Replacement of the battery in Xiaomi Redmi 8 Pro: a detailed analysis

Smartphones line Xiaomi Redmi are famous for their reliability, but even the highest quality lithium-ion batteries over time lose capacity. Owners of the model Redmi 8 Pro often face a situation when the device stops holding charge or turns off in the cold. Self-replacement of the battery is a real opportunity to extend the life of the gadget and save a significant amount of money on the services of the service center.

However, the process of retrieving the battery in modern smartphones comes with certain risks. The design of the Redmi 8 Pro involves the use of adhesive joints and dense layout of internal components. Wrong actions can damage the plumes, screen or even fire the battery. So before you start work, you need to carefully study the theoretical part and prepare all the necessary tools.

In this article, we will take a detailed look at each step of the procedure, paying special attention to safety, you will learn how to warm up the case, than to unplug the back cover and how to properly disconnect the battery from the motherboard. Following the instructions will help you avoid common mistakes and perform the replacement efficiently.

Preparation of the workplace and necessary tools

The quality of the repair depends on how well you've prepared for the process, and you'll need not only a new battery, but also a specialized toolkit, and using inappropriate items like knives or pins can short circuit or cause physical damage to the body.

Organize the workspace so that all the details are on hand and not lost. Small screws are easily lost, so it is recommended to use a magnetic mat or container with cells to sort the fastener by dismantling stages. The lighting should be bright and directional so that you can see the smallest details of the construction.

To work with Xiaomi Redmi 8 Pro, you will need the following set of tools:

• 🔧 A set of screwdrivers with bits Phillips (cross) and Pentalobe (if required for specific screws).
• 🔥 A hair dryer or thermophen (a professional heating pad can be used) to soften the glue.
• 🃏 Plastic cards, mediators or suction cup for opening the case.
• 🧤 Antistatic gloves and tweezers with dielectric tips.
• 🧴 Isopropyl alcohol or special solvent for removal of glue residues.

⚠️ Warning: Never use metal blades to lid around plumes! metal can damage thin tracks or puncture the battery itself, resulting in instant failure of the device.

Make sure the smartphone is completely off. Even when it's off, some circuits can be energized, so accuracy is paramount. Prepare a place to store the removed back cover in advance so that it doesn't get dust or moisture.

Safety technique when working with lithium-ion batteries

Battery management requires strict safety regulations: Lithium-ion batteries contain chemicals that can react with oxygen if damaged, and if the battery case fails, it can ignite or explode.

If you notice that the old battery is swelling, be especially careful when removing it. The pressure inside the swelled battery is elevated, and any puncture can become fatal. In such cases, it is recommended to use additional protective measures, including glasses and gloves.

Basic safety rules when working with power sources:

• 🚫 Do not expose the battery to open fire or excessive heat (above 60)°C).
• 💧 Avoid getting moisture on the battery contacts and motherboard.
• 🔌 Do not close the contacts of the battery with metal objects (screwdrivers, tweezers).
• 🏗️ Do not attempt to disassemble or punctur the battery case.

It is also important to consider your health: If you have breathing problems, work in a well-ventilated environment, especially when using chemical solvents for glue. Isopropyl alcohol vapors can be harmful if you breathe in for long periods indoors.

Removal of the Redmi 8 Pro Rear Cover

The Redmi 8 Pro has a glass back mounted on a two-part glue, and to remove it without damage, you need to preheat the perimeter of the device, which will soften the glue and allow you to carefully separate the glass from the frame.

Use a hair dryer, evenly warming up the edges of the smartphone during 2-3 Do not hold the hair dryer in one place for too long, so as not to overheat the display matrix or internal components. 80-90 degrees Celsius.

After heating up, act on the following algorithm:

1. Install a suction cup at the bottom of the back cover, closer to the Xiaomi logo.
2. Slightly pull the suction cup upwards, creating a small gap between the glass and the frame.
3. Insert a thin plastic card or mediator into the resulting gap.
4. Carefully keep the map along the perimeter, cutting the adhesive layer.

Pay special attention to the corners of the device, because there is usually the most glue. Don't use excessive force. If the lid does not lend itself, it is better to reheat the body with a hairdryer than risk the integrity of the glass. The back cover in the Redmi 8 Pro is also a decorative element, and its chips will immediately catch your eye.

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To make the glue clear easier, you can pre-drip a little isopropyl alcohol into the gap before you map, which will speed up the process and reduce the risk of glass breaking.

Disassembly of the internal structure and disconnection of plumes

After successfully removing the back cover, you will see the smartphone’s internal device open up, the battery is used most of the time, but access to it is blocked by a metal protective plate and plumes. In the Redmi 8 Pro, the camera module and fingerprint scanner can also interfere with access.

The first thing you need to do is unscrew all the visible screws that hold the protective plates, which usually range from 10 to 15. Stack the screws in the order of removal, because they can be of different lengths and threads. Using a long screw in the hole for a short one can damage the motherboard.

And then there's the critical step, which is to turn off the plumes.

• 🔌 The main camera module plume.
• 🔌 Fingerprint scanner plume (located under the camera).
• 🔌 Lower board plume (charge connector).
• 🔌 Antenna cable (if it passes over the battery).

Use a plastic blade to turn off the plumes. Push the connector up vertically, avoiding lateral movements that could break the contacts. After turning off all interfering elements, remove the metal protective plate covering the top of the battery.

⚠️ Warning: Before touching any internal components with your hands, touch a grounded metal object to remove static electricity. A static discharge can disable the motherboard's sensitive electronics.

In some versions of the Redmi 8 Pro, the display plume can pass under the battery or be very close to it. Make sure you don't touch it when you remove the old battery. If the plume is glued, it needs to be carefully separated, preheated.

Removing the old battery and installing a new one

The hardest part is the direct extraction of the battery. In the Xiaomi Redmi 8 Pro, the battery is attached to double-sided tape around the perimeter and may have latching tongues. You can't just pull it, because there's a high risk of deformation.

There are two main ways to extract it: One is to use special hoods with suction cups; the second, safer for the integrity of the battery (if you plan to dispose of it), is to use a thread or fishing line. The thread is carefully sawed with the adhesive layer under the battery, moving it from side to side.

Procedure for replacement:

1. If the battery has a tongue to retrieve, pull it slowly and evenly.
2. If the tongue is not, apply a little isopropyl alcohol under the edges of the battery (using a syringe without a needle).
3. Wait 2-3 minutes until the alcohol dissolves the glue.
4. Carefully tuck the battery with a plastic card and remove it.

The new battery should be exactly the same model as the old one. Pay attention to the labeling and capacity. Be sure to clear the seat of the old glue before installing. Use special adhesive tapes B-7000 or double-sided electronics tape to fix the new element.

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The main rule of installation: never glue the battery firmly with superglue! In the case of future replacement or bloating, this will make extraction impossible without damaging the housing.

Set the new battery tightly at the edges. Make sure the battery connector reaches the relay portion of the board. Don't turn on the smartphone right away -- first assemble the device back.

Device assembly and initial calibration

The assembly is done in reverse order. First, connect the battery connector to the motherboard. You should hear the characteristic click confirming that the connection is reliable. Then connect all the other plumes that were disconnected earlier.

Put the metal plates in place and twist all the screws. Make sure that no antenna wiring is pressed or clamped. Then you can start sticking the back cover. Put a thin layer of glue around the perimeter of the frame or use a new adhesive pad.

After assembly, calibrate the battery to correctly display the charge:

• 🔋 Discharge the smartphone before completely switching off (0%).
• 🔌 Put on charging in the off state to 100%.
• ⏳ Keep it on the charger for more. 1-2 hour 100%.
• 🔄 Make a forced reboot (clamping the power button).

This procedure will help the power controller calibrate data about the actual capacity of the new cell, and in the early days of use, the phone may get a little warmer — a normal process for the formation of battery chemistry.