How to get the battery from the smartphone Xiaomi: instructions with photos and warnings

Removing the battery from a Xiaomi smartphone is a challenge that owners face when replacing the battery, repairing after falling or getting moisture. Unlike older models with removable covers, the modern Redmi, POCO and flagship series (Xiaomi 13/14, Mix) have a non-shattered case where the battery is glued to the rear panel, which complicates the process, but does not make it impossible with the right approach.

In this article, you will find step-by-step instructions for different models, a list of tools you need, and critical warnings to avoid damage to the board or display. We will look at both standard cases (replacing a bloated battery) and atypical ones, such as battery removal after corrosion from moisture, all based on the experience of service centers and testing on popular models from 2020-2026.

When to remove the battery from Xiaomi

The battery in Xiaomi smartphones is one of the most vulnerable components, and it may need to be replaced in several cases:

• 🔋 Battery bloating – the body deforms, the screen “steps away” from the frame, the device overheats. Redmi Note 10/11 and POCO X3/X4 are particularly susceptible to this problem after 1.5–2 years of use.
• ⚡ Fast discharge – the smartphone discharges in 2–3 hours with moderate use, although it used to hold a charge for a day. Often found on Xiaomi Mi 9/10 after upgrading to MIUI 14.
• 💧 Moisture intrusion – even if the phone is turned on after drying, corrosion on the battery contacts can cause a short circuit after a few months.
• 🔧 Repair of other components — for example, replacing a charging connector or speaker requires the battery to be disconnected to avoid damage to the board.

It is important to distinguish the actual need to extract from situations where the problem is solved software. For example, if the smartphone discharges quickly, first check Settings → Battery → Battery Use – perhaps the background application is to blame, not the battery itself.

⚠️ Warning: If the battery is so swollen that the screen is already "stepping away" from the case, do not try to turn the smartphone on or connect to charging - this can lead to a fire.

Tools for safe battery recovery

The work requires a specialized set of tools, and the use of improvised tools (knives, screwdrivers of the wrong size) often causes damage to plumes or scratches on the body.

Waterproof models (Xiaomi 12/13 Pro, Redmi K50 Ultra) will additionally require a special sealant (e.g. B-7000) to be reassembled. Conventional Scotch or superglue will not provide leakproofness!

If you plan to reuse the battery (for example, for testing), purchase a battery connector (cost ~500 ₽) that allows you to supply power to the board without soldering, which is convenient for diagnosis.

Turn off your smartphone and remove it. SIM-map|Make a backup of the data (in case of damage to the fee)|Charge the battery to 30-50% (blown batteries at 0% dangerous)|Prepare a workplace with good lighting|Wear an antistatic bracelet (optional but recommended)-->

Step-by-step: how to open the case and get the battery

The process is different for removable back cover models (rare after 2018) and non-shallable smartphones. We will look at a universal method suitable for most Xiaomi devices from 2020-2026, including the Redmi Note 11/12, POCO F4/F5, Xiaomi 13T.

Step 1: Heating the body

The battery-locking glue becomes elastic at 60–80°C. Use a dryer:

1. Set the temperature at 70-80 ° C (at maximum power, the hair dryer can melt plastic!).
2. Heat the back cover in circular motions for 2-3 minutes, paying attention to the edges.
3. Check the temperature with your hand – the body should be hot, but not burning.

Step 2: Separation of the body

Use a suction cup and a mediator:

1. Place the suction cup closer to the lower edge (where the charging connector is).
2. Carefully pull up - a gap of 1-2 mm should appear.
3. Insert a mediator into the gap and slowly lead along the edge, separating the clips. In the POCO X3 and Redmi 10 models, the clips are usually 8-10 pieces.

Important! If the body doesn't respond, don't force it -- probably the glue hasn't warmed up enough. Repeat step 1.

Step 3: Battery disconnection

After the opening of the hull:

1. Find the battery plume – it is usually located under a protective black film connector of the daughterboard.
2. Carefully tuck the connector with tweezers (don't pull the wires!). In Xiaomi 12S Ultra models, the plume can be glued - use alcohol to soften the glue.
3. If the battery is swollen, don't try to bend it, it can cause the shell to rupture. Instead, stick the edge with a plastic spatula and slowly pull up, pouring alcohol under the battery.

For models with double-sided tape (e.g. Redmi 9A), a special battery suction cup (cost ~800 ₽) will be required, which creates a vacuum and allows the battery to be pulled out without jerking.

Features of battery extraction in popular Xiaomi models

The design of the housings and the battery mounts vary between series, and the key differences for the most common devices are the following.

Redmi Note 10/11 Pro and POCO X3/X4

These models have:

• 🔧 12 clips around the body perimeter (including hidden volumes).
• 🔋 The battery is glued with double-sided tape + additional strips of glue at the edges.
• ⚠️ Fragile plume of the fingerprint scanner - when the case is opened, it is easily damaged.

Tip: before heating, remove the back cover of the glass-shield film (if any) - it can melt.

Xiaomi 12/13/14 and Mix 4

Flagship models are more difficult to disassemble:

• 🔧 The body is sealed (complete replacement required after disassembly).
• 🔋 The battery is soldered to the board with additional contacts (disconnect carefully!).
• 💧 Water resistance IP53 - is lost when disassembled unless a new sealant is used.

For these models, a professional tool is recommended – for example, the Quick 861DW station for accurate heating.

Redmi 9A/9C and budget models

The easiest ones to disassemble:

• 🔧 Only 6 clips, the body opens without heavy heating.
• 🔋 The battery is attached to one-way tape, and you can separate it with your hands.
• ⚠️ Thin display plumes -- when you lift the screen, fix them with tape.

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For models with a AMOLED- screen (e.g., POCO F3 GT), use a silicone mediator – it does not scratch the display when accidentally contacted.

Frequent Mistakes and How to Avoid Them

Even experienced craftsmen sometimes make mistakes that lead to permanent damage to the smartphone.

1. Overheating of the case - the hair dryer at maximum power melts plastic clips or plumes. Solution: use a thermometer to control temperature (optimally - 70-80 ° C).
2. The jerks that you get when you decouple the battery -- you can break your contacts or puncture the shell, so you can use alcohol and a plastic spatula, and you can move slowly from edge to center.
3. Forgetting to disconnect the battery plume before extraction leads to a short circuit. Solution: always check the power outage with a multimeter (voltage between + and - should be 0 V).
4. They use metal tools, they scratch the body and they can close the contacts, so the solution is plastic or wood only (like polycarbonate mediators).

⚠️ Warning: If the smartphone stops turning on after the battery is removed, check the fuse on the board (marked F1 or F2 next to the battery connector).

Another common problem is that the flexible plume of the display is damaged when the screen is lifted up. In the Redmi Note 8/9 models, the plume runs under the battery and is easily hooked by a mediator. To avoid this, lock the plume with tape to the case before removing the battery.

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If the battery is swelling but the smartphone is still working, turn it off immediately and do not plug it into charging. The risk of fire from bloating more than 5 mm is ~15% (2023 service centers).

What to do after removing the battery

Successfully getting the battery is only half the battle, depending on the reason for the disassembly:

If the battery is swelling

• 🔍 Examine the board for corrosion (green plaque) or damaged components.
• 🧹 Clean the battery contacts with isopropyl alcohol (do not use water!).
• 🔋 Recycle old battery at reception points (bloated batteries should not be thrown into regular garbage!).

If you are planning to install a new battery

• 🛒 Buy a battery with the same capacity and model number (e.g., for the Redmi Note 10 Pro — BM4B).
• 🔧 Use a new double-sided scotch (complete with battery or separately).
• 📱 Once installed, calibrate the battery: fully charge, then discharge to 0% and recharge to 100%.

If you have been repairing other components

• 🔧 Check all plumes for integrity (especially on the speaker and camera).
• 🔋 Connect the battery and check the voltage with the multimeter - it should be 3.7-4.2 V.
• 📱 Turn on your smartphone and test the sensors (gyroscope, accelerometer) — they can get lost when heated.

For water-resistant models (Xiaomi 13 Pro, Redmi K60) after assembly, apply UV- glue to the joints of the body and irradiate with a UV lamp (10-15 seconds).

When is the best time to contact the service center

Despite the detailed instructions, some situations require professional intervention.

• 🔥 The battery smokes or smells of smoke, which is a sign of thermal acceleration.
• 💧 The body is highly corroded after moisture (green plaque on the board).
• 🔧 You have damaged the display plume or board (apparently burned components).
• 📱 The smartphone does not turn on after proper assembly (hardware via EDL may be required).

Cost of battery replacement in the service:

• Redmi Note 10/11: 1 500–2 500 ₽ (including work).
• Xiaomi 12/13: 3 000–5 000 ₽ (due to the complexity of disassembly).
• POCO F3/F4: 2 000–3 500 ₽.

If you doubt your skills, don’t take the risk – modern Xiaomi smartphones have thin plumes and multi-layered boards where a single bug can result in repairs costing half the price of the device.

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Service centers often guarantee a replacement battery (3-6 months), whereas self-repairing is 30% more likely to cause re-blowning (according to the iFixit 2023 study).

FAQ: Frequent questions about Xiaomi battery recovery