Modern smartphones such as the Xiaomi Redmi 8 Pro are characterized by high density of internal components, making the process of their maintenance difficult for the untrained user. Battery replacement may be required when the battery is bloated, a sharp decrease in autonomy or sudden shutdowns of the device in the cold. Although the design of the phone does not imply easy access to the power source, the procedure at home is possible with special tools and accuracy.
The process of removing the battery is fraught with risks, since the manufacturer uses adhesive glue to fix the elements, and the battery itself is often located under the motherboard or protected by additional screens. It is important to understand that any manipulation of the insides of the gadget automatically deprives you of warranty service if the warranty period has not expired. In this article, we will discuss in detail the stages of disassembly, the features of working with the adhesive base and safety.
Before starting work, you need to evaluate your skills and prepare the workplace. Static electricity can damage sensitive electronics, so it is recommended to use an antistatic bracelet or periodically touch a grounded metal object. Next, we will consider the list of necessary equipment and step-by-step algorithm of actions.
Preparation of the workplace and tools
The use of improvised tools such as knives or needles is strongly discouraged, as there is a high risk of damaging the plumes or puncturing the battery itself, which can lead to fire. You will need a set of precision screwdrivers, including a cross Phillips #00 and a flat one, as well as a suction cup to open the case.
To work with the adhesive layer that holds the back cover, you need a heat source. Thermophene or professional heating pad will soften the adhesive without overheating the display matrix. If there is no thermophene, you can use a household lamp, but the process will take longer. Also prepare a plastic blade (mediator) to crack the latches and dielectric tweezers.
- 🛠️ A set of screwdrivers with a magnetic tip for twisting screws of different caliber.
- 🔥 Thermophen or heating pad for heating the adhesive layer around the perimeter of the housing.
- 🧤 Plastic spatula and suction cup for neat opening without scratches.
Pay special attention to lighting. Small screws and thin plumes are not easily visible in dim light, which increases the likelihood of error. Organize the space so that all tools are at hand, and small parts do not roll far. Magnetic mat or a sheet of paper with markup will help not confuse the screws when you build them back.
Primary disassembly of the Redmi 8 Pro
The first step in the process to get the battery out is to remove the back cover. In the Redmi 8 Pro, it's glass and attached to a two-part perimeter glue. Start by removing the tray. SIM-So you can take the stress off the structure, and then you can carefully heat up the edges of the back panel, evenly spreading the heat.
⚠️ Warning: Do not heat the center of the smartphone, where the battery and processor are located. Prolonged heating can lead to battery bloating or damage to the display from temperature.
After heating, insert the suction cup into the bottom of the lid and pull slightly, creating a gap. Insert a plastic blade into the resulting slit and run it along the faces, cutting the adhesive layer. Move slowly so that the glass does not break. When the lid is unstuck, remove it and put it in a safe place.
Under the back cover, you can access the main board, the camera module and the battery, but unlike the older models, the battery is partially hidden under metal screens and plumes, and the first thing you need to do is disconnect the battery plume from the motherboard, and make it a plastic tool so that you don't damage the connector.
☑️ Preparation for disassembly
Dismantling components for battery access
In the Xiaomi Redmi 8 Pro design, the battery is located under the main camera module and partially covered by the motherboard. To get to it, you will need to dismantle a number of components. Start by unscrewing the screws that fix the metal protective plates above the plume connectors.
The next step is to remove the main camera module, which is large and covers a large part of the space above the battery, carefully disconnect the camera plume and remove the module from the landing site, be careful: the lenses are sensitive to dust and mechanical stress, and you may need to remove the vibrator motor and the charging port plume if they interfere with access.
| Component | Type of attachment | Risks of withdrawal | The necessary tool |
|---|---|---|---|
| Back cover. | Glue + latches | Breaking glass | Suction, spatula. |
| Protective plates | Phillips screws | Carving failure | Screwdriver #00 |
| Camera module | Trail + landing | Optics damage | Tweezers, spatula. |
| plumes | Connector latches | Contact break | Plastic spatula |
Once the obstacles are removed, the top of the battery will be accessed. However, to pull it out completely, it often requires detaching the bottom of the board or fully removing the motherboard. In the Redmi 8 Pro, the design allows access to the battery after the board has been shifted or partially dismantled, but full retrieval of the board is safer for beginners.
Do I need to completely remove the motherboard?
Technology of retrieving old battery
The most critical thing is that the battery is separated from the frame, and it's glued with a powerful double-sided tape all over the area, and just trying to pull it out will cause deformation, puncture and possible fire, and isopropyl alcohol or a special adhesive solvent (B-7000) will help soften the adhesive.
Apply a little solvent around the battery, trying not to pour liquid on the electronic components. Let the compound penetrate under the glue layer (2-3 minutes). Then use a thin plastic card or a special fishing line. Strip the fishing line under the battery and the "sawing" movements from side to side gradually separate it from the housing.
- 💧 Apply the adhesive solvent over the battery circuit to soften the adhesive.
- 🪢 Use a fishing line or a thin plastic card to “re-saw” the adhesive layer.
- 🚫 It is strictly forbidden to use metal objects for tampering with the battery.
If you feel a lot of resistance, add another solvent and wait. A puncture of a lithium polymer battery causes the electrolyte to ignite instantly, so act without rushing or sudden movements. After separation, lift the battery behind a special tongue (if any) or gently dent the edge with a plastic blade.
⚠️ Warning: If the battery starts to smoke or heat up during the recovery process, immediately place it in a container of sand or salt and take it outside!
Installation of a new power supply and assembly
Before installing a new battery, you need to carefully clean the seat of the residue of old glue. Use isopropyl alcohol and soft fabric. The surface should be perfectly smooth and fat-free so that the new adhesive layer provides reliable fixation. The new adhesive usually comes with quality batteries or is bought separately.
Stick the new battery tightly around the area. Make sure the battery plume falls freely into place without tension. Connect the connector to the motherboard before the characteristic click. Before final assembly and sealing of the lid, it is recommended to perform an initial health check.
💡
Before applying a new glue, wipe the frame and battery with alcohol - this will ensure maximum adhesion and prevent the lid from peeling off in the future.
The assembly is done in reverse order: put the camera in place, the protective plates, fasten all the screws. Make sure that no plume is clamped. The back cover before installation also needs to be cleaned of the old glue and apply a new strip of adhesive around the perimeter. Press the lid and lock with rubber bands for 15-20 minutes before freezing.
After assembly, turn on the device. The first charge should be done with the phone turned off to 100%. Calibration of the battery can take 1-2 cycles of full discharge and charge. If the phone is on and holds a charge, the operation was successful.
💡
Quality cleaning of the seat from old glue is the key to the fact that the new battery will be reliably held and effectively remove heat.
Frequent errors and precautions
Many users make mistakes in trying to save time, such as ignoring the heating of the case, which causes the window of the back cover to break when opened, another common mistake is using metal tools to turn off the plumes, which causes a short circuit.
It is also dangerous to use unoriginal or cheap batteries of unknown brands, which can have the wrong capacity, no protection controller or unusual dimensions, which will lead to swelling after a month of operation.
- 🔋 Do not use the battery if it has swelling or damage to the body.
- 🔌 Do not plug in the battery plume if the connector on the board is damaged or oxidized.
- 🧤 Work in antistatic gloves to avoid leaving traces of fat on components.
If the phone doesn't turn on after the replacement, don't panic. Check the density of the plume connection, the state of the fuses on the board and the voltage on the battery contacts with a multimeter. Perhaps the problem is not the battery, but the charge chain or the battery itself, which came to zero.