Xiaomi Redmi 4X is one of the most reliable devices of its time, but time is not spared lithium-ion power sources. If your device began to quickly discharge, turn off in the cold or show a residue of charge of 20-30%, and then suddenly fade, then it is time to replace the battery. This is a common problem for models released several years ago, and self-repair here is the most economical solution.
Many users are afraid to open modern gadgets for fear of damaging plumes or the screen. However, the design of the Redmi 4X is quite friendly to repair, if you act carefully and consistently. In this article, we will discuss the entire process from choosing a tool to the final health check, so you can extend the life of your device without visiting a service center.
Before starting disassembly, you need to prepare the workplace and make sure that all the necessary tools are available. Negligence during the preparation stage can damage the body or internal components, so take this stage seriously.
Diagnostics and selection of a new battery
The first step is to accurately diagnose the battery. Software methods such as calibration or resetting statistics often do not help if physical wear has reached a critical level. Bloating the battery is a clear sign that its operation is dangerous and requires immediate replacement. If the back cover of the smartphone has started to move away or the screen has risen, you can not pull with repair.
When choosing a new battery, it is important to pay attention not only to the capacity, but also to the manufacturer. Original parts are harder to find, but quality counterparts from proven brands (for example, Nohon or Cameron Sino) often serve as well. Avoid cheap “noneyme” options that may not meet the declared characteristics and quickly degrade.
- 🔋 Capacity: The standard capacity of the model is 4100 mAh, look for options with real indicators close to this value.
- 🏷️ Labeling: Original battery model has code BM47, Check the compliance when buying.
- 🛡️ Protection: Make sure the new battery’s protection board has quality controllers to prevent overheating.
It's worth noting that even a new battery can require multiple charge-discharge cycles to reach full operating power. Don't expect instant results in the first hours of use, let the chemical processes stabilize. This is normal practice for all lithium batteries.
⚠️ Warning: Never use bloated batteries, even for short periods of time. Mechanical damage to the shell of such a cell can lead to fire or chemical burns.
Tools and workplace preparation required
For a quality battery replacement with Xiaomi Redmi 4X you will need a minimum set of tools that can be found in any construction store or ordered online.The main requirement for the toolkit is that it must be serviceable and of the right size, so as not to break the screws and not damage the plastic.
Organize the workspace so that all the parts are at hand and the lighting is sufficient to work with small components. Lost cog or plume can greatly complicate the assembly process, so order on the table is the key to success.
☑️ Replacement tools
Pay special attention to the choice of suction cup and mediator. Cheap suction cups can unstick at the most inopportune moment, and sharp metal tools can damage the internal plumes. Use only proven materials to open the case.
| Tool. | Appointment | Importance |
|---|---|---|
| Phillips screwdriver #000 | Body screw twisting | Critically important |
| Plastic mediator | Opening the case without scratches | Tall. |
| Suction cup. | Primary detachment of the back cover | Medium |
| Tweezers | Extracting fine detail | Medium |
The process of disassembling the Redmi 4X hull
Start disassembly with the device switching off and retrieval SIM-These are basic safety measures that you can't ignore, and then you have to unscrew the two screws that are located at the bottom of the case next to the charging connector, hidden under decorative plugs or visible immediately, depending on the version of the case.
Once the screws are removed, you have to disconnect the back cover, and it's held on plastic latches around the perimeter, and use the suction cup to create a small gap at the bottom, and carefully insert a plastic blade there, and then you can use the tool along the edges, gradually releasing the latches.
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Heat the edges of the body with a hair dryer or place the smartphone on a warm (not hot!) surface for 2-3 minutes. The plastic will become softer, and the risk of breaking latches or the lid will be significantly reduced.
Don't use excessive force. If the lid doesn't open, you miss the screw or you don't fully snap the locks. The metal frame inside can be sharp, so be careful not to hurt your fingers. Once you remove the lid, you'll be able to access the insides of the device.
⚠️ Warning: When working with plastic latches, avoid sudden jerks. The plastic becomes brittle over time and sloppy movement can lead to chips or cracks on the body.
Disconnecting plumes and removing the old battery
The next step is the most important one. You need to access the battery connector, and you need to remove the metal plate that covers the main plumes, and it's attached with a few screws that you need to unscrew and fold neatly into a separate container.
Once the protection is removed, you will have access to the main plume of the display and the battery connector. First of all, turn off the battery to turn off the device. Use a plastic blade or nail by putting the connector up from the bottom up. Metal tools are not recommended here to avoid short circuits.
- 🔌 Display plume: turn it off gently, without yanking, so as not to damage the contacts.
- 🔋 Battery connector: pry strictly perpendicular to the board, avoiding side pressure.
- 🧩 Protective plate: remember the location of screws of different lengths, if they differ.
The old battery in the Redmi 4X is usually attached to double-sided tape. To remove it, gently tuck the edge of the battery with a plastic card or a spatula. Don't try to pull the battery behind the wires or connector - this will lead to a break in the contacts. If the tape holds very tightly, you can slightly warm up the area under the battery.
What to do if the battery is stuck dead?
Installation of a new battery and assembly of the device
Before installing a new battery pack, clean the battery bed of any residues of old glue. The surface must be clean and defatted to securely lock the new battery. Apply new strips of double-sided tape or use a special B-7000 glue if the scotch doesn't come with the kit.
Connect the new battery to the board, making sure the connector is up to click and even. Check visually if there are any skews. After that, you can temporarily turn on the device without screwing the lid to make sure that the smartphone reacts to charging and on.
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Successful on and display of the correct percentage of charge is the main indicator that the replacement was successful and the new battery is determined correctly by the system.
If everything works, turn off the phone and start to reverse assemble. Lay the plumes carefully so they are not clamped down. Set the metal plate in place and twist all the screws. Then snap the back cover around the perimeter, starting at the bottom.
Primary calibration and performance check
Once assembled, the device is ready for use, but it is recommended that you perform an initial calibration, which will help the system correctly display the charge level. Completely discharge the smartphone before turning off, then put it on charge and hold it to 100% for an hour after indicating full charge.
In the early days of use, watch for heating of the case. Light heat in the battery area when active is normal, but strong heating indicates problems with contact or quality of the battery itself.
If the LED behaves strangely (flashes red when connected to the network), this may indicate poor contact of the connector, in which case you will have to repeat the disassembly and reconnect the battery.
⚠️ Warning: If the phone doesn't turn on or charge after assembly, don't panic. Most often, the problem is an incomplete connector. Carefully disassemble the device again and check the density of the connection.