How to remove the battery from the phone Xiaomi Redmi Note 8 Pro

Xiaomi Redmi Note 8 Pro has proven to be a reliable device, but over time, any lithium-ion battery loses its capacity. If your phone starts to quickly discharge or turn off at 20% charge, it is likely time to replace the battery. Self-replacement is a complex process that requires accuracy and special tools, since the design of the device does not require easy access to internal components.

Unlike the older models, the battery is glued to the body with a powerful adhesive compound, and the back cover is made of glass, which greatly increases the risk of damage if you unskillfully open it. You will need not only a new battery, but also a set of precision screwdrivers, a suction cup, plastic blades and, preferably, a thermophen or heating pad to soften the adhesive. Ignoring safety rules can cause the plumes to fail or even fire the damaged element.

Before you start disassembling, make sure you have a good lighting workplace and a magnetic rotor map, as there are many and varying lengths of screws in the device. It is important to remember that any interference with the design of the smartphone automatically deprives you of warranty service if the warranty period has not expired. In this article, we will discuss each step in detail to minimize the risks and successfully perform the procedure.

Tools and workplace preparation required

Quality training is half the success of the operation. With the Redmi Note 8 Pro, you will need a specialized toolkit, as conventional household screwdrivers can damage screw hats or break threads. The main tool will be a set of precision screwdrivers, which must necessarily contain cross bits of the size of the PH000 and PH00, as well as a flat screwdriver for accurate tweaking of plumes.

It's critical to use a heat source to separate the glass back cover. A household hair dryer may not be able to do the job, so professionals use a thermophen or a special heating pad (separator) to warm the perimeter of the device to 80-90 degrees. This softens the B-7000 factory glue that holds the glass.

⚠️ Warning: Never use an open fire (lighters, candles) to heat the case.Local overheating can damage OLED-display or cause battery bloating, which will lead to dangerous consequences.

You will also need plastic tools to open: mediators, shoulder blades or special cards. Metal objects are not recommended, as they can easily damage the internal plumes or short contacts on the board. To work with the glue, stock up on isopropyl alcohol and a new adhesive compound (B-7000 or T-7000) for final assembly.

Organize the space so that small parts don't get lost. A magnetic mat or a piece of paper with painted sectors for screws in different stages of disassembly will help you not confuse the fasteners when you reverse assemble. Safety above all else: make sure that your hands are free of static electricity, which can damage sensitive electronics.

Removal of the back glass cover

The first and most important step is to dismantle the back panel. Start by removing the tray for the back panel. SIM-To provide ventilation and to relieve the internal stress in the case, then turn on the device and heat the perimeter of the back cover during the 3-5 minutes, evenly distributing heat over the glass surface, especially in corners where the glue is usually the most.

Once heated, take a suction cup, attach it to the bottom of the back cover, and pull it up slightly, creating a microscopic gap between the glass and the frame. Insert a plastic blade or a thin mediator into the resulting gap gently. Don't try to unplug the lid right away, move forward by driving the blade along the perimeter.

• 🔥 Heat the body evenly, avoiding focusing heat on one point for more than 10 seconds.
• 🛠️ Use a thin mediator to cut the adhesive layer rather than tearing the glass by force.
• ⚠️ Be very careful in the area of the camera module, there are plumes that are easily damaged.
• 💧 If the glue does not lend itself, add a drop of isopropyl alcohol to the incision to dissolve the composition.

When you pass the entire perimeter, the lid should be easy to separate, put it with the outside down on the soft cloth so that the glass doesn't scratch, and now you have access to the insides of the smartphone, where you can immediately catch the eye. NFC-antenna and protection of the main components.

Dismantling the protective plate and disconnecting the plumes

Under the back cover, you'll see a plastic or metal plate covering the mainboard and the battery, and it's mounted with a lot of screws of different sizes. Look carefully at the fasteners, some screws can be hidden under stickers or have different lengths. Unwrap them in sequence, folding them into the appropriate sectors on the magnetic mat.

Once the plate is removed, you will have access to the top plume that connects the main board to the bottom (where the charging connector is located). The first thing you need to do is turn off the battery to shut off the device and avoid short circuits when working with other components. Use a plastic blade to snap the battery connector.

⚠️ Warning: You need to turn off the plumes strictly perpendicular upwards, swinging the connector from side to side is impossible. Mechanical stress can break the contact pads on the board, which will require expensive soldering repairs.

Then turn off all the other visible plumes that go to the main board: the display module, the button plume, the camera and the antenna contacts. Carefully remove the vibrator and the main camera if they interfere with access to the bottom of the case, you can now twist the screws that hold the bottom plastic frame, and remove it, having full access to the battery.

Removing the old Redmi Note 8 Pro battery

The battery in the Redmi Note 8 Pro occupies almost the entire interior area and is firmly glued to the middle frame. It can't be pulled out just like that - there is a risk of damaging the battery shell, which can cause fire. Removal will require heating again. Turn the phone down with a screen (pre-protecting the display if it's still in place, or simply putting it on a soft surface) and heat the battery area through the back of the case or through an open space if the frame allows.

After warming up (about 5-7 minutes), try to move the battery carefully. If it does not move, use special plastic cards or thin blades soaked in alcohol. Driving the tool under the battery, cutting off the adhesive layer. Act slowly, without sudden jerks. Deformation of the battery housing is unacceptable.

If the battery is swelling, be especially careful: a puncture of the shell will cause an instant ignition of the electrolyte, in which case you need to heat the device minimally, and remove the element with utmost care, using tweezers behind the edges where there are no contacts. After extracting, clean the landing place of the remnants of old glue with alcohol and a lilaceless wipe.

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The rule of thumb is, take your time. A damaged battery is a fire risk, and a damaged display plume is an expensive screen replacement.

Installation of a new battery and final assembly

Before installing a new battery, check its voltage with a multimeter if possible. It should be in the working range. The new battery should be glued to double-sided tape (usually complete with a repair kit) or apply a thin layer of glue B-7000 around the perimeter. Do not glue the center part where the cells are located.

Carefully insert the battery into place, matching the receptacle to the bottom board. First plug the battery connector until the characteristic click, but don't turn on the phone yet. Make sure the battery is flat and doesn't stick out. Now you can assemble the device in reverse order: set the bottom bezel, plug all the plumes, screw the protective plate.

• 🔋 Check that the battery connector is snapped to the end, otherwise the phone won't turn on.
• 🔩 Twisting the screws cross-cross to ensure uniform fit of the plates.
• 🧹 Remove all villi and dust from the case before the final sticker of the back cover.
• 🧪 Degrease the frame of the case and the back cover with alcohol before applying new glue.

Apply the B-7000 glue to the body frame with a thin, continuous line, attach the back cover, press it tightly around the perimeter, and lock the phone with stationery gums or in a special press for 30-60 minutes until the glue is completely dry, and it is better to turn on the device after full polymerization of the glue to check the performance of the touchscreen and the pressurized display.

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After replacing the battery, be sure to calibrate: discharge the phone to 0% (until it turns off), then charge up to 100% when it is off, which will help the power controller correctly display the charge level.

Possible problems and solutions

Even with a careful assembly, there can be unexpected situations: If the phone shows charging after turning on, but does not turn on, check the density of the battery connector. Often the problem lies in a forgotten screw that prevents the plume from standing in place, or in a damaged contact when a sloppy snap is taken.

Another common problem is the lack of response to charging, which can indicate a malfunction of the bottom plume (sub-board), which is often changed along with the charging connector, or a failure of the power controller on the main board. SIM-map, check antenna contacts that may have shifted during assembly.

⚠️ Warning: If the phone starts to warm up in idle mode after assembly, turn it off immediately.This may indicate a short circuit inside the case or improper battery installation.

If the display starts to work incorrectly (there are stripes or touchscreen "glutch"), most likely, the display plume was damaged or it is not tightly connected enough. Disassemble the device again and reconnect all the connectors, paying special attention to the condition of the connectors themselves.

Frequently Asked Questions (FAQ)