Replacement of the battery on Xiaomi Redmi Note 8T: a step-by-step guide

Smartphone Xiaomi Redmi Note 8T has proven to be a reliable device, but over time, even a quality lithium-polymer battery loses capacity. If your device stopped holding the charge, turns off in the cold or inflated, it's time to think about replacing the power unit. Self-repair allows you to save a significant amount and extend the life of the gadget for several years of active operation.

The replacement procedure is not trivial, as the Redmi Note 8T has a glass back cover and a tightly packed body.You will need accuracy, a specialized tool and an understanding of the physical processes occurring inside the device.

In this article, we will take a look at every step from the workplace to the final calibration of the new battery, how to safely heat the adhesive layer, unplug the plumes, and properly install the new battery, and following the instructions will help avoid common errors that often lead to damage to the display or motherboard.

Diagnosis and selection of components

Before you start disassembling, you need to make sure that the problem is the physical wear of the battery, not a software failure or a malfunction of the power controller. Typical symptoms of degradation of the Li-Po battery are rapid discharge, surges in percentages of charge and heating of the body in the area of the camera. Sometimes the battery can swell, as you can see from the detachment of the back cover or the extruding of the display.

When choosing a new battery for the Xiaomi Redmi Note 8T, it is important to pay attention to the marking and capacity. The model's original capacity is 4000 mAh. There are many copies on the market that can not only fail quickly, but also damage the phone. Look for models with overheat protection and a built-in charge controller.

• 🔋 Original – has a Xiaomi logo, clear engraving and weight around 80-90 gram.
• ⚠️ Quality copy – may work normally, but charge cycle life is usually 30 times lower%.
• 💣 Cheap analogue – often without a protective fee, which creates a risk of bloating and fire.

Pay attention to the connection connector. Although standards are often uniform, the Redmi Note 8T uses a specific location of the plume. A mismatched battery may simply not fit in the designated area or require the plume to bend, which is unacceptable.

Tools and training required

To make a successful repair, you'll need a minimal set of tools that you can buy from any electronics store or order online. Lack of tools often leads to damage to the body or injuries. The main enemy when disassembling is static electricity and fragile glass.

You will need a dryer to heat the glue, a suction cup to open the case, thin plastic mediators (scapula) and a set of screwdrivers. Use metal tools with extreme caution so as not to damage the internal components or break through the battery itself.

Special attention should be paid to the organization of the workspace. The desk should be clean, well-lit and not have a fuzzy coating. It is recommended to use a magnetic mat to sort screws, as there are many of them in the Redmi Note 8T, and they differ in length and diameter.

⚠️ Warning: Never use a knife or blade to pluck a glass lid.One wrong move will cause a crack and the phone will lose its tightness and aesthetic appearance.

The process of disassembling the Redmi Note 8T

Start with extraction. SIM-This is a must, because the screws can be underneath or next to it, and then you have to warm up the perimeter of the back cover, and the glue that the manufacturer uses becomes elastic at a temperature around the back. 80-90 degrees Celsius.

You need to warm up evenly, driving a hair dryer around the perimeter for 2-3 minutes. Do not hold the hair dryer at one point for too long, so as not to overheat the display matrix on the back side. Once the body is warmed, install a suction cup at the bottom of the back cover and gently pull up, creating a gap.

Insert a plastic mediator into the gap, drive it along the edges, cutting the adhesive layer, at the top, in the area of the camera module, be very careful, there are plumes, do not enter the tool deeper than 3-4 mm, so as not to damage the internal components.

When you take the lid off, you'll see a metal screen covering the motherboard, and it's mounted with a lot of screws of different calibers. Unscrew them in sequence, starting from the center or corners, folding the screws in the order of removal. Remove the metal plate and put them aside.

Dismantling an old battery and installing a new one

Now you have direct access to the battery. In the Xiaomi Redmi Note 8T, the battery is glued to the frame with double-sided tape. The first thing you need to do is to disconnect the battery plume from the motherboard. Do this carefully by putting your nail on the connector or using a plastic blade.

Removing the old battery often requires heating again, but locally, in the battery area, and you can use special hoods with suction cups, if you have them, if you don't have suction cups, carefully shovel the battery on different sides, trying not to deform it.

• 💡 Heat - softens the glue, making it easier to remove.
• 🧵 Thread is an advanced method: dental floss is wound behind the battery and the sawing movements cut off the glue.
• 🧪 Alcohol - isopropyl alcohol poured around the edges helps dissolve the adhesive.

Clean the seat of the old glue. The surface should be smooth and clean. Apply a special glue B-7000 or double-sided phone tape on the new battery. Don't use superglue (cyanacrylate) - it breaks down plastic and can damage new elements in future repairs.

Set the battery, press it for a few minutes to lock it, and plug the plume until you click it, make sure the plume is flat and not squeezed, and you can turn on the phone temporarily without fully assembling it to check if it's working.

⚠️ Attention: If the battery is bloated, it is strictly forbidden to pierce it or expose it to strong mechanical influence.

Assembly of the device and checking leakage

Once you make sure the phone turns on, holds a charge and responds to touch, you can start the final assembly. Wipe the inside of the back cover and the dust frame and degrease the edges with an alcohol napkin for better adhesion.

Apply a new layer of glue around the perimeter of the frame. Carefully align the lid with the body, starting with the top (camera), and press tightly around the perimeter. You can use stationery gums to fix it, wearing them cross-to-cross for 15-20 minutes.

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Use a thin layer of B-7000 glue, and the glue that is exposed to the outside is easily removed with a cotton swab soaked in alcohol until the glue is frozen.

Once the glue is dry, spin all the screws of the metal screen in reverse order. SIM-Turn on the device and run a primary diagnostic.

Calibration and Frequently Asked Questions

After the battery is replaced, the system may not correctly display the percentage of charge. To allow the power controller to "remember" the new capacity, it is recommended to calibrate. Completely discharge the phone before turning off, then charge when off to 100%.

After reaching 100%, hold on to charging for another hour. Then turn on the phone. If the charge drops, charge again to full stop. Repeat the procedure 2-3 times. This will help the system recalibrate the charge indicators.

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Replacing the battery gives the smartphone back 90% of its original autonomy, making it cost-effective to repair compared to buying a new device.

Replacing the battery with the Xiaomi Redmi Note 8T is a careful procedure, but it is easy to do at home, taking your time, using the right tools and following the right safety precautions, and replacing it correctly will allow your device to serve as a true believer for a long time.