How to remove the battery from the phone Xiaomi: the full guide

Modern Xiaomi, Redmi and Poco smartphones are famous for their reliability and capacious batteries, but over time, any lithium-ion power source loses its original capacity. Device owners often notice that the phone begins to quickly discharge or turn off in the cold, which signals the need to replace the battery. Unlike older models with removable covers, modern gadgets require a more complex opening procedure.

Many users wonder if you can do this on your own at home, and the answer depends on your specific model and your basic skills with small electronics, ranging from relatively simple removal of the back cover to complete disassembly of the case using heat and special solvents.

Before you start taking active action, you need to clearly understand the risks associated with leakage of the case. Self-opening Xiaomi phone almost always leads to the loss of the official warranty of the manufacturer. If your device is in warranty service, it is wise to contact an authorized service center, where the procedure will be performed free of charge or for a nominal fee.

Preparation of the workplace and necessary tools

A good battery replacement begins long before you pick up a screwdriver. The first step is to create a safe and well-lit workspace, and you need a table with a hard surface where small screws and parts are not lost in the pile of carpet or fabric.

To do this successfully, you'll need a specific set of tools that you can buy from radio parts stores or marketplaces. Without proper equipment, you're at risk of damaging plumes or breaking the screen when you try to (fake) the case.

• 🔧 A set of precision screwdrivers (cross Pentalobe and Phillips) for screw twisting.
• 🌡️ A hair dryer or heating platform to soften the glue under the back cover.
• 💳 Plastic cards or mediators for neat opening of the case without scratches.
• 🧴 Isopropyl alcohol or special solution B-7000 glue-removal.

Special attention should be paid to the safety of lithium batteries, damage to the battery shell can lead to fire or chemical burns, always work in a ventilated room and keep a sand container handy in case of an emergency.

Determining the type of design of your smartphone

The strategy depends on how your Xiaomi is designed, and the company’s devices can be divided into three categories according to the type of access to internal components, and understanding the design will help you choose the right method of opening and avoid fatal errors.

The first category is the rare models with a removable back cover, and if you have a small nail cutout on the end of your smartphone, you're lucky enough to just plug the lid and remove the battery, but most of today's flagships and budgeters fall into the second and third categories.

The second category is fixed-removable back cover devices, which are held on a powerful adhesive layer, which requires heating and careful peeling, and the third category is phones with a modular design or on-screen fingerprint scanner, where removing the cover requires turning off the plumes, which makes it much more difficult to do.

⚠️ Warning: Never force the back cover if it fails. Excessive force is guaranteed to cause cracks in the glass or damage to the plastic frame.

To determine the exact model and search for specific instructions, it is recommended to enter the marking of the device in the search engine. Often under the label M2004J19C is shackled by the well-known Redmi 9A, and knowing the exact code of the model makes it easier to find video guides.

Process of disassembling the case and access to the battery

Once you've decided on the design type and the tools are ready, you can move on to the immediate parsing. If your smartphone has screws on the bottom (often hidden under stubs). SIM-cards or speakers, they must be twisted first.

Then there's the heating step. Turn the dryer on to the average temperature and evenly warm the perimeter of the back cover for 2-3 minutes. Don't hold the hair dryer too close so as not to overheat the screen matrix or plastic elements that may deform.

Use a suction cup or a thin plastic map to create a microscopic gap between the frame and the lid, and then you gently insert a mediator into that gap, and as you cut along the perimeter, gradually separate the adhesive layer.

Once the lid is removed, the inside of the smartphone will open to you, often with an additional metal or plastic plate to protect the plumes, and you also need to disassemble it by twisting the screws.

• 🔋 Disconnect the battery plume from the motherboard, undercutting it with a plastic spatula.
• 🧩 Remove protective screens that cover the connectors of the display and other modules.
• 🧹 Remove the remnants of old glue from the frame of the case before installing a new battery.
• 🧪 Treat the surfaces with isopropyl alcohol for degreasing.

At this stage, it is important not to lose small screws, as they can vary in length. it is recommended to use a magnetic mat or spread the screws in order of their extraction, taking pictures of each step.

Removing the old battery and installing a new one

The most critical aspect is the removal of the old battery. In Xiaomi smartphones, the batteries are often attached to two-way tape, which eventually loses its properties, but can hold very tightly.

The best method is to use special pull-tabs, if they are designed, or to carefully insert a thin line or plastic card under the battery. Movements should be smooth, without jerks, so as not to damage the cell shell.

If you damage the lithium-ion battery shell, you start to react with heat and smoke, and then immediately place the device in a non-combustible container and take it out into the open air.

The new battery must be prepared for installation, new adhesive strips or special glue B-7000 must be applied to it, and do not use superglue (cyanacrylate) as it becomes brittle and can damage components on the next replacement.

Once the new battery is fixed, plug the plume into the motherboard before the characteristic click. Make sure the connector is flat and tight. You can now test the performance without assembling the phone completely by turning on briefly.

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Before final assembly, turn on your phone and run the battery test in the engineering menu (code ##6485##) to make sure that the capacity is correctly determined and that there are no errors.

Assembly of the device and checking leakage

The final step is to build the smartphone, and if you've used the glue to fix the battery and the lid, let it dry completely. B-7000 The primary polymerization time is approximately 10-15 minutes, but the full strength is gained through 24 hour.

Carefully install all the safety plates and screw them. Don't pull the screws, especially the ones that attach the board, as this can lead to microcracks in the texture. Curl them cross-curl them for even pressure distribution.

When you install the back cover, make sure that all the plumes (cameras, buttons, display) are not pressed. Start fixing the cover on one side, gradually pressing the other edges. Press the perimeter evenly for better glue grip.

Once assembled, turn on the device and perform a primary diagnostic, check the touchscreen, cameras, speakers and communication modules, and if everything is functioning normally, you can consider the replacement a success.

⚠️ Attention: For the first few charge-discharge cycles, try not to discharge the new battery to zero or charge to 100% too quickly.

Typical errors and precautions

Even experienced craftsmen make mistakes, let alone beginners. One of the most common problems is damage to the display plume when the back cover is not neatly removed. The screens in modern Xiaomi are glued to the frame, and careless movement can cost you a replacement display module.

Another common mistake is the use of inappropriate tools. Metal blades can short contacts on the board if accidentally touch them under voltage (although the battery is turned off, residual charge may be). Always use a dielectric tool.

Ignoring the heating of the case is the way to break glass, trying to remove the cold cover leads to its destruction, and it is also dangerous to use an open fire to heat, as it can melt the internal plastic elements.

• 🚫 Do not puncture the bloated battery - it will cause an instant fire.
• 🚫 Do not leave your phone with an open battery in direct sunlight.
• 🚫 Do not use metal tweezers to remove the battery from the case.

If you find a bloated battery during the disassembly process, be as careful as possible.The bloated battery takes up more volume and presses on the body, which can lead to cracks on the screen or back panel.

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The key to success is patience and lack of rush, and it is better to spend an extra hour on careful heating and peeling than to break the glass in one second of jerking.

Frequently Asked Questions (FAQ)