Removing the battery from a Xiaomi smartphone is a challenge that owners face when replacing the battery, repairing after falling or getting moisture. Unlike older phones with removable covers, modern Redmi, POCO or Mi models have an indissoluble body where the battery is glued to the rear panel. This complicates the process, but does not make it impossible. The main thing is to act carefully so as not to damage the plumes, board or battery itself, which, if handled carelessly, can ignite.
In this article, we will analyze the step-by-step algorithm for different Xiaomi models, list the necessary tools and tell you how to avoid typical errors. We will pay special attention to safety measures: working with lithium-ion batteries requires caution, since short circuits or mechanical damage can lead to thermal acceleration and fire. If you are not sure about yourself, you should contact a service center.
Preparation: security tools and measures
Before you start disassembling, make sure you have everything you need, and without the right tools, you risk damaging the body, the plumes, or even yourself.
- 🔧 Plastic blades (mediators) - for careful liding and disconnection of plumes.
- 🔨 A thin screwdriver (cross and flat) - for twisting screws.
- 🔥 Thermoclee or hair dryer – to soften the battery-locking glue.
- 🧤 Gloves and safety glasses – to protect against possible fragments and chemical reactions.
- 📦 Container for screws - so as not to lose small details.
Pay special attention to battery discharge. Before removing the battery, discharge the phone to 20-30%, which will reduce the risk of fire if you accidentally circuit. If the phone does not turn on but the battery is charged, wait 24 hours, during which time it will partially discharge naturally.
⚠️ Warning: Never use metal objects to tamper with the battery, which can break through the battery shell and cause a short circuit.°C to avoid damage to internal components.
Step 1: Removing the back cover
The first step is to separate the back from the body. Most Xiaomi models have it glued, so it will take patience. Start by heating the edge of the phone with a hairdryer (hold 10-15 cm away) for 1-2 minutes. The heat will soften the glue, and the cover will move more easily.
Then take a plastic blade and gently tuck the lid on the side where the volume buttons are located. Once there is a gap, swipe the shoulder blade around the perimeter, gradually separating the panel. Be careful - under the lid are the plumes of the fingerprint scanner (in models with a sensor on the back panel) and NFC-antennae.
Turn off the phone from charging|Delete SIM-memory-card|Wear gloves|Prepare the workplace (clean surface, good lighting)-->
If the lid doesn't lend itself, don't put too much effort into it -- you better warm up the problem area again. In the POCO F3 or Redmi K40, the lid can sit particularly tightly because of the extra latches, and the suction cup that you use for the screens will help.
Step 2: Disconnecting the plumes and batteries
When you take the lid off, you'll see the battery covered with black film, and before you touch it, disconnect the battery from the motherboard.
- Find the battery connector (usually located at the top of the board, next to the camera).
- Carefully tuck it in with a plastic spatula, pulling it up. Don't use metal tools!
- Make sure that the contacts are not closed - you can put a piece of tape.
Now you can start removing the battery itself. In most Xiaomi models, it's glued to the body with double-sided tape or special glue. To remove it, pull the black thrust tape (if you have one), or use a plastic card to gently tuck the battery off the edge.
⚠️ Warning: If the battery is swelling, do not puncture it! Bloating indicates a malfunction, and any mechanical impact can lead to fire or explosion.
What to do if the thrust ribbon breaks?
Features of battery extraction in popular models
The battery design in different Xiaomi ranges may differ, and the following are key nuances for the most common models:
| Model | Type of battery attachment | Difficulties | Advice |
|---|---|---|---|
| Redmi Note 10/11 | Double-sided Scotch + glue | Thin plumes of the camera and fingerprint sensor | Use a 0.2 mm thick blade to avoid damaging the plumes. |
| POCO X3/X4 | Glue + additional latches | The cover is tighter than that of Redmi. | Warm up the hair dryer longer - up to 2-3 minutes on each edge |
| Mi 11/12 | Glue + metal frame | Battery glued very tightly, risk of damage to charging plume | Use a special glue solvent for batteries |
| Redmi 9/9A | Scotch without extra glue | The tape pulls often break | Pull the battery from the corner where the connector is located. |
In the POCO F3 and Xiaomi 11T, the battery can be soldered to the board — in this case, you can't do without a soldering iron. If you can't solder, you should leave the repair to the professionals. Also, pay attention to the flexible graphite pads under the battery, which are easy to damage, and they are responsible for the heat sink.
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If the battery sits too tight, try putting the phone in the freezer for 10-15 minutes (in a bag to keep the moisture out of the bag). The cold will make the glue more brittle and the battery move easier. But don't overdo it - condensation can damage the board!
What to do after removing the battery
When the battery is finally removed, inspect it for damage:
- 🔋 Bloating is a sign of malfunction, such a battery cannot be used.
- 💥 Traces of oxidation on contacts - stripping with alcohol is required.
- 🔥 Darkening or smell of burning – the battery is to be disposed of.
If you are planning to install a new battery, make sure it is compatible with your model. For example, a 5020 mAh battery for the Redmi Note 10 Pro will suit, and a 5160 mAh battery for the POCO X3 NFC. Before installing the new battery, clean the case of glue residue with isopropyl alcohol and apply a new double-sided tape.
When you connect a new battery, first connect the connector to the board, and then gently put it in place, pressing it from the center to the edges, this will help avoid distortions and damage to the plumes. After assembly, check the phone for performance: it should turn on, charge and not overheat.
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Never use a battery that has been deformed or overheated, and even if it is working, the risk of a sudden fire remains high.
Common 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:
- ⚡ Forgetting to disconnect the battery from the board before retrieving it can lead to a short circuit. Always check that the connector is disconnected!
- 🔪 They use a knife or a screwdriver to tweak the battery, and the metal punches the battery.
- 🔥 Overheating the body with a hairdryer, which damages the screen and the board — 50-60°C.
- 🧲 They lose their screws or confuse them with places — Xiaomi often uses screws of different lengths.
Another common problem is that the touchscreen plume is damaged when the lid is not removed carefully, and if the screen does not respond to touch after assembly, check if the plume has moved away from the circuit board connector. In the Redmi Note 8/9 models, this plume is particularly fragile.
If the phone does not turn on after replacing the battery, check:
- Is the battery connector connected to the board?
- Are your contacts closed (use a multimeter)
- Did the charge get damaged by the heat?
When is the best time to contact the service
Despite the fact that you can replace the battery in Xiaomi yourself, there are situations when it is better to trust the professionals:
- 💀 Battery swells or leaks - the risk of fire is too high.
- 🔧 The phone does not turn on after a fall - the problem may not be in the battery, but in the board.
- 📱 Waterproof model (IP53/IP68) — After the disassembly, the tightness will be broken.
- ⚠️ You are not sure about your skills – a mistake can cost more than a service.
The average cost of replacing a battery in a service center for Xiaomi is 1500-3000 It's not that expensive, given the risks of damaging your phone when you repair it yourself, and it often gives you a guarantee for work and parts.
If you do decide to do it yourself, take a picture of each step of the disassembly, which will help you get your phone back together properly, and remember, lithium-ion batteries are dangerous, and one wrong move can lead to fire or injury.