Xiaomi smartphone owners often face the need to replace or remove the battery, which can be caused by natural wear, bloating of the battery or the desire to replace it with a more capacious counterpart. Modern models of the Chinese brand, like most flagships on the market, are equipped with non-removable batteries, which complicates the process of accessing internal components of the device.
The procedure requires not only physical effort, but also technical knowledge. Mishandling Li-Ion batteries can lead to serious consequences, including fire or failure of the motherboard. In this article, we will discuss in detail how to safely get the battery, what tools will be needed for this, and why manufacturers abandoned removable batteries.
Before starting disassembly, you need to realize that opening the case automatically deprives you of warranty service. If your smartphone is still under warranty, we strongly advise you to contact an authorized service center. Self-intervention is justified only if you are confident in your abilities or official support is no longer available.
Why Xiaomi can’t just remove the back cover
The era of smartphones, where replacing the battery required only removing the back cover and removing the battery, is gone forever. Xiaomi engineers, following the global trend, switched to all-metal and glass cases to improve ergonomics and heat sink, which means that the battery is now part of the internal design, fixed on adhesive basis.
The abandonment of removable batteries allowed for an increase in the usable volume inside the enclosure, which made it possible to install a larger board, a main camera module with optical stabilization, or, most importantly for the user, a larger battery, but this arrangement makes the process of extracting the energy element laborious.
Also, the tight layout of the internal components requires special care: the plumes of the display, camera module and buttons often pass directly above the battery or are attached to it. Careless movement can lead to the breakage of thin conductors, which can only be restored by an experienced master with a microscope.
- 🔋 Tight layout requires a complete disassembly of the device to access the battery.
- 🧪 Use of special glue to fix the lid and battery inside the case.
- 📱 Risk of damage to the plumes of the display with careless opening.
Necessary tools for safe disassembly
To successfully complete the task, you will need a specialized set of tools: Attempting to open a Xiaomi smartphone with a knife or screwdriver in the eye with a probability of 99% will damage the case or screen.
The dryer is a critical tool. The glue that holds the back cover and the battery itself softens when heated. Without heat, you risk shattering the glass or bend the metal frame. The optimal heating temperature is about 80-90 degrees Celsius, you need to keep the hair dryer at a distance of 5-10 cm.
Also, make sure to prepare a container for small screws. Xiaomi smartphones use screws of different lengths for different nodes. If you confuse them when you build them, you can damage the internal components or leave gaps in the case. Tweezers with curved ends will help extract small parts from the depths of the case.
- 🌡️ Hair dryer or heating plate for softening the adhesive layer.
- 🛠️ A set of precision screwdrivers (usually cross-shaped) PH000 Torx).
- 🧤 Plastic blades and suction cup for careful separation of the cover.
☑️ Preparation of the workplace
Preparing the smartphone for the extraction of the battery
The first and most important step is to discharge the device. Working with a fully charged lithium battery is dangerous: if the shell is accidentally damaged or punctured, such a cell can ignite with high temperature. It is recommended to discharge the Xiaomi smartphone to a turn-off or level of 15-20%.
After turning off the device, you need to remove the tray. SIM-It's standard, but it's often forgotten, and if you try to open a case with a tray mounted, you can damage the mounting mechanism or the frame of the smartphone itself.
Heat back cover should be uniform. Warm up the perimeter of the device during 2-3 Do not hold the hair dryer in one spot for too long to avoid overheating the display, especially if you have a model with a silhouette. AMOLED-matrix sensitive to high temperatures.
⚠️ Warning: Never try to lid while it's hot.The glue needs to be heated, but the body itself needs to be warm, not scalding, so as not to get burnt to the hands and melt the plastic elements inside.
The process of opening the case and disconnecting the plumes
Once you warm up, apply a suction cup to the bottom of the back cover and pull up slightly to create a gap. Insert a plastic mediator into the gap, drive the instrument along the perimeter, cutting the adhesive layer. Metal tools can't be used here, they can break the glass.
When the lid is removed, you'll see the inside of the smartphone, and the first thing you need to do is to disconnect the battery from the motherboard, and to do that, remove the plastic slat that normally covers the connectors, and it can be mounted on screws or latches.
Use a plastic blade to turn off the battery plume, the movement must be directed away from itself or upwards, but not sideways, so as not to break the connector, and only after the battery is physically turned off, you can continue disassembling further, removing other modules.
- 🔌 Disabling the battery plume is a priority before removing other components.
- 🧩 Removing protective screens requires care so as not to damage small latches.
- 👁️ Visual inspection for battery bloating before further manipulation.
What to do if the lid does not open?
How to remove the glued battery
The most difficult step is to extract the battery itself. In Xiaomi smartphones, the battery is glued to the frame with bilateral tape throughout the area. Pulling the wires or trying to tamper with the battery with a screwdriver is strictly prohibited, this will damage the shell and possible fire.
There's a proven method that uses floss, and you can use a strong dental floss or a special string to repair it, and you can use it on the top of the battery (where it's already a little bit out of place or there's a gap), and you can use the floss left-right, like a saw, to gently cut the glue underneath the battery.
If you have a display plume under the battery (which is common in modern models), use the thread very carefully, controlling the depth of the dive. An alternative method is to use special suction cups for batteries, but they only work if there is at least some protrusion that you can catch.
⚠️ Warning: If you damage the battery shell during recovery and smell a strong chemical smell or smoke, stop working immediately. Take the device out in the open or in a metal container with sand!
Table of compatibility and complexity of disassembly of models
Different Xiaomi models have varying degrees of disassembly complexity, some series are easier to disassemble due to the presence of technological holes or less aggressive glue. Below is a comparative table of the difficulty of extracting the battery for popular series.
| Smartphone series | Type of back cover | Difficulty | Feature of attachment |
|---|---|---|---|
| Xiaomi Redmi Note (old) | Plastic. | Low. | Latches, minimal glue |
| Xiaomi Mi (flagships) | Glass/ceramics | Tall. | Strong perimeter glue |
| POCO X/F Series | Plastic/Glass | Medium | Screws under stickers |
| Xiaomi 11/12/13 | Glass/Eco-skin | Very high. | Double-sided tape for the entire area |
As you can see from the table, owners of older models with a plastic cover are more fortunate. Owners of flagship lines with glass rear panels will have to spend much more time on careful warming up and peeling off. Always check with specific manuals for your model, as even within a series of layouts can change.
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The main difficulty in extracting the battery in Xiaomi is a powerful adhesive layer that requires heating and careful work with a thread or string, rather than physical strength.
Installation of a new battery and assembly of the device
Once the old element is removed, you need to clear the seat of glue residues. Use isopropyl alcohol and a plastic card. The surface must be perfectly clean and fat-free, otherwise the new battery will not be fixed reliably and may shift during operation.
Apply a special B-7000 glue to the new battery and seat, or use ready-made adhesive strips (they often come with quality batteries).Let the glue dry slightly (1-2 minutes), then gently set the battery in place, avoiding skewing.
Connect the battery plume to the motherboard before you close the case. Press the power button to make sure the device is responding and charging. If everything is working, turn off the battery again, complete the assembly of the case, and then plug the plume permanently for inspection.
- 🧹 Careful cleaning of the frame from old glue is the key to a smooth landing of the new battery.
- 🔋 Initial health check before final sealing of the body.
- ⏳ Time to dry glue B-7000 This is about 24 hours for complete polymerization.
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To fix the new battery, instead of the B-7000 liquid glue, it is more convenient to use ready-made bilateral adhesive tapes cut into the shape of the battery, which will simplify future replacements and reduce the risk of glue hitting the plumes.
⚠️ Warning: Do not turn your smartphone on to the network for quick charging immediately after replacement. 10-15 minutes the device should just lie down with the battery connected so that the power controller is calibrated, and the glue grabbed.
Frequent errors when replacing the battery
One of the most common mistakes is to ignore battery bloating, so if the battery is swelling, it can't be pierced or bent, and many users forget to turn off the battery plume in the first place by continuing to spin the screws next to the battery connected, which creates a risk of short circuit.
Another mistake is using superglue (cyanacrylate) instead of elastic glue for electronics. Superglue crystallizes and crumbles over time, and its vapors can settle on cameras and sensors, disabling them. For Xiaomi smartphones, only specialized formulations are suitable.
Don't try to force the battery into a battery, because if it doesn't fit, you either chose the wrong model or you didn't completely clear the frame of the old glue, and the mechanical pressure on the lithium cell is dangerous and can cause the internal circuit to close.