Xiaomi Redmi 6A is one of the most reliable budget models, but time spares no one, and lithium polymer batteries tend to wear out. If your device stops holding the charge, turns off at 20% or swells, the only right solution is to replace the power source. Self-repair saves a significant amount of money that would have to pay in the service center, but requires accuracy and understanding of physical processes.
The procedure for replacing the battery in this model does not belong to the category of super-complex, but requires a specific set of tools and safety. Unlike the flagship lines with glued screens, the design of the "six" is more user friendly, although it has its own nuances with plastic latches. Before starting work, you need to carefully study the sequence of actions so as not to damage the plumes or the body of the device.
In this article, we will take a closer look at each step of dismantling an old battery and installing a new one, with a focus on adhesives and connectors. You will learn how to properly prepare the workplace, what tools will become indispensable assistants and how to avoid common beginner mistakes. A well-conducted replacement will return your gadget to a second life and complete autonomy.
Diagnosis and preparation for repair
Before starting to disassemble, you need to make sure that the problem lies in the physical wear of the battery, and not in software failures or the power controller. Often users confuse the bloated battery with a software calibration bug, so visual inspection and voltage tests will be the first step. If the back of the smartphone has moved away by itself or the screen began to bulge out of the frame, this is a clear sign that the lithium polymer cell is inflated and requires urgent disposal.
To perform a good diagnostic and subsequent repair, you will need to organize a workplace with good lighting and antistatic coating. It is crucial that there are no metal objects on the table that could accidentally close the contacts of the board or damage the display glass. It is also recommended to completely discharge the device before work begins to minimize the risk of short circuit when the connector is disconnected.
⚠️ Warning: If the battery is very swollen and deformed the body, do not press on the screen and the back cover, as a puncture of the shell can lead to the ignition of the electrolyte.
The organization of the repair space is key to the success of the operation: Deploy all tools in the immediate vicinity, so as not to look for them in the process, when the hands are occupied with fragile components. Using a magnetic mat or organizer for screws will help you not lose small parts and remember their location.
Required tools and materials
The quality of battery replacement depends on the equipment and supplies used. Using inappropriate tools can damage the plastic latches of the case or even injuries to the hands. The Redmi 6A model is characterized by the use of screws of different types, so a standard screwdriver will not be enough.
Here is a list of what you will need to complete the procedure successfully:
- 🔧 Set of screwdrivers: mandatory presence of cross PH000 and maybe a triangular bit for screws under the screen.
- 🔥 Dryer or heat heater: necessary to soften the factory glue holding the back cover.
- 🎴 Plastic mediators: thin blades for opening the body without scratches.
- 🧪 Clay. B-7000 or double-sided tape: for sealing of the new battery and assembling the body.
- 🧤 Antistatic gloves: protect components from static electricity and fingerprints.
Special attention should be paid to the choice of heating appliance. Household hair dryer may not give enough temperature to soften industrial glue, so it is better to use a temperature-adjusted building hair dryer or a special heating pad for phones. The heating should be uniform to avoid local overheating of the plastic, which can lead to its deformation or color change.
The adhesive composition also plays an important role in the final sealing of the device: Do not use superglue (cyanacrylate), as it has the property of crystallizing and can crumbling plastic or damage plumes during subsequent repairs. The B-7000's specialized adhesive remains elastic after drying, allowing the device to reopen without damage if necessary.
☑️ Ready for repair
Rear cover removal process
The most difficult step for beginners is often to carefully remove the back panel, as it is held on a powerful adhesive layer around the perimeter. SIM-maps to eliminate any electrical contact during operation, then evenly warm the perimeter of the back cover with a hair dryer during the operation. 2-3 minutes, constantly moving the flow of hot air, so as not to overheat one point.
Once heated, take a suction cup and attach it to the bottom of the back cover, closer to the edge. Pull the suction cup up, creating a small gap between the frame and the panel, and gently insert a plastic mediator into the resulting gap. Drive the mediator along the perimeter, cutting the adhesive layer, but do not dive the tool deeper than 2-3 mm, so as not to touch the internal plumes coming from the volume and power buttons.
Be extra careful in the corners of the device, where the glue is often stronger and the plastic is more fragile. If the lid does not lend itself, do not use force, and add a little more heat. In the Redmi 6A model, under the back cover, you immediately access the main board and battery, but first you need to remove the protective plate.
What to do if the back cover is broken?
After successfully removing the lid, you will see the interior of the smartphone, and visually examine the plumes and connectors for oxidation or mechanical damage that may have occurred as a result of falling or ingressing moisture.
Replacement of the battery and connection of plumes
When you get to the insides, you'll see that the battery takes up most of the space and is attached to double-sided tape. In some cases, there may be a metal plate-screen covering the connectors on top, which is attached with several screws. Unscrew all the visible screws holding the protective screens, and put them in a safe place, following the sequence of twisting.
The first thing you need to do is to disconnect the battery plume from the motherboard. Use a plastic blade or nail to gently fit the connector up. Do not use metal tweezers to turn off the battery under voltage, as this can short-circuit and cause the power controller to fail. After the switch-off, you can start removing the old cell.
To extract the battery, use a suction cup or a thin plastic card, putting it on the bottom, and if the battery is very tight, you can warm the area under it slightly with a hairdryer, but very carefully so that you don't damage the display on the back. Pull evenly, without sharp jerks, so that the cell does not deform.
| Parameter | Old battery | New battery | Norma. |
|---|---|---|---|
| Tension. | 3.7V - 4.2V | 3.85V | 3.7V - 4.4V |
| Capacity | Less than 2,500 mAh | 3000 mAh | 3000 mAh |
| Status. | Bloating/Depreciation | Flat/solid | Free of deformities |
| Release date | Older than 2 years | Fresh. | Not older than 6 months. |
Install the new battery by applying a fresh adhesive layer to the body's padding. Use double-sided phone tape or a thin layer of B-7000 adhesive. Make sure the contacts of the new battery match the original in location and length of the plume. After installation, press the battery tightly and plug the connector into the characteristic click.
💡
Before the final assembly of the case, test the smartphone to make sure the device responds to charging and shows the correct percentage of charge.
Assembly of the device and check of performance
After successful replacement and initial testing, the final assembly phase begins: Carefully clean the perimeter of the body and back cover of the residue of old glue using alcohol or a special solvent to ensure maximum adhesion of the new adhesive layer.
Apply a thin strip of glue around the perimeter of the frame or glue a new layer of double-sided tape. Carefully combine the back cover, starting at the top, and press it tightly throughout the circuit. For better fixation, you can put the smartphone under a lightweight load for 15-20 minutes until the glue catches.
Turn the device on and run a full charge-discharge cycle to calibrate the controller, which means charging the phone to 100% when it's off, then fully discharging before it turns off and charging again to full capacity, a procedure that will help the system correctly display the remaining operating time.
Check all the function buttons and communication modules, as if the assembly was sloppy, you could accidentally squeeze the antenna plume or buttons. If everything works correctly, you can consider the replacement process completed successfully.
Typical errors and precautions
In the repair process, users often make mistakes that can nullify all efforts or even permanently disable the device. One of the most common problems is damage to the display plume when the body is unsettled. In the Redmi 6A, the screen plume runs close to the edges, and careless movement by the mediator can lead to stripes on the screen or complete dimming.
Another critical mistake is the use of inappropriate adhesives, as mentioned earlier, cyanacrylate adhesives ("Superglue") release vapors that settle on the camera lens and sensor lenses, creating an irremovable whitish film that can permanently damage the quality of the photos, even if the camera module itself is in good shape.
⚠️ Warning: Never attempt to punctur or compress a lithium battery. Damage to the internal structure can cause instant thermal ignition that is almost impossible to extinguish with conventional means.
Also worth mentioning is the risk of static electricity: In dry rooms, especially in winter, the charge accumulated on the body can penetrate the sensitive electronics of the board, working in antistatic gloves or periodically touching grounded metal objects will help to avoid this problem.
💡
The main risk of replacement is damage to plumes and the use of aggressive chemistry, so accuracy and the right materials are more important than speed of work.