lower than the declared one appeared on the market. Check the seller's reviews and demand a check/guarantee.

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Before buying a battery, check it for authenticity with the Xiaomi Service app (available from the Mi App Store). Enter the battery serial number in the Check Battery section.

3. Replacement tools: what will be needed

To replace your battery on your own in Xiaomi, you’ll need a minimal set of tools, without which you risk damaging the plumes, the case, or the battery itself.

🔧 Plastic blades/mediators (2-3 (a) - for the careful liding and disconnection of the plumes.
⚙️ Set of screwdrivers (cross-haul) PH00, flat 1.5 mm, five-pointed Y00 for some).
🔥 Dryer or thermo-air station - to soften the glue under the battery (temperature) 60-80°C).
🧲 Magnetic mat or tray – not to lose cogs (in Xiaomi there can be 15 of them)+ piece!).
🩹 Captone tape or insulation of contacts after replacement.
🔋 New battery (see section above).
🧴 Alcohol or contact cleaner – to remove glue residues.

If you are disassembling a smartphone for the first time, we recommend buying a repair kit (costs 300-500 rubles on AliExpress or Ozon). It includes all the necessary tools, including suction cups for screen removal. For models with a glued body (for example, Xiaomi 13 or Redmi K60), you will additionally need a special glue (for example, B-7000) to fix the new battery.

⚠️ Warning: Do not use metal blades to tweak the battery! They can puncture the battery and cause a short circuit. Take only plastic or wooden tools.

☑️ Preparation for battery replacement

Turn off the phone and remove it. SIM-mapMake a backup copy of the dataCharge your phone to 30-50% (for safety)Prepare the workplace (good lighting, no dust)Check the availability of all tools

Done: 0 / 5

4. Step-by-step instructions: how to disassemble Xiaomi and replace the battery

The process of replacing the battery varies depending on the model, but the overall scheme is the same. We will look at the universal algorithm using the popular devices: Redmi Note 10/11, POCO X3/X4, Xiaomi 12/13. For accurate instructions on your model, look for disassembly on YouTube (Xiaomi Repair or Fixez channels).

Step 1: Turning off and preparing the phone

Turn off your smartphone completely. Remove the tray for SIM-If the battery is swollen, do not open the body by force - first warm up the back cover with a hair dryer (1-2 minutes) to soften the glue.

Step 2. Remove the back cover

In most Xiaomi models, the lid is mounted on latches and glue. Insert a plastic blade into the gap between the body and the lid (usually starting at the bottom edge where the charging connector is located). Carefully drive the blade around the perimeter until the lid moves away. In models with a glued screen (for example, Xiaomi 13 Pro), you will need to warm up with a hair dryer to 70-80 ° C.

Step 3: Disconnection of plumes and batteries

When you remove the lid, you'll see the battery covered by a metal plate, unscrew the screws (usually 4-6 pieces) and remove the plate.

Disconnect the battery connector (it is under a black insulation tape).
Carefully tuck the camera plumes, speaker and buttons (they are fragile!).
If the battery is glued, warm it up with a hair dryer (not higher than 80 ° C!) and tuck it with a plastic spatula.

Step 4: Installation of a new battery

Before installing the new battery:

Clear the contacts with alcohol.
Check that the new battery has a protective film (if it is not, stick a captone tape).
Stick the battery onto double-sided tape or a special glue (such as the B-7000).

Connect the battery connector and make sure the plumes don't overflex. Put the phone back together.

⚠️ Note: In Xiaomi models with wireless charging (such as the Xiaomi 13 Ultra), there is a coil under the battery!

What to do if the battery is too tight?

If the battery is not amenable even after warming up, try to gently pull on special "ears" (if any) or use the threads to remove the batteries (sold in repair kits).

5. Frequent mistakes and how to avoid them

Even experienced craftsmen sometimes make mistakes when replacing batteries, and here are the most common problems and ways to prevent them:

🔌 Screen plume damage occurs when the lid is not removed neatly. Solution: use plastic shoulder blades and take your time.
🔥 Battery overheating when soldering - if you solder contacts, don't hold a soldering iron longer than 3 seconds Solution: Use a thermo-air station with a temperature of no more than 300°C.
📱 The phone doesn't turn on after assembly -- it's often the fault of an unconnected plume or battery connector. Solution: disassemble the phone again and check all connections.
🔋 The new battery discharges quickly - maybe you bought a fake or didn't calibrate the battery.Solution: Follow through 2-3 full-cycle.

Another common mistake is to use the wrong adhesive, such as superglue or moment can damage the body in the next repair, and only use special adhesive for electronics (B-7000, LOCTITE 406).

Tip: After you replace the battery, reset the Mi Battery Optimization settings in the Settings → Battery menu. This will help the new battery to calibrate correctly.

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If the phone overheats or discharges quickly after the battery is replaced, the power controller is likely to be the problem, and a diagnosis is required at the service center.

6. Calibration of the new battery: why it matters

The new battery needs to be trained so that the power controller can correctly determine its capacity, and without calibration, the phone can either show the wrong percentage of charge or run out quickly.

Use your phone until it is automatically turned off (0%).
Charging up to 100%: Connect the original charger and charge the phone up to 100% without interrupting the process.
Charge support: Leave your phone charging for another 1-2 hours after reaching 100%.
Repeat the cycle 2-3 times for accurate calibration.

After calibration, check the actual battery capacity in the AccuBattery app, and if it differs by more than 10% from the claimed battery capacity, you may have been sold a fake.

⚠️ Warning: Do not use fast charge during the first 3 calibration cycles. Charge your phone with a standard charger (5W-10W).

7. when is it better to contact the service center

Although you can replace the battery in Xiaomi yourself, in some cases it is better to trust the professionals:

🛠️ If you have a model with a glued body (for example, Xiaomi) 13T or Redmi K70) — Disassembly requires experience and special equipment.
⚡ If after the replacement the phone does not turn on or artifacts appeared on the screen - perhaps damaged the plumes.
🔧 If you are unsure of your skills or are afraid of losing your warranty (on some Xiaomi models, the warranty is retained when replacing the battery in authorized services).

Cost of replacing the battery in the service center:

Original battery + work: 2000-4500 rubles.
Analog + work: 1200-2500 rubles.

How to choose a reliable service:

🔍 Check reviews on Yandex.Maps or Google Maps.
📄 Ask if you have a work warranty and battery (at least 3 months).
💬 Check if they use original parts or certified counterparts.

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Before visiting the service center, take a picture of the phone's IMEI (dial *#06#) and the battery serial number.

FAQ: Answers to Frequent Questions

❓ Can you replace the battery in Xiaomi without a hairdryer?

Theoretically, yes, but it's risky. Without warming up, the glue remains strong, and you can damage the plumes or the body. For models with a removable lid (for example, the Redmi 9A), a hair dryer is not necessary, but in most modern Xiaomi the body is glued.

❓ How much does the battery last Xiaomi?

Average lifetime of the original battery — 2-3 year 500-800 When used intensively (games, video) the capacity may drop to 70% through 1,5 To extend the life of the battery, avoid full discharges and overheating.

❓ What to do if a new battery blows up in a month?

It's a sign of marriage or forgery. Turn off your phone immediately and remove the battery. Seek a replacement at the warranty. If you bought it from a service center, claim damages (under the Consumer Protection Act).

❓ Can I use a phone with a bloated battery?

Absolutely not! A bloated battery can burst or ignite. Even if the phone turns on, the risk of short circuit remains, turn off the device and replace the battery as soon as possible.

❓ How to check if the original battery is installed?

Xiaomi's original battery has: A hologram with the Mi logo. Serial number that can be checked in the Xiaomi Service app. Factory packaging with protective stickers. Counterfeits often have blurry text, curved seams or no labeling.