How to Remove a Battery from a Xiaomi Phone: Safe Disassembly for All Models

Xiaomi’s current smartphones, from the low-end Redmi to the flagship Mi and POCO, are designed with compactness and reliability in mind. However, sometimes users need to remove the battery to replace, diagnose or repair after a fall. If your phone stops turning on, battery discharge preceded by a bump or bloating of the body, the procedure becomes not just desirable, but critically necessary.

But here’s the big problem: most Xiaomi models after 2016 are equipped with non-removable batteries, attached to the adhesive base. This means that to access the battery you have to disassemble the case, which is fraught with the risk of damage to the plumes, display or the board itself. In this article, we will discuss how to remove the battery from the Xiaomi phone of different generations, from the old Redmi 3S with a removable lid to the newest Xiaomi 14 with a monolithic design.

⚠️ Warning: If the battery is swollen (the phone body is "unspoiled" or there are gaps between the screen and the frame), do not try to remove it yourself - the risk of fire or chemical burn is extremely high. In this case, take the device to a service center immediately or place it in a non-combustible container (such as a metal jar) outdoors.

1.Preparation: What it takes to retrieve the battery

Before you start disassembling, make sure you have everything you need, and if you don't have the right tools, you can damage the latches of the case, scratch the screen, or even short circuit the board.

• 🔧 Plastic blades/mediators (to unscratch the body) Metal screwdrivers cannot be used, they conduct current!
• 🔨 Cross screwdriver (usually) PH00 or PH0 Xiaomi screws).
• 🧲 Magnetic mat or screw tray (so as not to lose small details).
• 🔥 Dryer or thermal air station (for softening the glue of non-removable batteries).
• 🧴 Isopropyl alcohol (90%+) — Cleaning contacts and removing glue residues.
• 🛡️ Gloves and safety glasses (when working with a bloated battery).

If you are disassembling the phone for the first time, we recommend you also purchase a special kit for repairing smartphones (costs from 500 rubles on AliExpress or Wildberries), which usually includes all the necessary tools, including screen suction cups and tweezers.

⚠️ Warning: Do not use knives, scissors or other sharp objects to lash the lid! Even a small scratch on an aluminum frame can become a source of corrosion, and damage to the display plume will lead to irreversible damage to the screen.

2. Determine the type of battery: removable or non-removable

How you extract the battery depends on the design of your Xiaomi, and all models can be divided into three categories:

To find out what type of battery is in your model, check:

1. There are visible seams between the back cover and the frame, and if you have a seam, the lid is removable.
2. Manufacturer's instructions (on the official website of Xiaomi in the "Guidelines" section).
3. Video disassembly on YouTube (see "Teardown phone model").

⚠️ Note: In wireless charging models (e.g. Xiaomi Mi 11 Ultra or Redmi) K40 Pro+) The battery is often further fixed by a metal plate, and to remove it, you need to turn 4-6 screws away. Y00 (star).

3. Step-by-step instructions for phones with removable lid

If your model is in the first category (see table above), the process of removing the battery is as simple as possible.

1. Turn off the phone and remove it. SIM-card/memory card (if any).
2. Place the nail or plastic shoulder blade in the gap between the lid and the body (usually at the bottom, next to the charging connector).
3. Carefully slap the lid and remove it. If you feel resistance, check if there are any hidden latches (for example, in Redmi 3S they are located on the sides).
4. Under the lid, you'll see a battery, usually with a plastic latch or a sticky tape, and disconnect the battery connector from the motherboard (marked as BATT or Battery).
5. Put a plastic spatula on the battery and remove it.

✅ Tip: If the battery is "stuck" to the body, do not pull it by force - moisten the cotton swab with isopropyl alcohol and gently swipe around the edges. Alcohol will dissolve the glue in 10-15 seconds.

Is the phone off?|Whether extracted SIM-map?|Are there plastic shoulder blades?|Is the propeller space ready?|Is the battery type checked (removable/non-removable)?-->

Disassembly of phones with a fixed lid (Redmi Note 5–9, Mi 8–10)

And here, the process gets complicated, because the lid is glued around the perimeter, and the battery is additionally fixed with glue or double-sided tape, and the main danger is damage to the plume of the display or the separation of antenna contacts.

Step 1. Heat the body.

Use a dryer at minimum power (temperature) ~60°C) or a thermo-air station. Warm up the edges of the phone for 2-3 minutes, evenly wielding a hairdryer along the seam.

Step 2. Separate the cover

Insert a plastic blade into the gap between the screen and the back cover (start at the bottom edge where the charging connector is). Carefully drive the blade along the body, separating the latches. If the lid does not respond, warm it up for another 1-2 minutes.

Step 3. Shutting down the battery

When you take the lid off, you'll see the battery locked with a metal plate or a black film, turn the screws away (if you have them), and disconnect the battery connector from the board. Important: Use plastic tweezers to keep the contacts from closing!

Step 4: Battery extraction

If the battery is glued, put a plastic spatula on the side and slowly pull it up. When resisting, drip the isopropyl alcohol under the battery (not for a charge!). For convenience, you can use a suction cup, but don't put it to the center of the battery - only to the edges.

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If the adhesive is too strong, try pulling carefully on special ears (white or black ribbons under the battery) that are found in most Xiaomi models after 2018.

5. Features of dismantling flagships (Xiaomi 11-14, POCO F4-F5)

In the latest Xiaomi models, the battery is often integrated into the cooling system (for example, in the Xiaomi 12S Ultra or POCO F4 GT).

• 🔧 Turn away additional screws under the metal plate (usually 4-6 pieces).
• 🧊 Carefully disconnect the heat pipes (they can be soldered to the battery).
• 🔋 Use a special glue solvent (for example, B-7000), if the battery does not separate.

⚠️ Note: In dual-battery models (e.g. Xiaomi Black Shark 4 Pro), the power connectors can be hidden under additional plumes. Don't disconnect both batteries at the same time - this can cause resetting of settings. NVRAM (IMEI).

📌 Key conclusion:

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In Xiaomi flagships after 2021, the battery is often connected to a cooling system. Disassembly requires not only tools, but also knowledge of the layout of the plumes.

6.What to do after the battery is removed

Did you get the battery out?

1. Clean the contacts on the board and battery with a cotton swab dipped in isopropyl alcohol.
2. Check the integrity of the plumes (especially the display and cameras) if damage is noticeable, do not turn on the phone until repaired.
3. Dispose of the old battery in special reception points (do not throw it into ordinary garbage!).

If you've removed the battery from the bloating, check the charge for signs of corrosion or oxidation.

• 📱 Display module (appearance of vertical stripes).
• 📡 Antenna contacts (network or Wi-Fi problems).
• 🔌 Charging connector (phone not charged).

✅ Tip: After you change the battery, calibrate the power controller:

1. Charge your phone to 100% and hold on charging for another 1 hour.
2. Turn off the charge and discharge to 0% (until it turns off).
3. Repeat the cycle 2-3 times.

7. Frequent mistakes and how to avoid them

Even experienced users sometimes make disassembly mistakes, and here are the most common ones and ways to prevent them:

📌 Key conclusion:

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90% of the damage to Xiaomi’s demolition is due to haste or the wrong tools.

FAQ: Answers to popular questions