How to disassemble the Xiaomi Redmi smartphone with a non-removable battery: a guide

Sooner or later, any Xiaomi Redmi user faces the need for internal intervention in the device, most often it is a question of replacing a swollen battery, a broken display or a worn charging connector. In modern models, the manufacturer has abandoned removable rear covers, which makes the disassembly process more complex and requires certain skills.

Before picking up a screwdriver, it is important to be aware of the risks: warranty seal on screws or under plugs SIM-The card will be derailed, which will automatically deprive you of the right to free service in authorized centers. However, if the warranty period has expired, and the skills of soldering or fine mechanics are not alien to you, self-repair will save a significant amount of money. In this article, we will analyze in detail the algorithm of actions for safe opening of the body.

It's worth noting that the design of Redmi smartphones can be very different from one generation to another, with glue used somewhere and only latches used somewhere, and understanding the principles of disassembly will help you avoid making fatal mistakes, such as battery damage or the removal of the touchscreen plume. We'll look at the universal steps that apply to most non-removable models.

Tools and workplace preparation required

You can't disassemble quality without the right tools. Using knives, pins or rough household items often results in scratches on the frame or, worse, a battery puncture. You'll need a specialty kit that you can buy from any electronics store or order online.

The organization of space is also critical. Small screws have the ability to fly around the table and get lost in the pile of the carpet. The ideal solution would be to use a magnetic mat or at least a clean white paper that shows all the details clearly. Remember to provide good lighting to the work area to see the microscopic connectors.

The basic set of the master should include the following subjects:

• 🔧 A set of precision screwdrivers (mandatory presence of cross-shaped) PH000 and PH00).
• 🔪 Thin metal spatula or scalpel for primary opening.
• 🧱 Plastic cards or mediators for snapping the body without damage.
• 🌡️ Heat source (dryer) to soften the glue under the screen or back cover.
• 🧲 Magnetic substrate for sorting screws.

Pay special attention to the Phillips screwdriver. The screws in Xiaomi smartphones often have a specific notch, and using a too large or worn bit will lead to the licking of the hat. This will turn a simple repair into a complex operation to drill the fastener.

Primary security measures and disabling the device

The first and most important step is to completely shut down the smartphone. Working with electronics under voltage is fraught with a short circuit that can instantly disable the power controller or other components of the motherboard. Even if the phone does not respond to buttons, you need to try to discharge the battery to zero or use special commands to force shutdown.

After you turn off, remove the tray. SIM-Not only will this free up access to some of the hidden screws, but it will also protect the data on the drive from being damaged by static electricity. In some Redmi models, one of the fasteners is hidden under the SIM card tray.

⚠️ Warning: Never start a disassembly if the battery level exceeds 25-30%. Damage to the lithium polymer battery in a charged state can lead to its fire or explosion.

Static electricity is the invisible enemy of electronics, and before work begins, it is recommended to remove synthetic clothing and touch a grounded metal object, such as a heating battery or a computer case, which equalizes the potential and reduces the risk of a static failure of the chips.

If the smartphone screen is broken and does not show the image, but the touchscreen is partially working, you can try to turn off the device with a combination of buttons. If the phone is completely dead, disconnecting the battery will be the first action after partially opening the case.

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Use isopropyl alcohol to clean contacts and remove glue residues. It evaporates quickly and does not conduct current, unlike water or other solvents.

Rear cover removal and access to the insides

In most modern Xiaomi Redmi models, the back cover is made of glass or plastic and glued around the perimeter. It requires heating to remove it. Use a hair dryer, evenly warming the edges of the device for 2-3 minutes. The temperature should not be extremely high, it is enough to warm the case to a state where it is unpleasant to hold in your hand.

After heating, insert a thin suction cup at the bottom of the back cover, closer to the logo or charging connector. Pull the suction cup upwards, creating a gap, and gently insert a plastic mediator or blade into the slot. Move the tool along the perimeter, cutting the adhesive layer.

Carefully work on the top of the smartphone, where the main camera is located. A sharp movement can damage the flash plume or fingerprint scanner if it is attached to the lid. In some models, the scanner is integrated into the side button on and is not connected to the lid, but rechecking will not interfere.

Once the lid is successfully removed, don't try to remove it completely. Check the internal connections. Often, the fingerprint scanner plume or the bottom board plume can be glued to the inside of the lid, and they need to be gently detached from the connectors on the motherboard or unstuck if the design requires it.

Removal of the protective panel and disconnection of the battery

When you remove the back cover, you'll see a plastic or metal plate covering the motherboard and the battery, and it's attached to a lot of small screws of different lengths, and it's critical to remember or photograph the location of each screw, because they can vary in length by fractions of a millimeter, which is essential when you build them.

Use a magnetic mat or a piece of paper with a drawn circuit, spreading the screws in the same order in which you twist them. Especially carefully unscrew the screws around the plume connectors - their damage can lead to the inability to connect the display.

The first step after removing the protective panel should be to turn off the battery. Find a wide plume going from the battery to the board, and gently tuck it into a plastic blade. The connectors in Xiaomi smartphones are quite tight, but using a metal tool here is forbidden to avoid circuiting.

• 🔋 Disconnect the battery plume from the motherboard.
• 📱 Turn off the display plume (usually the widest connector).
• 📷 Disconnect the main and front camera plumes.
• ⚡ Turn off the lower board (sub-board) plume with the charging connector.

Only after the device is completely de-energized can disassembly continue, a fundamental safety rule for any electronics with a non-removable battery, and ignoring this step can cause the backlight of the screen or charge controller to burn when the instrument accidentally touches the contacts.

Replacement of the battery and work with glue strips

In Redmi smartphones, the battery is usually fixed to the body with two long adhesive strips located under the battery. You can't just pull it out like that, because there's a high risk of damaging the cell shell. Removal will require heating the bottom of the smartphone and using a thin fishing line or a special hood.

Warm up the battery area with a hair dryer. Then apply a line or a thin string under the bottom edge of the battery. Sawing moves from side to side gradually move inwards, cutting the adhesive layer. Don't use metal blades to tweak the battery from below, which is a guaranteed fire path.

⚠️ Warning: If the battery is swelling, treat it with extreme caution. Do not press or pierce it. The swelling battery is unstable and can ignite at the slightest deformation.

After removing the old battery, clear the seat of the residue of old glue.The new battery often comes with already pasted strips of bilateral tape.If none are available, use a special B-7000 glue or quality two-way electronics tape.

When installing a new battery, make sure that the contacts match and the train is not bent. Carefully press the battery against the case. Connecting the plume to the motherboard should only occur after the battery is securely fixed in place.

Assembly of the device and verification of functionality

The assembly is done in reverse order, but requires even more care. First, plug the battery, then the display. Turn on the phone without screwing the screws or gluing the lid to check the touchscreen, sound, microphone and cameras, which will save time in case some plume was not fully connected.

If all functions are working correctly, turn off the device. Put all the plumes in your channels, press them with locks (if any), install a protective plate and twist all the screws. Make sure that no screw is left over - this is a common mistake of beginners.

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Checking all modules before the final gluing of the case is a mandatory step that will save you from re-disassembly in case of malfunction.

For the final fixation of the back cover, apply a thin layer of B-7000 glue around the perimeter of the frame or use new adhesive strips complete with spare parts. Press the lid and lock the phone with rubber bands for 15-20 minutes until the glue is completely dry.

When you build, make sure that the plumes are not squeezed, especially the plume of the display, which runs close to the screw racks, and the compressed plume can cause the stripes to appear on the screen or completely shut down after a while.