Xiaomi’s modern smartphones have long since switched to monolithic cases, where the battery is securely hidden under a sealed back cover, a solution that allows manufacturers to make devices thinner, lighter and more dust-resistant, but makes it much more difficult for the average user to access internal components. If a few years ago the question of how to remove the battery from the shaomi was solved simply by removing the plastic cover, today this procedure requires a special tool and caution.
The need to replace the battery can occur for various reasons: bloating, loss of capacity or accidental damage when falling. It is important to understand that in most modern models, such as the Redmi Note or the flagship Mi, the battery is glued to the body, and its removal is already a complete repair. Trying to remove the battery without heating the case and dissolving the glue in 90% of cases leads to deformation of the battery itself or damage to the display plumes.
In this article, we will take a look at the algorithms for different types of designs, explain why you can’t just pull out the power supply, and look at the risks of self-intervention, what tools you’ll need, how to safely warm the case, and what to do if the battery is swollen and blocked access to other components.
Determine the type of design of your smartphone
The first step before any manipulation is to determine the exact type of case of your device. In the Xiaomi, Redmi and POCO lines, there are both models with removable rear covers and fully sealed monoblocks, depending on the set of necessary tools and the complexity of the procedure.
If you have a budget model of the past generation or a specific phone for the elderly, you may be lucky to have the lid on the latches, in which case you will see a barely noticeable gap or notch around the perimeter of the device for flexing the nail, but statistics show that the vast majority of current smartphones have a non-removable battery integrated into the structure of the case.
Trying to open a monolithic body with nails or a knife without first heating can have serious consequences: the glue that fixes the lid becomes hard as glass at room temperature and can crumble the glass of the rear panel or damage the frame.
⚠️ Warning: If you don't feel the back cover clearly back and you don't see the latch, don't try to force it. Chances are your smartphone is a type of monoblock that requires heating and suction cups.
To diagnose the type of design, carefully examine the ends of the device. The presence of screws under port plugs (USB, SIM) often indicates the possibility of disassembly, but even then the battery can be glued. In modern realities, the concept of a removable battery has almost disappeared from the consumer segment.
Tools and workplace preparation required
You can't replace the battery properly without proper preparation. You'll need not only a new battery, but also a specialized toolkit that minimizes the risk of damage to the electronics. Ignoring this step often results in scratches on the frame or, worse, a breakdown in the display matrix.
The basic kit of the master includes a heating element. This can be a professional heating pad, but at home a hair dryer or even hot (but not boiling) water in a sealed bag attached to the back cover should be suitable. 80-90 degrees so as not to damage OLED-matrix or adhesives inside.
☑️ Battery replacement tools
Also indispensibly the presence of mediators or thin plastic cards. Metal tools are strictly forbidden to use, as they can close contacts on the board or damage soft plumes. To unscrew the screws most often requires a small cross screwdriver or a specific Torx. T5.
Organize the workspace so that all the small screws don't get lost. Use a magnetic mat or a container with sections. The light should be bright and directed so that you can see microscopic connectors and plumes well.
The process of removing the battery in models with a removable cover
Consider a simpler, but rarer, scenario today, a smartphone with a removable back panel, where even in such devices, the battery can sit tight, and simple shaking is not always effective, and it is important to act delicately so as not to damage the contact group.
Take it off first. SIM-So you can find a tray and microSD card, if you have one, and then you can find a notch to open the lid, which is usually in the bottom corner or on the side, and you can gently tuck the lid with your nail or plastic mediator, and you can swipe it around the perimeter, snapping the locks.
Once the lid is removed, you'll see a battery that's just in a niche in older models, or in newer models, it can have a small tongue to extract, or it can be slightly glued, and if the battery is tight, don't use metal objects.
What if there is no tongue to extract?
Turning off the plume is a critical moment. Even if the battery is pulled out of a niche, it can be connected to the board by a connector. Never pull the device by the wires. First, inspect the connector, find the locking mechanism (if any), and gently disconnect the plume, swinging it from side to side.
Replacement of the battery in monolithic cases Xiaomi
For the owners of the popular Redmi Note or Mi series, this section is relevant. This is where the process begins with heating. Put the phone back up on the heat source (heater or hair dryer) for 3-5 minutes. The glue should soften, this will open the case without damage.
Place a suction cup at the bottom of the back cover, pull it back, create a gap, and insert a plastic mediator into the slot. Drive the mediator along the perimeter, cutting the adhesive layer. Be extremely careful at the top of the smartphone, where the plumes of the display and the front camera are located, where the depth of the tool is minimal.
Once the lid is removed, you can access the insides, and often the battery is covered by a plastic or metal plate attached to the screws, unscrew all the visible screws, fold them in order of extraction, and use the heat again, but already directed at the battery area, to loosen the adhesive strips underneath.
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Use isopropyl alcohol or a special adhesive solvent by dripping a couple of drops under the edges of the battery to make it easier to extract.
Removing the seated battery is the hardest part, and there are often display plumes underneath the battery, you can't drag them under the battery, you can tear them apart, you have to first disconnect the display plume from the board (unscrewing the safety plate) so you can lift the screen and pull the battery out from above without damaging the cables.
⚠️ Warning: Never puncture or bend the battery. Lithium polymer batteries can ignite or explode if they are mechanically damaged. If the battery is inflated, treat it like a time bomb.
Once the old battery is removed, clean the case of any glue residues. Install the new battery using double-sided tape (usually bundled with a new battery) or special glue B-7000. Connect the plume, check the on, and then collect the case back.
Typical errors and security measures
Self-repairing electronics always comes with risks. Service center statistics show that a large proportion of devices are delivered to the masters after failing to save money on battery replacement, and users tend to flout safety rules.
One of the biggest mistakes is ignoring the heat: trying to tear the lid by force causes cracks in the glass; the second common mistake is using metal needles or knives, which is guaranteed to short-circuit or damage the plumes.
It's also important to monitor the condition of the instruments, because a dulled mediator can slip and damage the matrix, and dirty hands or tools can leave conductive dust inside the case, causing corrosion or closure in the future.
The table below provides comparative risk profiles for different replacement methods:
| Method | Risk of screen damage | Risk of battery damage | Difficulty |
|---|---|---|---|
| No heat without heating. | High-pitched | Medium. | Low. |
| Heated and suckered. | Low. | Low. | Medium |
| Use of solvent | Medium. | Low. | Tall. |
| Calling the service | Minimum | Minimum | Absent. |
Remember, opening the case automatically deprives you of warranty service, and if the device is still under warranty, any manipulations are best carried out only in an authorized center.
What to do after replacing the battery
After successfully installing a new battery and assembling the case, take your time to load the smartphone right away.Primary charging plays an important role in calibrating the power controller.Plug in the original charger and leave the phone to charge to 100% when off.
The first switch on may take longer than usual. The system diagnoses new hardware. If the smartphone is on, check the sensor, cameras and communications. Sometimes after a battery change, you need to reset or flash if system files have been affected, but in 95% of cases, just turn on the device.
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The first 3-5 charge-discharge cycles try to discharge the phone to 10-15% and charge to 100% without interruptions - this will help the controller to properly calibrate the capacity of the new battery.
Watch the temperature of the case carefully during the first hours of operation. Easy heating when charging is normal, but if the phone gets hot when idle, it may be that the battery plume is not fully connected or damaged, in which case the procedure will have to be repeated.
Dispose of the old battery correctly. You can't throw it in the trash, because the chemicals inside are environmentally hazardous.