Xiaomi Redmi 4X deservedly earned the status of a legend of the budget segment due to the successful combination of metal housing and autonomy. However, even the most reliable lithium-ion batteries lose capacity over time, which leads to rapid discharge and unexpected shutdowns of the device. Replacing a worn-out battery is the most effective way to return the gadget to its former operability and extend its life.
The process of retrieving the battery in this model requires care, but does not belong to the category of super-complex repairs available only to service center engineers. The owner can perform this procedure independently if he strictly follows the technology and uses the appropriate toolkit. It is important to understand that the internal layout of the Redmi 4X has its own features, ignoring which can damage the plumes or the case.
In this article, we will take a detailed look at each step of dismantling an old battery, how to safely open the metal casing, disable the power connector, and properly remove the sticky element, and how to keep the sequence of actions to a minimum of risk and ensure successful replacement.
Preparation of the workplace and necessary tools
Before any electronic manipulations begin, a comfortable and safe space should be arranged: the table surface should be clean, flat and well lit so that small screws and details are not lost; it is recommended to use an antistatic mat or simply cover the table with a soft cloth so as not to scratch the back cover of the smartphone during disassembly.
To work with Xiaomi Redmi 4X you will need a specific set of tools, as standard screwdrivers may not fit with screws with a secret head. Particular attention should be paid to the quality of the sucker and mediators, since the metal case requires careful but confident impact for peeling.
- 🔧 Phillips (cross) size screwdriver PH00 or PH000 screw-twisting.
- 📱 Plastic suction cup or suction cup with ring for lifting back cover.
- 🎴 Plastic mediator or thin plastic card for snapping latches.
- 🔥 Hair dryer (construction or household) for heating the adhesive base around the perimeter.
- 🧤 Tweezers with dielectric tips for safe work with the insides.
⚠️ Note: Using metal tools (knives, blades) to open the body is strongly discouraged. Metal can slip and damage the display plume or break through the battery insulation, which is fraught with short circuit.
Make sure you have a screw folding container on hand, as they can vary in length and diameter in different parts of the case. Chaotic storage of the fastener will complicate the reverse assembly process and can damage the thread when screwed into a short hole.
☑️ Ready to disassemble
Primary security measures and device preparation
The first step before a physical disassembly is to turn off the smartphone completely, and this rule should not be neglected, even if the device seems to be turned off, since the MIUI operating system can have background processes that put a load on the power chain at the time of opening contacts.
If the phone has a microSD card installed or SIM-This is done with a special paper clip or a thin needle that needs to be inserted into the tray hole at the bottom of the device, and removing the tray will also make it a little easier to deform the case when removing the lid.
Heating the case is an important step that should not be ignored: the glue that holds the back panel, when exposed to temperature, becomes elastic, which reduces the risk of damage to metal or glass, you should warm up evenly throughout the perimeter, avoiding prolonged exposure to one point, so as not to overheat the internal components.
- 🌡️ Heat the body during 2-3 Periodically checking the temperature with your hand.
- 📉 Do not bring the temperature to a state where it is impossible to hold the phone in your hand.
- 🔋 Make sure the battery is at least at least charged before switching off. 20-30%, If testing is planned immediately after replacement.
⚠️ Warning: If the battery is swelling, the heating should be carried out extremely carefully. Excessive pressure or high temperature can damage the shell of the ballooned battery, which will lead to fire or release of toxic substances.
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Before starting warming up, remove the protective cover, if any, so that the heat is evenly distributed over the metal surface of the case.
Removal of the back cover Xiaomi Redmi 4X
After sufficient warm-up, you need to quickly but carefully install the suction cup at the bottom of the back panel, closer to the MI logo or slightly lower. Pull the suction cup up, creating a gap between the main frame and the decorative cover. Insert a plastic mediator immediately into the resulting gap.
Move the mediator along the perimeter of the device, smoothly snapping plastic latches. The Redmi 4X metal cover is not only held on the glue, but also on a number of latches that emit a characteristic click when undocking. Don't put too much effort; if the lid doesn't lend itself, it's better to add a little more heat than break the mounts.
Particular care should be taken in the upper part of the smartphone, where the main camera module and flash is located.A sharp movement can damage the plume connecting the camera to the motherboard, or the lens itself.The movements should be sliding, parallel to the plane of the body.
When all the latches on the sides and bottom are free, you can gently lift the top of the cover. It can still be glued to the camera lens, so the final separation is better done by slightly bending the cover and cutting the glue residue with a mediator.
Dismantling the protective plate and disconnecting the plume
When you remove the back cover, you'll see the inside of the smartphone, which is covered by a metal screen, and at the bottom of the battery, there's a protective plate that covers the connectors and the bottom of the battery, and it's screwed with a few screws to the frame of the device.
Use a PH00 screwdriver to twist all the visible screws on the bottom protective plate. In the Xiaomi Redmi 4X, their number can vary, but usually it is 4-6 screws around the perimeter of the plate. Fold them into a separate cell so as not to confuse them with the screws of the top.
Carefully remove the metal plate. Underneath it, you'll see a battery connector that's connected to the motherboard. Before you pull the battery, you need to turn off this plume. This uses a plastic blade or nail; you better avoid contacting contacts with metal tools to avoid static discharge.
| Component | Location. | Type of attachment | Risk of damage |
|---|---|---|---|
| Protective plate. | Lower third of the hull | PH00 screws | Low. |
| AKB slack | Under the plate, at the bottom edge. | Clamp (FPC) | Medium. |
| Battery | Central part | Adhesive tape | High (in puncture) |
⚠️ Warning: Turn off the battery plume, you need to be strictly perpendicular to the board, putting it on the end. Swinging the connector from side to side can break the response part on the motherboard, which will require expensive repairs in the service.
Once the plume is turned off, the device completely shuts down, and now there's nothing stopping the battery from being removed, but it's firmly locked in double-sided tape, and you can't just pull it out, you need to get some pre-preparedness.
Technology of extracting the battery from the body
The most critical thing is to separate the battery from the frame. In the Redmi 4X, the battery is glued quite tightly. There are several methods of removing it, but the safest is to use heating and filament.
Use a hair dryer again to warm the area around the battery through the open space (the back cover is already removed), warm it moderately, controlling the temperature with your finger, the goal is to soften the glue, but not heat the battery to critical values.
You can use a thin dental floss, a line, or a special plastic tool to extract it, and you can thread it under the bottom end of the battery (from the connector side) and you can seep it along one of the long sides, and you can thread it off the glue layer, freeing the battery.