Smartphone Xiaomi Redmi 6 has proven to be a reliable budget device, but over time, the capacity of its battery inevitably decreases. If your phone stopped holding charge during the working day, turns off at 20% or the body is swollen, then replacing the battery becomes the only true solution to restore the functionality of the gadget.
Recovery requires care, because modern smartphones are tightly assembled and access to internal components is limited. Incorrect actions can damage the plumes, display or even fire a new battery. In this article, we will discuss in detail how to choose a quality part and safely repair at home.
Diagnostics and selection of a new battery
Before disassembling the case, you need to make sure that the problem lies in the wear of the chemical battery. Software failures can also distort the reading of the charge level, so you should first perform a calibration or reset settings. If the battery is physically inflated or the phone is only running from the charger, replacement is inevitable.
When choosing a new battery for Xiaomi Redmi 6, pay attention to the model marking BM3B. There are many counterfeits on the market that not only won't restore autonomy, but can also damage the motherboard's power controller. Original batteries usually have a hologram of the computer. QR-code and clear printing of the manufacturer's logo.
How to verify the authenticity of the battery?
It should be borne in mind that cheap analogues often have a real capacity of 2-3 times lower than the declared. The use of low-quality components can lead to overheating of the device during operation.
- 🔋 Look for the markings. BM3B on the battery and packaging.
- 🔋 Check the voltage: it should be 3.85V or 4.4V depending on the specification.
- 🔋 Avoid buying batteries without protective film on contacts.
- 🔋 Make sure that the plume connector matches the original connector.
⚠️ Warning: Never reuse a bloated battery. Mechanical damage to the battery shell can cause the electrolyte to ignite when punctured or heated.
Tools and workplace preparation required
To successfully replace the battery, you need a minimum set of specialized tools; using improvised tools such as knives or thick needles increases the risk of damage to the body or internal components; and a high-quality tool greatly simplifies the process and reduces the likelihood of failure.
Organize the workplace so that all the parts are at hand and the lighting is sufficient. Small screws are easy to lose, so it is recommended to use a magnetic mat or organizer with cells. Before starting work, be sure to turn off your smartphone.
☑️ Repair tools
Pay special attention to heating the back cover. The glue that holds the glass softens at about 80-90 degrees Celsius. Overheating can damage the display or internal plastic elements, so monitor the heating temperature.
Rear cover removal process
Removing the back is the most critical step, as the Xiaomi Redmi 6 glass cracks easily when handled carelessly. Heat the perimeter of the back cover evenly, paying special attention to the corners where the glue freezes tightly. Don't heat the center back too much so as not to damage the camera.
Once warmed up, use a suction cup to create a small gap between the glass and the frame. Insert a thin plastic card or mediator into the gap carefully. Driving the instrument along the perimeter, gradually cutting the adhesive layer. The movements should be sliding, parallel to the plane of the smartphone.
💡
If the lid doesn't lend itself, don't use force. Add a little more heat and drip the isopropyl alcohol into the gap, and it will dissolve the glue.
It is important not to enter the plastic shoulder blade too deep to avoid hitting the fingerprint scanner plume or connectors if they are close to the edges. In the Redmi 6 model, the main camera and display plumes are on the front, which makes it a bit easier to remove the back cover, but caution still does not hurt.
- 🔥 Heat the edges evenly during the 2-3 minute.
- 🔥 Use a suction cup to create an initial gap.
- 🔥 Move the mediator smoothly, without jerking.
- 🔥 Make sure that the plastic does not scratch the frame of the case.
Disconnecting plumes and removing the old battery
Once the lid is removed, you will be able to access the insides of your smartphone, and the first step is to disconnect the battery plume from the motherboard, a critical step that ensures electrical safety when you manipulate it further.
The battery in Xiaomi Redmi 6 is mounted on double-sided tape. To extract it without damaging the shell, you can use a thin line or a plastic card. Carefully slap it from the bottom and gradually peel it off, trying not to deform. Deformation of the lithium polymer element is dangerous.
If the battery is sitting very tightly, you can slightly warm the area under it (on the back of the case, if it is removed, or carefully with a hairdryer) to soften the glue. However, be extremely careful: direct heating of the bloated battery can cause fire.
⚠️ Warning: It is strictly forbidden to pierce or bend an old battery, even a small spark inside a damaged cell can lead to instantaneous ignition.
Installation of a new power supply and assembly
Before installing a new battery, clear the seat of the old glue residue. Use a soft fabric slightly moistened with isopropyl alcohol. The surface must be clean and fat-free to securely fix the new element.
Apply a new layer of double-sided tape or B-7000 adhesive to the body. Carefully place the new battery with the connector attached. Connect the plume to a characteristic click, making sure it is up flat and unskewed.
💡
The right connection of the plume is key to the successful activation of the phone, and an insufficiently inserted connector can cause sparking or no charge.
Once the battery is plugged in, take your time to close the lid. Turn on the phone and check if the charge is going, if the battery percentage is displayed correctly, if the touch screen is working properly, you can apply glue to the frame and press the back cover.
Table of compatibility and characteristics
To make it easier to compare the original battery with the common ones, we have prepared a summary table that will help you understand what you are buying and what to expect from the device.
| Parameter | Original Xiaomi BM3B | Quality analogue | Cheap copy |
|---|---|---|---|
| Capacity (typical) | 3,000 mAh | 2800-3000 mAh | 1500-2000 mAh |
| Tension. | 3.85V | 3.85V | 3.7V - 3.8V |
| Charge controller | The original chip | Compatible chip | Missing or plain |
| Cycle resource | 500+ cycles | 300-400 cycles | 50-100 cycles |
As you can see from the table, the difference in resource and real capacity between the original and the cheap copy can be twofold. The savings on the battery often lead to the need for re-repair after a few months.