Xiaomi Redmi 6A is one of the most reliable budget devices of its time, but time does not spare lithium-ion batteries. If your phone stopped holding a charge, turns off at 20% or swells, then the only solution is to replace the power source. This process requires care, since the case does not involve easy access to the insides, as in the old models with removable covers.
In this article, we will discuss how to safely remove an old battery without damaging the fragile plumes of the display or the motherboard itself. You will need special tools and patience to perform the procedure properly. It is important to understand that the wrong actions can lead to the final breakdown of the gadget, so follow each step carefully.
Before you start, make sure you have a new quality battery compatible with the BN45.The market is full of fakes, so it’s better to buy parts from trusted suppliers. Next, we’ll look at the full dismantling and installation cycle, and answer frequent questions from novice masters.
Preparation of the workplace and necessary tools
Quality repairs start with the right organization of space. You need a clean, well-lit table so that small screws don't get lost in the trash. Light should fall evenly without creating glare on the screen, allowing you to see the fine details of the structure.
A set of tools to replace the battery with the Redmi 6A is standard for most modern smartphones. Without the presence of at least a minimum set of blades and screwdrivers, you can not begin disassembly categorically, since there is a high risk of damage to the body or fasteners.
- 🔧 Screwdriver kit: Cross Phillips #00 and flat for neat tweaking.
- 🛠 Plastic blades (mediators) for opening the body without scratches.
- 🔥 A hair dryer or heating plate to soften the glue under the back cover.
- 🧲 Magnetic mat or screw sorting containers.
Pay special attention to the heater. A normal household hair dryer may not give you enough temperature, so it is better to use professional equipment or warm on moderate heat, constantly monitoring the temperature with your hand. Overheating can damage the LCD matrix or melt plastic elements.
⚠️ Warning: Never use metal objects (knives, needles) to lid the plume area, this is guaranteed to short circuit.
After you've prepared the tools, check the status of the new battery. It should be free of bloating and the contacts should be clean. If the battery comes in a sealed bag, make sure it's not discharged to zero, although this is not as critical for the Li-Ion as it is for older battery types.
Dismantling of the back cover and protective panels
Smartphone Xiaomi Redmi 6A It has an all-metal body with plastic inserts, and it's glued around the perimeter, and you start by turning off the device and removing the tray. SIM-This is the standard safety procedure for any electronic repair.
Heat the back cover around the perimeter for 2-3 minutes. The glue should soften but not leak. Carefully insert the plastic blade in between the frame and the cover, starting at the bottom corner or on the side of the SIM card tray. Move slowly, cutting through the adhesive layer.
Once you remove the lid, you'll see an interior space that's covered by a black plastic panel, and it's attached to a lot of screws of different sizes, and remember the location of each screw, because they can vary in length and diameter.
☑️ Check before removing the lid
When you unscrew all the screws, carefully remove the safety panel, underneath it is the motherboard, the main plume of the display and the battery itself. Be very careful: the screen plume passes near the battery installation area and easily breaks when handled carelessly.
Disabling plumes and removing the battery
The first thing you need to do is turn off the device, find the battery connector on the board, and gently disconnect it with a plastic blade, and the movement should be directed upwards, not sideways, so as not to break the contacts on the board.
The battery in the Redmi 6A is also planted on glue, but not as aggressive as the lid.It is fixed with double-sided tape, subdeniu (battery) for special protrusions or use a thin plastic card to separate it from the frame.
- 🔋 Never pierce or bend lithium after extraction.
- 🧤 Use antistatic gloves to protect your contacts.
- 🧼 Wipe the landing site of the new battery with alcohol for degreasing.
If the old battery is swelling, act with extreme caution, damage to the shell of the swelled battery can lead to fire or the release of caustic fumes, in which case it is better to immediately place the extracted element in a non-combustible container.
⚠️ Warning: If you smell chemicals or see smoke, stop working immediately, ventilate the room and dispose of the battery in a special container.
Once the old element is removed, clean the inner cavity of glue and dust residues, which will ensure a tight fit of the new battery and a good heat sink, and dirt inside the housing can overheat the components over time.
Installation of a new battery and assembly
The assembly process is reversed, but it has its nuances: the new BN45 battery must be pasted with fresh strips of double-sided tape, and don't use old glue, as it has already lost its properties.
Put the battery in the compartment, making sure the connector matches the reciprocating part on the board. Carefully press the connector until the characteristic click. Check the reliability of the connection by slightly swaying the connector (no fanaticism), it should not hang.
What if the phone doesn’t turn on after replacement?
Put the plastic panel in place, and twist all the screws. Follow the twisting order: first the corners, then the center, to evenly distribute the pressure. Don't pull the screws, the plastic can crack.
Apply a thin layer of B-7000 glue or use new adhesive tapes around the perimeter of the back cover. Press the lid and lock the smartphone with rubber bands for 15-20 minutes before the initial grasp of the glue, which will ensure the housing is tight.
First start and calibration of the battery
After assembly, take your time to turn on the smartphone. Let the glue dry a little, then connect the device to the charger. The first charge should go up to 100% off, if possible, or in standby mode.
MIUI may take time to calibrate the new battery, and in the first days of use, watch the device's behavior: whether it's warming, whether it's surges in percentage of charge, and calibration will help the power controller to correctly display the charge level.
For full calibration, it is recommended to completely discharge the phone before turning off, and then charge to 100% without interruption. Repeat this cycle 1-2 times. This will align the memory cells of the controller and extend the life of the new battery.
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Use the original Xiaomi charger or certified Quick Charge-enabled counterparts for optimal power controller performance.
Table of compatibility and characteristics
When choosing a replacement battery, it is important to pay attention not only to the model, but also to the technical parameters. Below is a table of basic characteristics for the Redmi 6A, which will help distinguish the original from the fake.
| Parameter | Original | Quality copy | Cheap forgery |
|---|---|---|---|
| Model | BN45 | BN45 | BN45 (often erased) |
| Capacity | 3000 mAh | 2800-3000 mAh | 1500-2000 mAh |
| Tension. | 3.85V | 3.8V - 3.85V | 3.7V |
| Weight. | ~45g | ~40-44g | ~30-35g |
Battery weight is one of the easiest ways to test it. Lithium has a certain density, and if the battery is suspiciously light, it means there is less chemistry inside than claimed. The actual capacity of cheap analogues often does not exceed 60% of the declared.
Also pay attention to the quality of the markings. The original text is clear, not erased by a finger, but rather QR-The code is read by the camera. The plume should be elastic, not rigid and brittle.
Frequent problems after replacement
Even with a careful replacement, there may be unforeseen situations: a smartphone may not see charging, run out quickly or show an incorrect percentage, most often the problem lies in poor contact of the plume or the battery itself.
If the phone is cyclically restarted (bootloop), it may have damaged one of the connectors on the board or the battery itself has a short circuit, in which case redisassembly and multimeter diagnostics are required.
- 📉 Fast discharge: battery failure or background process in the system is possible.
- 🔌 No charge: check the connector and charging cable.
- 📱 Touchscreen does not work: could move the plume of the display during installation.
In rare cases, a factory reset is required after a replacement to allow the system to correctly recognize new hardware, but this is rarely required for the Redmi 6A, usually a simple reboot is enough.
⚠️ Warning: If the phone starts to warm up in the area of the camera after the replacement, turn it off immediately.This may indicate a circuit circuit circuit circuit circuit circuit or a faulty charge controller.
Tips for extending the life of a new battery
To keep the new battery lasting, avoid deep discharges to zero. Lithium-ion chemistry doesn't like extreme states. Try to keep the charge in the range of 20% to 80% for everyday use.
Don't leave your phone charging all night, although modern controllers can cut off current. Overheating is the main enemy of the battery. Don't play heavy games while charging, it causes double heating.
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Compliance with the temperature regime and the use of high-quality chargers extend the life of the Xiaomi Redmi 6A battery by 30-40%.
Check the condition of the connectors regularly and clean them of dust. Dust can conduct current and cause micro-short circuits that imperceptibly land the battery. Care for the device is the key to its longevity.