Xiaomi’s modern smartphones are famous for their autonomy, but over time, even the most capacious batteries lose their original capacity. If your device stopped holding a charge, quickly discharges in the cold or turns off at 20-30%, it’s probably time to replace the energy source. Owners often wonder whether it is possible to carry out this procedure on their own at home without contacting service centers.
The battery replacement process requires precision, a dedicated tool, and an understanding of the smartphone. Unlike older models with removable covers, modern Redmi, Poco and Mi series flagships have a single case held together by glue, making it difficult to access internal components, but not impossible for a trained user to replace.
Before starting a disassembly, you need to weigh all the risks: improper actions can damage the plumes, screen or even fire a damaged battery. In this article, we will discuss in detail how to remove the battery on Xiaomi safely, what tools you will need and what nuances should be paid special attention to during the work.
Diagnosis and signs of wear of the power element
Before you disassemble the device, you should make sure that the problem lies in the physical wear of the chemical current source. Often users confuse software failures with battery degradation. The main symptom is a sharp drop in charge: for example, the phone shows 40%, and after a minute suddenly turns off or goes to 5%.
Visual inspection can also tell you a lot about the condition of the component, because if the back cover starts to move away from the body or the screen slightly lifted, this is a sure sign that the battery is swelling. Internal gases generated by chemical reactions, burst the battery housing, which creates dangerous pressure on the display matrix and the plumes.
- 🔋 The smartphone turns off when charged higher 15-20%.
- 📉 Charging occurs unevenly: quickly dialed up to 80% and very slowly to 100%.
- 🌡️ The device is strongly heated in the area of the camera or center of the body, even in simple conditions.
- 📱 The appearance of artifacts on the screen or detachment of the display due to pressure from the inside.
For accurate diagnosis, you can use special applications such as AccuBattery or built-in Android engineering menus. However, the most reliable result is only a physical examination and measurement of stress under load. If you notice any of these symptoms, further operation may not be safe.
Tools and workplace preparation required
A good battery replacement is impossible without the right tools. Attempts to open the case with a knife or credit card often end up with damage to the frame or chipped glass. You will need a set of precision screwdrivers, since the screws in Xiaomi smartphones can come in different sizes and types of slits.
Special attention should be paid to the heating equipment. The glue holding the back panel and the battery itself is very strong at room temperature. Thermophen or, in extreme cases, a hot heating pad is used to soften the adhesive. It is important not to overheat the device so as not to damage the device. OLED-matrix.
☑️ List of disassembly tools
The workplace should be well lit and organized. Small screws are easy to lose, so it is recommended to use a magnetic mat or container with cells, marking where each fastener was twisted from, and there should be an isopropyl alcohol at hand to dissolve the old glue and a new adhesive layer for assembly.
The process of disassembling the smartphone body
The first step is always to remove the tray. SIM-This is a mandatory procedure that avoids accidental damage to the internal machinery and gives a point of support when removing the back cover. 2-3 minutes, evenly distributing heat.
When the body is warm enough, use a suction cup to create a small gap between the frame and the back panel. Insert a plastic mediator into the resulting gap, and, as you make sliding movements, walk around the contour of the device, cutting the glue layer. Do not enter the tool too deeply so as not to touch the plumes going to the side buttons or the fingerprint scanner.
⚠️ Warning: If you feel strong resistance to trying to open the lid, stop the efforts and add more heat.Forced opening of the cold housing is guaranteed to lead to cracks in the glass.
When you successfully remove the back, you get access to the interior layout. In most Xiaomi and Redmi models, you'll see a plastic or metal plate covering the bottom of the motherboard and the plumes. It's mounted on several screws that you need to unscrew. Be careful with screws of different lengths, because if you mix them up when you build them, you can damage the thread in the board.
Dismantling of the old battery
Removing the battery is the most critical step in the entire operation, and in modern smartphones, it's glued tightly to the frame with double tape, and simply pulling it out with your fingers or with a tool can cause the battery to puncture, which can ignite lithium.
First, you need to disconnect the battery plume from the motherboard, carefully bend the connector lock (if you have one) and slap the connector with a plastic blade. Never use metal tools to turn off the plumes, as this can cause a short circuit on the board.
There is a proven method of extracting the battery itself, using a thread or a special tape, which is applied under the battery from one of the corners (where there is a small gap) and cuts the glue layer with sawing movements from left to right, which takes patience and takes 5 to 10 minutes.
- 🧵 Squeeze a thin thread or fishing line under the edge of the battery.
- ↔️ Move the thread from side to side, gradually moving deep under the battery.
- 🔥 Periodically slightly warm the back of the body if the glue hardens again.
- 🚫 It is strictly forbidden to bend, pierce or severely deform the removable battery.
If your Poco or Mi battery has a special pull-tabs, use them. However, often these tongues break off, and the filament method remains the only safe option. Once removed, clean the seat of the old glue with alcohol and soft cloth.