How to properly remove the battery from the Xiaomi phone: instructions for all models

Removing the battery from a Xiaomi phone is a challenge that owners face when replacing the battery, repairing after falling or getting moisture. Unlike older devices with removable covers, modern Redmi, POCO and Mi models have a non-shatterable body, where the battery is glued to the back, which complicates the process, but does not make it impossible. The main thing is to know the sequence of actions and use the right tools.

In this article, we will discuss how to safely remove the battery from popular Xiaomi models (including Redmi Note 10/11/12, POCO X3/X4, Mi 11/12), what errors can cause damage to the board or display, and what to do if the battery is swollen. Also, you will learn what tools you will need to work and where to buy them.

Preparing for battery recovery: safety tools and measures

Before you start disassembling your phone, make sure you have everything you need, and without the right tools, you risk damaging plumes, connectors, or even piercing the battery, which can cause a fire. Here's the minimum set you'll need:

• 🔧 Plastic mediators or shoulder blades (to separate the body without scratches).
• 🔥 Dryer or thermo-air station (to soften the adhesive under the battery).
• 🧲 Screen suction cup (helps to lift the front panel).
• ⚡ Isolated screwdriver (for spinning screws).
• 🧴 Isopropyl alcohol 90%+ (glue-residue).
• 🛡️ Gloves and safety glasses (in case the battery is damaged).

Also, prepare the workspace, which should be well lit, free of dust and moisture. Put the phone on a soft substrate (like a silicone mat) so that the case doesn't scratch. If the battery is swelling, don't try to prick it or bend it, it can cause short circuits and fire, in which case it's better to take the device to service immediately.

⚠️ Warning: If the phone has been in water or has been hit hard, be sure to disconnect the battery from charging before removing it and let it stand for at least 24 hours.

Step-by-step: how to remove the back cover

The first step is to separate the back from the body, and most Xiaomi models have it glued, so you'll need heat. Here's how to do it right:

1. Turn off the phone and remove it. SIM-card and memory card (if installed).
2. Heat the back cover around the perimeter with a hair dryer for 2-3 minutes. The temperature should not be higher than 80 ° C. To avoid damaging the plastic. Keep the hair dryer at a distance of 10-15 cm.
3. Insert a plastic mediator into the gap between the body and the cover (start at the bottom edge, where the speakers are usually located). Carefully drive the tool along the body, separating the glue.
4. If the lid doesn't respond, reheat the problem area. Don't use too much force, it can break the latches.

Some models, like the POCO F3 or Redmi K40, not only have the cap attached to the glue, but also to the latches, so after heating, you need to gently pull the lid upwards, starting at the corner where the charging connector is, and if you hear a characteristic click, then the latch has opened.

Disabling the plumes and retrieving the battery

When you take off the back cover, you'll see the battery glued to the body, and in no case do not try to pull it out right away, it could break the plumes or damage the power controller.

1. Unscrew the screws that fix the metal plate over the battery connector (usually 2-4 pieces).
2. Carefully put a plastic blade on the battery socket and disconnect it from the motherboard.
3. If the battery is glued, heat it with a hair dryer (to 60°C) and squirt it with a thin spatula on the edge, and put a plastic card under it so that the cells are not damaged.

In some models (e.g. Redmi Note 9 or POCO M3), the battery is further secured with double-sided tape, in which case, after heating, it can be gently pulled by a special black tape (pull-tab), if any. If there is no tape, use a plastic scraper to slowly separate the battery from the case.

⚠️ Warning: If the battery connector is disconnected, the phone turns on or the indicator lights up, immediately stop disassembling! This means that there is power left somewhere (for example, from capacitors.

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If the adhesive under the battery is too strong, moisten it with isopropyl alcohol (a few drops under the edge of the battery), which will help dissolve the adhesive layer without overheating.

What to do if the battery is swelling

A bloated battery is a serious danger, and it can burst, emitting toxic gases, or even ignite. If you notice that the back of the phone has risen, the screen has started to move away from the body, or the device has become rapidly discharged and warmed, most likely the battery has swelled.

• 🚫 Do not try to punctur or bend the battery - this can cause a short circuit.
• 🔌 Do not connect your phone to charge or use it before the battery is removed.
• 🏥 Work in a well-ventilated room and wearing gloves.
• 🔥 Have a fire extinguisher on hand (such as carbon dioxide).

Removing a bloated battery is almost the same as normal, but it requires extreme caution: heat the body with a hair dryer (no higher than 60°C) to soften the glue, and gently tuck the battery into a plastic blade. If it does not respond, do not apply force, you better reheat the problem area. After removal, do not throw the battery into ordinary garbage - take it to the point of receiving hazardous waste.

How to avoid errors when removing the battery

Many users make the same mistakes that cause their phone to crash, and here are the most common ones and how to avoid them:

• 🔨 Using metal tools (drivers, knives) instead of plastic mediators, which can damage plumes or puncture the battery.
• 🔥 Overheating of the body with a hairdryer.°C deforms plastic and can damage the screen.
• ⚡ Unplugging the battery connector without turning off the phone, which can cause a power surge and burn the power controller.
• 🧹 Ignoring glue residues, if you don't clean the case of old glue, the new battery won't hold well.

Another common mistake is to try to pull the battery out without disconnecting the display or camera plumes, which can cause them to break down. Always disconnect the battery from the motherboard first and then start removing it. If you're not sure which connector is responsible for what, take a picture of the board before you start, which will help you plug it back in correctly.

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If after the battery is removed, the phone does not turn on, check: 1) whether the battery connector is correctly connected; 2) whether the power plume is damaged; 3) whether the short circuit protection has worked (sometimes it helps to wait 10-15 minutes).

Installation of a new battery and assembly of the phone

After successfully removing the old battery, you can start installing a new one.

1. Clean the case of glue residues with isopropyl alcohol and a lilac-free wipe. Do not use acetone or solvents - they can damage the plastic.
2. If the new battery is without adhesive, apply double-sided tape or special battery glue (e.g. B-7000) and don't overdo it, the glue can go on the board.
3. Connect the battery connector to the motherboard and gently put the battery back in place, make sure it lies flat, without skewing.
4. Close the back cover, starting from where the charging connector is located. Carefully press it around the perimeter so that the latches fall into place.

After assembly, turn on the phone and check:

• 🔋 Is the battery charged (plug the charger in).
• 📱 Are there any errors in the sensor or display.
• 🔊 Do speakers and microphone work (sometimes you can touch their plumes when assembling).

If everything is fine, let the phone run for 10-15 minutes, then turn it off and turn it on again, which will help make sure that the new battery holds a stable charge. If the phone does not turn on or quickly discharges, check the quality of the battery installation and the density of the connector.

Where to buy a battery for Xiaomi and how to choose a quality

When buying a new battery for Xiaomi, it is important not to run into a fake, because cheap batteries of unknown brands can have less capacity, wear out faster, or even pose a danger.

• 🏷️ Original packaging. The box should have the Xiaomi logo, article and hologram.
• 🔢 The battery for the Redmi Note 10 is not suitable for POCO X3, even if they look similar in appearance.
• 📦 Buy at official sites (Mi Store, AliExpress from trusted sellers) or in service centers.
• 🔋 Capacity. It must match the original one (e.g., 5020 mAh for Redmi Note 11).

The average cost of the original battery for Xiaomi is from 1,500 to 3,500 rubles, depending on the model. If the price is much lower, this is a reason to be wary. Also pay attention to reviews: users often complain about the rapid loss of capacity in non-original batteries.

FAQ: Frequent questions about retrieving the battery from Xiaomi