How to remove the battery from the Xiaomi phone: disassembly without damage

Removing the battery from a Xiaomi smartphone is a challenge that users face when replacing the battery, repairing or diagnosing malfunctions. Unlike older models with removable covers, modern Redmi devices are a challenge, POCO or Mi requires careful disassembly because the battery is glued to the body and connected to the motherboard, and failures in dismantling can cause plumes to be damaged, the battery to burn, or the phone to break down.

This guide will be suitable for most Xiaomi models of recent years, from the budget Redmi Note 12 to the flagship Xiaomi 14 Pro. We will analyze the necessary tools, step-by-step process and key nuances that even some service centers ignore. If you have never disassembled smartphones, you better trust it to professionals. But if you decide to act on your own, follow the recommendations below to avoid typical mistakes.

Preparation: What will be needed to remove the battery

Before you start disassembling, make sure you have everything you need. Using the wrong tools is the main cause of damage to the case or battery in 78% of users trying to disassemble Xiaomi themselves (service centers data for 2023).

Minimum set for safe battery recovery:

• 🔧 Plastic mediators or shoulder blades (metallic can scratch the body or puncture the battery).
• 🔥 Dryer or thermo-air station (to soften the battery-holding glue).
• 🧲 Magnetic screwdriver (cross, size) PH00 or PH0 Xiaomi screws).
• 🧴 Isopropyl alcohol (90%+) or a special adhesive solvent for batteries.
• 🔋 Screen suction cup (helps lift the lid on models with glue fastening).
• 🛡️ Gloves and safety glasses (the battery can ignite if damaged!).

Also, prepare your workspace: a table with good lighting, an antistatic mat (if any) and a screw container are easy to lose. Xiaomi often uses screws of different lengths, so you can’t confuse them when you build them.

⚠️ Warning: If the battery is swelling (phone cover is raised, screen is "stepping away" from the case), do not try to remove it yourself. The risk of fire or explosion in this case is extremely high.

Step 1: Turn off the phone and remove the back cover

The first step is to turn off the device and access the internal components, and even if the phone doesn't turn on, the battery can remain energized and pose a danger.

How to turn off Xiaomi before disassembling:

1. Press the power button for 10-15 seconds until the screen goes out.
2. If the phone doesn’t respond, plug it into charging – sometimes a discharged battery blocks the onset.
3. For forced shutdown on some models (e.g, POCO F5) We need to clamp down on power. + Volume up for 20 seconds.

After you turn it off, move to the back cover, and most Xiaomi models have it attached to glue and latches.

1. Heat the hair dryer of the edge of the cover (temperature) ~60–70°C) for 2-3 minutes to soften the glue.
2. Insert a plastic mediator into the gap between the lid and the case (start at the bottom edge where the connectors are located).
3. Carefully drive the mediator around the perimeter, snapping the clamps. Do not force - if the lid does not respond, heat longer.

In the models with IP53 (For example, the Redmi Note 12 Pro+) The lid can sit tighter because of the sealing, and the suction cup will help, glue it to the screen and pull it up while you're putting the mediator on.

Step 2: Disconnect the battery plume

When you take the lid off, you'll see the battery glued to the body and a thin plume going to the motherboard. First rule: never pull the plume -- it's easy to tear it off!

Instructions for unsetting:

1. Find the battery connector on the motherboard (usually black or orange, marked as BATT battery).
2. Carefully slap the connector with a plastic spatula, pulling up. Don't use metal tools!
3. If the connector is "stiffened", drop a little isopropyl alcohol on its base and wait 10 seconds.

On some models (for example, Xiaomi 13 Ultra), the connector can be closed with a metal plate - it must be unscrewed beforehand.

• 🔹 B - battery propellers;
• 🔹 M - motherboard screws;
• 🔹 D - screws of the display module.

⚠️ Warning: If you have a smoke or burn smell when you turn off the plume, stop disassembling immediately! This is a sign of a short circuit. Put the phone aside on a non-combustible surface and don't touch it for 10-15 minutes.

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Take a picture of the plumes and screws before you turn off, which will help you avoid back-assembly errors, especially if you're disassembling your phone for the first time.

Step 3: Removing the battery from the housing

Now the most important step is to separate the battery from the body. Xiaomi uses double-sided tape or high-strength adhesive, so you can't just pull the battery.

Method 1: Softening of the glue with alcohol (for most models)

1. Apply isopropyl alcohol (90%+) under the battery with a syringe or pipette. 1-2 ml is enough.
2. Wait 5-7 minutes for the glue to dissolve.
3. Carefully tuck the battery with a plastic spatula, starting at the edge where there are no components.

Method 2: Heating + lever (for models with a thick adhesive layer)

1. Heat the body with a hair dryer (temperature) ~80°C) for 3-5 minutes.
2. Place a plastic card or mediator under the battery and slowly lead along the case, separating the battery.
3. If the battery fails, repeat the heating.

Important: Don't use metal tools to tamper with the battery, they can puncture it, which will lead to electrolyte leakage or fire. Also avoid bending the battery more than 10 times.° — It damages the interior layers.

Step 4: Check the battery after retrieval

Once the battery is removed, check it for damage.

• 🔋 Bloating – if the battery case is deformed, it cannot be used.
• 💧 Electrolyte traces – white or green plaque on contacts.
• 🔥 Darkening or melting - a sign of overheating.
• 📏 Thickness – compare with a new battery (in a bloated thickness increases by 1-3 mm).

If the battery is swelling, don't throw it into the trash. Xiaomi uses lithium polymer batteries that can spontaneously ignite, dispose of it at special reception points or hand it over to a service center.

Also check the contacts on the motherboard: if they are oxidized (green or black coating), clean them with alcohol and a soft brush. Oxidation can cause poor contact and rapid discharge of the new battery.

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If the battery has even microcracks or punctures, it must be disposed of. A damaged battery can explode when charged or heated!

Common Mistakes and How to Avoid Them

Even experienced users make mistakes when removing the battery from Xiaomi, and here are the most common ones and ways to prevent them:

Mistake 1: Using metal tools

Knives, screwdrivers or tweezers can puncture the battery or scratch the motherboard, so you can only use plastic or nylon mediators.

Mistake 2: Overheating of the body

If the hair dryer is longer than 5 minutes or above 90°C, you can melt plastic latches or damage the screen. Solution: warm in short intervals (1-2 minutes) and check the temperature with your hand (the body should be hot, but not burning).

Mistake 3: Strong battery bending

Lithium polymer batteries are non-deformable, if you pull the battery over the edge at an angle of more than 15.°, Solution: Separate the battery evenly, putting it on the perimeter.

Mistake 4: Loss of screws or improper assembly

The screws in Xiaomi are often different in length, and if you confuse them in places, you can damage the motherboard, so you can group the screws or take pictures of their location before disassembling them.

Mistake 5: Ignoring glue residue

If you don't clean the case of the old glue, the new battery will not fix well. Solution: remove the residue with alcohol or acetone, then wipe the surface with a lilac-free wipe.

Installation of a new battery: nuances

If you have removed an old battery to replace, consider the following points when installing a new one:

1. Verification of compatibility

The battery should be original or certified for your model, for example, a Redmi Note 11 battery labeled with a battery will suit. BM4X, for POCO X3 Pro — BL-43. Non-original batteries may not fit in size or have a smaller capacity.

2. Fixing to new glue

Use double-sided tape for batteries (for example, 3M 9448A) Apply it only to the edges of the battery, avoiding the center, which will help to avoid bloating in the future.

3. Connecting the plume

Before you lock the battery, plug its plume into the motherboard and check if it's recognized by the system.

1. Connect the phone to charge (without lid installation).
2. If the charging indicator appears on the screen, the battery is connected correctly.
3. If not, check the contact of the plume for contamination.

Calibration of the new battery

After replacing the battery, perform a full charging-discharge cycle:

1. Charge the phone to 100%.
2. Turn off the charging and use until full discharge (0%).
3. Re-charge to 100%.

This will help the power controller to correctly determine the capacity of the new battery.

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If the phone discharges quickly after replacing the battery, check the energy saving settings. MIUI Go to Settings. → Battery → Battery mode and select Balanced or Performance".

When is the best time to contact the service center

Despite the detailed instructions, some situations require professional intervention.

• 🔧 Battery swelled or deformed (risk of fire when self-extracting).
• 💻 On the motherboard, traces of oxidation or damage are visible.
• 🔌 The phone does not turn on even after the battery is replaced (possible problems with the power controller).
• 🛠️ You have no experience disassembling electronics (risk of damage to plumes or displays).
• ⚡ The new battery is not recognized by the system (power controller firmware may be required).

The cost of replacing the battery in official service centers Xiaomi ranges from 1,500 to 4000 rubles (depending on the model). informal workshops may offer a lower price, but the risk of using non-original parts is higher.

If you do decide to do it yourself but you're in trouble, don't continue to disassemble by force, pick up the phone back up (if possible) and call in the experts, and the damage caused by a mishandling is often more expensive than the original battery replacement.

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Xiaomi’s official service centers offer a replacement battery warranty (usually 6 months) and the phone warranty is cancelled if you replace it yourself.

FAQ: Frequent questions about retrieving Xiaomi battery