Xiaomi’s current smartphones are designed to be as tight and compact as possible, often baffling users when trying to reach the internal components. Unlike older fold-back models, where it took seconds to replace the power supply, a non-removable battery is now an industry standard requiring a specific approach to maintenance. Trying to remove the battery without proper preparation and understanding the design of the device can cause plumes to be damaged, power cells to bloat or even fire.
Before you start to physically affect the case, you need to clearly understand that the disassembly procedure deprives you of an official warranty from the manufacturer. Most service centers immediately detect the traces of opening on broken seals or the absence of factory glue on the display frame. However, if the warranty period has expired, and replacing the battery is necessary to extend the life of the gadget, then self-performance becomes the only economically viable solution for the owner.
It's important to understand that the term "non-removable" in the context of modern Redmi and Poco means only the lack of user access, but not the impossibility of replacement in principle. Engineers use special adhesives and screws under custom hats to protect the insides from dust and moisture, and prevent accidental extraction. Your task is to carefully overcome these barriers using the right set of tools and following a strict sequence of actions described below.
Preparation of the workplace and necessary tools
The success of a battery recovery operation depends on 90% of the quality of the workspace preparation, you need a clean, well-lit table with antistatic coating or just a wooden surface free of unnecessary objects, you can not start working on soft fabrics or carpets, because it is easy to lose tiny screws that can roll into the pile and become inaccessible.
The main tool will be a set of precision screwdrivers, including bits like Phillips #000 and, critically for Xiaomi, a star-shaped Torx T5 or T6. Many users make the mistake of trying to twist screws with conventional cross screwdrivers, which leads to the licking of the faces and the inability to further disassemble without drilling the hats.
☑️ The master's toolkit
To soften the adhesive layer holding the back panel, you need a heat source. Professionals use the thermophene, setting the temperature around 80-90 degrees, but at home, a conventional electric heating pad or even an iron heated through a dense towel. Do not use open fire or microwave ovens, as uneven heating can damage the display matrix or cause a battery explosion.
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Use isopropyl alcohol to dissolve the glue - it does not conduct current and quickly evaporates, leaving no traces on the board.
Algorithm of safe disassembly of the smartphone Xiaomi
The first step should always be to completely turn off the device. Working with electronics under voltage, even with the screen turned off, carries the risk of short circuit, especially if the display plume or battery connector is affected during the disassembly. SIM-cards so as not to damage its mechanism when heating the body.
The heating process requires patience: warm the back cover evenly for 3-5 minutes, constantly moving the heat source around the perimeter. Don't concentrate hot air at one point, otherwise the back plastic may warp or change color. Periodically check the temperature with your finger - the body should become hot, but not burning.
After warming up, insert a thin plastic mediator or a special suction cup into the gap between the frame and the lid. Carefully guide the tool along the perimeter, feeling the resistance of the glue. If the lid does not respond, do not use force, but add a little more heat. Sharp movements can lead to cracks in the glass, especially in the corners where the glue freezes most.
⚠️ Warning: If you hear a characteristic crack or see the glass start to crumble, stop the exposure immediately.This could mean that the glue has not warmed up or the structure of the glass has already broken.
Once the lid is removed, you will see the interior of the smartphone, where the battery usually occupies the center part. In some models, such as the Xiaomi Mi Note or the old Redmi Note series, plumes can be placed under the battery that go to the bottom board, so you need to remove them with extreme caution, snapping connectors with a plastic blade.
Specificity of battery extraction in different models
Xiaomi and its Redmi and Poco sub-brands vary in design depending on year of release and price segment. Budget models with plastic body often use double-sided perimeter tape, which is relatively easy to remove after heating, while flagship devices with glass or ceramic backs require a more delicate approach due to the fragility of the materials.
Particular attention should be paid to models of the Redmi Note series (for example, 8, 9, 10 Pro), where the battery can be glued not only at the edges, but also have additional latching strips in the middle. In such cases, it is recommended to use special stretching strips iFixit or simply a tight thread, which is carried under the battery with sawing movements.
The metal-body devices that were found in the Mi 4, Mi 5 ranges have a large number of screws around the perimeter of the middle frame, and it is important not to confuse the length of the screws when reassembled, since screwing a long screw into a short hole can break the motherboard and put the phone out of action forever.
The table below provides information about the types of battery attachment in popular series, which will help you plan your disassembly tactics in advance:
| Device series | Case material | Type of AKB anchorage | Difficulty |
|---|---|---|---|
| Redmi Note 8/9/10 | Glass/Plastic | Perimeter glue | Medium |
| Xiaomi Mi 9/10/11 | Glass. | Strong glue + screws | Tall. |
| Redmi 9A/10A | Plastic. | Double-sided scotch | Low. |
| Poco X3/NFC | Plastic. | Sticky stripes. | Medium |
Technology for Removing Old Battery
The most critical thing is to physically remove a swelled or just old battery, and if the battery is swelling, it takes up more space than the design would require, and the pressure on the body can be significant, and you can't push the battery or stick it with tools, because the contact of lithium with oxygen causes instantaneous ignition.
The ideal way is to use isopropyl alcohol: apply 2-3 drops of liquid under the edge of the battery, wait 30-60 seconds for the alcohol to penetrate the adhesive layer, and gently lift the edge with a plastic spatula. Repeat the procedure throughout the area until the battery starts to move freely.
If you don't have alcohol on hand, you can use the thread method, take a strong dental floss or fishing line, run it under the top edge of the battery, and hold the ends, move the thread down, making cross-sectional movements, like sawing, which allows you to cut the adhesive layer without damaging the adjacent components.
What to do if the battery is stuck dead?
When extracting, be sure to hold other components, such as vibrator motors or plumes, with your finger or tweezers so they don't pop out of their seats.The vibromotor in Xiaomi smartphones is often mounted simply on double-sided tape next to the battery and can easily shift when snatched.
Installation of a new battery and assembly of the device
Before installing a new battery, you need to thoroughly clean the seat of the residue of old glue. Use a plastic card or spatula to scrape off large pieces, and then wipe the surface with a napkin soaked in alcohol. The surface should be perfectly smooth and fat-free for the new element to be firmly fixed.
New batteries often come with an already applied adhesive layer, a closed protective film. If there is no adhesive, use special B-7000 adhesive strips or double-sided electronics tape. Never use superglue (Cyanocrylate) or Moment glue, as they emit fumes that settle on the camera lenses and make them cloudy, and can damage the plastic insulation of the battery.
After installing the battery and connecting the plume, take your time to close the lid. First, check the device's performance by turning it on. Make sure the phone responds to charging, the touchscreen is running, and there are no errors in determining battery capacity. Only after a successful test can you apply a new glue to the frame and press the back panel.
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The main secret of successful assembly is not to save on glue and let it grip under load for 1-2 hours before the first inclusion.
Typical errors and precautions
One of the most common mistakes is ignoring battery bloating: many users continue to use the phone with a “bubbling” battery, not realizing that this is a sign of an irreversible chemical reaction.
It is also common to see damage to the display plume when the back cover is not removed neatly. In modern Xiaomi smartphones, the plume can go through the entire body or have a complex trajectory. Always study the teardown of your particular model in specialized forums before work begins.
⚠️ Warning: Never use metal tools (knives, needles) to tamper with the battery.The metal can close contacts on the battery itself or damage the power controller on the board.
Another mistake is the use of non-original or cheap battery analogues. The market is flooded with fakes that can have a declared capacity of 4000 mAh at real 1500 mAh. These batteries degrade quickly, warm up and can swell again after a month of use. Buy components only from trusted rated suppliers.