How to remove the battery from the phone Xiaomi: instructions with photos and videos

Removing the battery from a Xiaomi phone is a challenge that owners face when replacing a battery, repairing a motherboard or eliminating bloating. The brand’s current smartphones (including the Redmi series, POCO and the flagship Mi/Xiaomi) are equipped with non-removable batteries attached to double-sided tape or glue, which complicates the process, but makes it feasible even at home – with the right tools and knowledge.

In this article, you will find step-by-step instructions for different models, a list of necessary tools, and critical warnings to help avoid damage to the phone. We will examine both classic methods (using a mediator and a hair dryer) and alternative approaches for devices with enhanced protection, special attention is paid to models with a liquid cooling system (for example, Xiaomi 12 Pro or POCO F5 Pro), where the risk of damage from careless dismantling is higher.

Preparation for dismantling: tools and security measures

Before you start removing the battery, make sure you have everything you need, and if you don't have one tool, you can permanently damage the board or the display.

• 🔧 Plastic mediator (or guitar mediator) – to separate the battery from the body.
• 🔥 Technical dryer (power 300-500 watts) - for heating glue. Household hair dryer is not suitable!
• 🛠️ Screwdriver. T3/T4 (depending on the model) - for spinning screws.
• 🧲 Suction - to remove the back cover (relevant for models with glue fixation).
• 🔋 Insulation or capron tape - for fixing plumes and preventing short circuit.
• 🧤 Antistatic bracelet (optional, but recommended) – to protect against static electricity.

Also, prepare your workspace: it should be well lit, free of dust and moisture. Use a silicone mat or soft fabric to avoid scratching the phone body. If you work with a model where the battery is soldered to the board (for example, some versions of the Redmi Note 10), you will need a soldering station and solder.

⚠️ Warning: Do not use metal tools (knives, screwdrivers) to separate the battery! This can puncture the battery and cause a fire or explosion.

Step 1: Removing the back cover

The first step is access to internal components. Most Xiaomi models use the back cover on latches and glue, except for flagship devices (such as the Xiaomi 13 Ultra), which can use screws under the lid.

Instructions:

1. Turn off the phone and remove the tray for SIM-map.
2. Heat the back end edge with a hair dryer (~60–70°C) for 1-2 minutes. This will soften the glue.
3. Place the suction cup on the top of the lid (above the speaker) and pull up.
4. Insert a plastic mediator into the resulting gap and carefully conduct them around the perimeter, separating the latches.

If the lid doesn't lend itself, don't use excessive force, it can break the latches. Re-heat the hairdryer. For models with an aluminum frame (such as the POCO F4 GT), be especially careful: the metal heats up quickly and can burn your fingers.

Step 2: Disconnect the plumes and batteries

When you take the lid off, you'll see the battery covered with a protective film, and before you touch the battery, be sure to disconnect it from the board.

1. Find the battery connector (usually located at the bottom of the board, next to the battery connector). USB-port).
2. Carefully put a plastic spatula on the connector and unplug it. Don't pull the wires!
3. If there is a metal shield on the board, unscrew it (screws can be under the seal).

On some models (e.g. Redmi 9A), the battery connector may be glued, in which case use a dryer to warm up the glue. Never pull the connector off by force, which can tear off the contact pads on the board.

⚠️ Warning: If the phone was turned on before the battery was disconnected, there is a risk of memory damage (up to data loss!

Step 3: Dismantling the battery with a mediator

Now, the most important step is to separate the battery from the body, and most Xiaomi batteries are mounted on double-sided tape or B-7000 glue.

1. Place the phone on a flat surface with the battery up.
2. Heat the surface of the battery with a hair dryer (no more than 80°C!) for 3-5 minutes.
3. Insert a plastic mediator under the battery from any angle and carefully drive it along the case, separating the adhesive layer.
4. If the battery fails, repeat the heat. Don't try to tear it off by force!

For reinforced-mount models (e.g., POCO F5), a special battery suction cup or thread (guitar string method) may be required.

• Put a thin kapron thread under the battery.
• Carefully saw it with glue, moving back and forth.
• Don’t use a metal string – it can puncture the battery!

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If the battery is swollen, do not try to heat it with a hair dryer, this can cause fire.

Step 4: Features for liquid-cooled models

Xiaomi’s flagship devices (e.g., Xiaomi 12S Ultra, POCO F4 GT) are equipped with a liquid cooling system where the coolant pipe passes under the battery, and if it is not neatly dismantled, it can easily be damaged, leading to fluid leakage and the phone fails.

How to avoid problems:

• 🔍 Before heating, study the layout of the tube (can be found in disassemblies on YouTube).
• 🌡️ Do not heat the hair dryer for longer than 2 minutes - high temperature can deform the tube.
• 🛑 If you feel resistance when the battery is separated, stop the process and check if you have hit the cooling circuit.

In some cases (for example, on Xiaomi 13 Pro) the battery is attached to the cooling tube with additional glue, where without experience it is better not to take risks and turn to professionals.

Step 5: Installation of a new battery

After successfully disassembling an old battery, you can start installing a new one, and it's important to choose an original or certified battery, because cheap ones can swell in a few months.

• For the Redmi Note 11 – BM4X (capacity 5000 mAh).
• For the POCO X3 Pro, DM40 (5160 mAh) is available.
• For Xiaomi 12 Lite – BL20 (4300 mAh).

Installation procedure:

1. Clean the seat from glue residues (you can use isopropyl alcohol).
2. Remove the protective film from the new battery and glue it to the place, starting at the top edge.
3. Connect the battery connector to the board, make sure the contacts are not bent.
4. Secure the battery with tape or glue (e.g. B-7000).
5. Collect the phone in reverse order, checking the density of the lid.

⚠️ Warning: After the battery is replaced, the phone may show an incorrect charge level, due to the calibration of the controller. To reset it, completely discharge and charge the phone 2-3 times in a row.

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Using a non-original battery can result in a denial of warranty service even if the phone has not been repaired before.

Frequent Mistakes and How to Avoid Them

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

• 🔋 Battery plume damage – always turn off the connector with a plastic blade, not with your fingers.
• 🔥 Overheating board with a hairdryer - keep the hairdryer at a distance of 5-10 cm and do not direct the air flow to the chips.
• 💥 Puncture of the battery - if you notice bloating, do not try to remove it yourself. A bloated battery can ignite when mechanically exposed.
• 📱 Losing screws - use a magnetic mat or fastener container.Strolts in Xiaomi often differ in length!

Another common problem is that the lid doesn't fit tightly after assembly, and that happens if you don't clean the glue or fix the latches incorrectly, and then the phone can make creaks or collect dust under the lid.

FAQ: Answers to popular questions