Removing the battery from a Xiaomi phone is a challenge that owners face when replacing the battery, repairing the motherboard or after getting moisture. Unlike older “clamshells” with removable covers, modern Redmi, POCO or Mi smartphones require accuracy: the battery is glued to the body, and its improper removal can damage the plumes or the board itself. This article will help you understand how to remove the battery safely, what tools you will need, and what to do if the battery is swollen or deformed.
It's important to understand that the process varies depending on the model. For example, the Xiaomi 11T Pro has a battery on double-sided tape, and the Redmi Note 10 has additionally soldered contacts of the temperature sensor. We'll look at the universal steps that are suitable for most devices, as well as the nuances for specific lines. If you've never taken out smartphones, you better contact the service center, because the risk of damage is high.
Preparing for battery removal: tools and safety
Before you start, make sure you have everything you need, the main instrument is a plastic transmitter (or guitar) 0.2-0.4 mm thick. You can't use metal blades, they can puncture the battery, which will lead to a fire.
- 🔧 Torx screwdriver T3/T4 Pentalobe (depending on the model)
- 🧲 Screen suction cup (optional, but simplifies the process)
- 🔥 Hair dryer or thermo-air station (for softening glue)
- 🧴 Isopropyl alcohol (90%+) glue-cleaner
- 🛠️ Gloves and safety glasses (the battery contains caustic substances)
If the battery is swollen, do not heat it with a hair dryer, this can cause a rupture, in which case you should immediately contact the service, also check the charge of the device: if it is below 25%, connect the phone to charge for 10-15 minutes, a fully discharged battery can "go to defense" and not show signs of life after installation.
⚠️ Warning: Never use a knife or sharp objects to smack the battery. Lithium batteries are sensitive to punctures and can ignite even from a spark of static electricity.
Step-by-step: how to remove the battery from Xiaomi
The process begins with the rear cover being removed, and most Xiaomi models have it glued, so you'll need a hair dryer. Heat the edges of the body around the perimeter for 2-3 minutes (60-70 temperature).°C), then gently apply the lid to the plastic mediator. Start at the bottom edge where the connectors are located. SIM-cards, the glue is usually weaker there.
Once you remove the lid, you'll see a battery that's locked in black tape or glue, and the first step is to disconnect the power plume from the motherboard, which is located under a protective film or a metal screen, and use tweezers to gently lift the connector lock (usually white or orange), then pull the plume out.
☑️ Preparation for battery removal
Now, to the battery itself, put it on any corner with a plastic mediator, trying not to touch the metal parts of the case. If the battery does not respond, heat it with a hair dryer (maximum 50°C!) for 1-2 minutes. The glue will become softer, and it can be gently lifted. Don't pull too much - under the battery there are camera and sensor plumes!
| Xiaomi model | Type of battery attachment | Features |
|---|---|---|
| Redmi Note 10/11 | Double-sided scotch | Easy to remove after heating, the temperature sensor plume is soldered to the board. |
| POCO X3 Pro | Glue + fixers | It requires a lot of heat. There's an NFC antenna under the battery. |
| Mi 11 Ultra | Glue + metal frame | Difficult dismantling. It's recommended to use a suction cup for the battery. |
| Redmi 9A/9C | Scotch without additional fixings | The simplest replacement. The battery is removed without heating. |
⚠️ Warning: If the battery starts to make hissing sounds or heats up above 40°C -- stop working immediately, take the phone outside and wait for it to cool down.
What to do if the battery is too tight?
In some models (for example, Xiaomi Mi 10T or POCO F3), the manufacturer uses heavy-duty glue that does not respond even after heating. In such cases, isopropyl alcohol will help. Carefully drop a few drops under the edge of the battery and wait 1-2 minutes - the alcohol will dissolve the glue without damaging the electronic components.
If there is no alcohol, you can use 3M General Purpose Adhesive Remover. Do not use acetone or petroleum-based solvents in any case, they will damage plastic parts and rubber seals.
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If the battery doesn't go away even after heating, try pulling on the special ears under the tape, which are found in most Xiaomi models, but are often hidden under the adhesive layer.
Another way to do this is to use a kapron filament, which is to thread under the battery and gently saw it as you move it from side to side, and this is a method that requires patience, but minimizes the risk of damage to the plumes.
How to remove the battery from Xiaomi if it is swelling?
A bloated battery is extremely dangerous, and lithium batteries can explode or ignite when deformed, so you need to be careful, and the first signs of bloating are that the phone's body is starting to blister, the screen is up, or you can see bumps under the lid.
The algorithm of actions is as follows:
- 🚫 Don't heat the battery with a hairdryer.
- 🛑 Do not try to puncture or squeeze it.
- 🔋 Turn off your phone and leave it in a ventilated room for 24 hours (if possible).
- 🔧 Contact the service center marked "bloated battery" - many workshops take such devices as a priority.
If you do decide to remove the battery yourself, work with safety glasses and gloves, outdoors or at an open window, put your swollen edge on a plastic mediator and slowly lift it, avoiding sudden movements, and if the battery starts to make noises or smoke, immediately step back and call the fire department.
What to do if the battery is smothered?
Installation of a new battery: nuances and verification
After successfully removing the old battery, clean the seat of glue residues with isopropyl alcohol. Make sure there is no damage or oxidation on the board - if there is, gently clean them with a blower or a special contact cleaner liquid.
When installing a new battery:
- 🔌 Connect the power plume to the motherboard last (fix the battery first).
- 📏 Check that the battery lays flat, without distortions.
- 🔥 Use a new double-sided tape (usually comes with a battery).
- 🔋 Charge your phone 50% before your first check – this calibrates the power controller.
After assembly, turn on the phone and check:
- Does the battery charge display correctly (without jumps)?
- Is there any overheating in the battery area?
- Does fast charging work (if supported)?
⚠️ Note: If the battery is discharged in a few hours after replacement or the phone is turned off at 20-30% charge, the power controller on the motherboard is most likely damaged.
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Always buy batteries with an original power controller, and cheap ones can not only fail quickly, but also damage the motherboard.
Frequent Mistakes and How to Avoid Them
Even experienced craftsmen sometimes make mistakes when replacing batteries.
- Screen plume damage occurs when you push too hard on the mediator when you remove the lid. Solution: Use a screen suction cup and heat the body evenly.
- The temperature sensor contact break is relevant for models with soldered sensors (for example, Redmi Note 9 Pro). Solution: solder carefully or use a battery with already soldered sensor.
- Overheating the battery -- if you heat it too long with a dryer, the glue can dry even harder. Solution: warm it in short intervals of 30 seconds.
- Wrong calibration: After you change the phone, it shows the wrong percentage of charge. Solution: completely discharge and charge the battery 2-3 times.
Another common problem is that the phone doesn't turn on after it's replaced.
- 🔌 The battery plume is not connected (check the connector locker).
- 🔋 New battery discharged "to zero" (plug to charge for 10-15 minutes).
- 🛠️ Maternity board damaged (diagnosis needed).