How to Remove the Battery from Xiaomi Redmi Phone: The Complete Guide

Modern Xiaomi smartphones and sub-brands such as Redmi and POCO are designed to maximize the monolithic design, making the battery recovery process a challenge for the untrained user. Unlike older models where the back cover was removed in one motion, today a non-removable battery requires a careful opening of the case with special tools and heating devices, the need for this procedure occurs most often when the battery is critically bloated, completely degraded or moisture enters the device.

Before you start physical intervention, it is important to be aware of the risks: self-disassembly almost always leads to the loss of the official warranty, and careless actions can damage the display plumes or the motherboard itself. Lithium polymer batteries can ignite when punctured or heated, so all work should be carried out only on a non-combustible surface in a well-ventilated room. If your device is still in warranty service, it is better to contact an authorized service center, rather than try to solve the problem yourself.

However, if the warranty period has expired and the cost of repairing the service seems to be unnecessarily high, you can replace or remove the battery on your own, following strict technology. In this guide, we will detail the preparation stages, the heating process of the adhesive, the technology of safely disconnecting the plumes and direct removal of the battery. Attention to detail at each stage will preserve the functionality of your Redmi and avoid costly breakdowns.

Diagnosis of the state of the battery and the need for retrieval

The first step before any work is to make a precise diagnosis that the problem is the power supply. Often users confuse software failures or problems with the motherboard's charge controller with physical wear and tear of the battery. A clear sign of the need to replace is visual bloating when the back cover or screen begins to move away from the frame, or a sharp drop in capacity when the phone turns off at 20-30% charge.

For a more accurate assessment, you can use the built-in diagnostic tools of the MIUI system. Go to the dial menu and type ##6484## to start the CIT engineering menu. Here you can check the battery voltage, its current temperature and connection status. If the system reports a battery check error or the temperature rises abnormally fast even in a simple one, this confirms the need for intervention.

• 🔋 Dramatic reduction in battery life when flagship models hold less charge 4-5 screen-clock.
• 📉 Disconnection of the device when charged above 15%, indicating unstable voltage.
• 🔥 Strong heating of the lower part of the body in the battery location area even in the absence of resource-intensive tasks.

⚠️ Warning: If you notice that the battery is swelling and pressing on the screen or back, do not try to charge the phone or press hard on the body.

Tools and workplace preparation required

Qualitative disassembly of the Xiaomi smartphone is impossible without a special set of tools, since the design of the devices involves the use of refractory glue and screws of various standards. Conventional household tools such as knives or sewing needles are categorically not enough - they can damage internal components or leave scratches on the frame. You will need professional or semi-professional tools that will provide control over the process.

The glue that holds the battery and the lid softens at about 80-90 degrees Celsius. Using an open flame or too powerful heat sources without temperature control can damage the display (yellow spots) or deform the plastic elements of the housing.

To successfully complete the task, prepare the following set:

• 🔧 A set of Phillips screwdrivers (cross) of different sizes, necessarily magnetic, so as not to lose tiny screws.
• 💨 Plastic mediators (scapula) and suction cup for careful separation of the cover and snapping of plumes without damaging the insulation.
• 🌡️ Thermostatic dryer or heating pad for uniform heating of the perimeter of the body to the desired temperature.

Organize the workspace so that all the small parts are at hand. It is recommended to use a magnetic mat or sorting organizer for screws, as Redmi smartphones use screws of different lengths, and entanglement of their places during assembly can lead to a breakdown of the motherboard.

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Before starting disassembly, be sure to take a photo of each stage of disassembly and arrangement of the screws, this will help you not get confused when you reverse assemble the device.

The process of safe disassembly of the smartphone body

Start by turning the device off completely, and if the phone doesn't turn off because of a failure, press the power and volume button on the phone. 10-15 You're gonna have to force it to reboot, and then you're gonna turn it off right away. SIM-cards to relieve internal stress in the structure and access some screws if they are hidden under the tray.

The next step is heating. Warm up the perimeter of the back cover or screen evenly (depending on the design of your Redmi model) for 3-5 minutes. Keep the hair dryer 3-5 cm from the surface, constantly moving it to avoid local overheating. After heating, carefully insert the plastic blade into the junction between the frame and the cover, trying not to plunge the tool deeper than 3-4 mm, so as not to damage the tail of the side button or fingerprint scanner.

Once you remove the back panel (or screen), you'll have access to the internal layout, and the first thing you need to do is disconnect the battery from the motherboard, find the battery connector that's usually covered by a metal safety plate, unscrew the screws that hold the plate, remove it, and gently disconnect the battery plume with a plastic blade.

Only after the battery is turned off can you continue disassembling, removing the shields, unscrewing the boards and getting to the battery itself. Remember, while the plume is connected, there may be a residual charge on the board, theoretically capable of short-circuiting when carelessly touching metal parts.

Technology of extraction of glued battery

In modern models Xiaomi Redmi battery is attached to the body with double-sided tape or special glue around the perimeter. Just "dig" it can not - it will lead to deformation of the battery, which is strictly forbidden. To safely remove it, you need to soften the adhesive compound.

There are two main methods: reheat. Carefully warm up the area around the battery with a hairdryer, trying not to direct the flow of hot air directly to the bloated element (if it is bloated); The second method is the use of special solvents, such as isopropyl alcohol or B-7000 liquid, which are injected with a thin needle or syringe under the edge of the battery.

Once the glue has been softened, use a plastic card or a special blade with a line. Strip a line or a spatula under the battery, making sawing movements from side to side. Don't use metal objects! They can pierce the battery shell, cause a spark and fire.

⚠️ Warning: It is strictly forbidden to bend, pierce or severely squeeze the removable battery. Even a small spark inside the phone case can lead to instant lithium fire.

Typical errors and precautions

The most common mistake when removing a battery from Redmi is to rush and ignore the heat. Attempting to tear off a glued battery forcefully leads to the fact that along with the battery, part of the bottom panel is broken or the plume of the touchscreen, which often passes under the battery in modern thin models, is damaged.

Another critical mistake is to use the wrong tools: screwdrivers with magnetized tips should be used carefully, not bringing them close to the cameras and speakers, so as not to demagnetize them, and you should not use ordinary household knives to tweak the battery - the risk of short circuit in this case is up to 90%.

When working with new batteries, it is important not to remove protective films from the contacts prematurely and prevent moisture from entering. If during the dismantling you damaged the plume connecting the battery to the board, replacing the battery itself will not help - you will need to repair the power chains on the motherboard.

Recycling the old battery and installing a new one

Once an old battery has been successfully retrieved, it becomes a question of recycling it, throwing lithium polymer batteries into a regular garbage can is prohibited by environmental regulations in most countries, because they contain toxic substances, and handing over the old battery to a special battery reception center or a service center.

The new battery is installed in reverse order. Before sticking, make sure to check the new battery's performance: connect the plume to the board without gluing it, and try turning on the phone. If the device responds to charging and turns on, you can apply a new adhesive (double-sided tape or B-7000 glue) and fix the cell.

When assembling the case, make sure that the plumes are positioned correctly, so they don't have to be twisted or clamped. After assembly, calibrate the battery: discharge the phone to 0% and charge to 100% when off so that the power controller correctly displays the charge level.

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Proper disposal of the old battery and calibration of the new one are the final steps to ensure the safety and long life of your Xiaomi Redmi.

Frequently Asked Questions (FAQ)