Xiaomi smartphones are famous for their performance and autonomy, but over time, even the best-quality lithium-polymer battery loses capacity. When the device stops holding charge or turns off by 20-30%, it becomes necessary to replace the battery. However, before starting to replace, you need to clearly understand how to remove the old battery without damaging the fragile plumes or the device body.
Unlike older models with removable covers, modern gadgets require careful opening and the use of special tools. The dismantling process can vary significantly depending on what kind of device you have: a budget Redmi with a plastic back panel or a flagship Mi with a glass lid on glue. Wrong actions can lead to a battery break or damage to the display, so it is important to follow the sequence of operations.
In this article, we will take a look at all the stages of preparing and extracting a power source, and also pay attention to the critical nuances of safety, you will learn what tools will be required for work and how to avoid the common mistakes that beginners often make when first repairing.
Design evaluation and workplace preparation
The first thing to do before you start any manipulation is to determine the type of design of your smartphone. In most modern Xiaomi models, the back cover is glued around the perimeter, which requires heating and neat detachment. In older or budget versions, the lid can be fixed with latches, but even there is often adhesive base.
You need to organize the workspace so that all the small parts are visible and not lost. It is best to use an antistatic mat or a clean, dry surface with good lighting. The small screws that will be twisted in the process should be folded into separate containers, signing them so that you do not confuse the lengths during assembly.
It's important to remember that lithium batteries are sensitive to puncture and bending. Any damage to the battery casing can lead to fire or a chemical reaction. So all movements must be smooth, without sudden jerks and undue pressure on the internal components of the device.
⚠️ Before starting work, be sure to make sure that the battery level does not exceed 25%.A fully charged battery can break out more likely if damaged than a partially discharged battery.
To do this successfully, you'll need a toolkit that you can buy from any electronics or radio store. Don't try to replace your battery with just a scissor or a kitchen knife, which is guaranteed to break.
- 🔧 Precision screwdriver kit (cross-hatch) PH000, PH00 Torx T4, T5)
- 🔥 A dryer or warmer for softening the glue (temperature near the 80-100°C)
- 🎴 Plastic blades and mediators for opening the body
- 🧲 Magnetic mat or organizer for screws
- 🧤 Protective gloves and glasses (to protect against possible sparks or chemicals)
Procedure for safe power outage
The most critical step in the replacement process is to properly disconnect the battery from the motherboard. Even after the smartphone is turned off on the button, the board remains residual voltage, and some circuits may be under waiting current. Ignoring this step can lead to a short circuit at the time of removal of the connector.
Once you've removed the back cover and accessed the insides, the first thing you need to do is find the battery plume, which is usually a wide connector, located on the top or bottom of the board, often covered by a protective metal plate or plastic lining, and you need to carefully unscrew the locking screws to access the contacts.
Use a plastic blade or a special non-conductive tool to detach the plume. Metal tweezers are strictly forbidden at this stage, as accidental closure of the contacts can disable the power controller. The movement should be directed upwards, without distortions and jerks.
☑️ Safety before retrieval
After the plume is turned off, it is recommended to wait about 1-2 minutes before further actions, this time is necessary for the capacitors on the board to completely discharge, only after that you can start dismantling the battery itself without fear of accidental surges of voltage.
Battery recovery technology depending on the model
The method of extraction depends on the series of your device. In the line of Redmi Note and Poco often uses a design where the battery occupies almost the entire area of the rear panel and is fixed by powerful double-sided tape. In the flagships of the Xiaomi Mi and Mi Mix series, access can be limited to additional modules.
First, remove all the screws that attach the battery to the frame. In some models, such as the Redmi Note 9 Pro or Xiaomi Mi 11, the battery can be additionally fixed with plastic tongues or glue strips below it. Carefully tuck the edge of the battery with a plastic card or a spatula, trying not to damage the neighboring plumes of the display.
A key feature of Xiaomi’s design is that it uses a very sticky glue that becomes viscous when heated. If you feel strong resistance, don’t pull the battery by force – add a little more heat with a hairdryer (without overheating the battery above 45°C) and use a dental floss or a special string to cut the adhesive layer.
| Model of the device | Type of fixation | Difficulty | Feature |
|---|---|---|---|
| Redmi Note 8/9/10 | Glue + screws | Medium | Glass back cover, fragile |
| Xiaomi Mi 9/10/11 | Strong glue | Tall. | Two-cell battery (double) |
| Poco X3/NFC | Glue + frame | Medium | Plastic cover, lots of screws. |
| Redmi 9A/10A | Latches + glue | Low. | Simple construction, easy access |
If the battery is two-part, which is often the case in fast-charging flagships, you need to turn off both plumes, sometimes they are combined into one connector, but the battery is physically divided into the upper and lower sections, in which case you need to remove them sequentially, starting with the part where the connector is located.
Working with glue layer and fixation
The main problem in removing the battery is the old, petrified glue. Trying to just pull the battery out often ends up with a deformation. Use the thread method to minimize the risks. Take a strong dental floss or a special fishing line, slice it under the corner of the battery and smoothly move from side to side with a "saw" adhesive layer.
When working with glue, it is important not to damage the touchscreen, which is located on the other side of the case. Excessive pressure on the screen during the picking of the battery can lead to spots (ink) or cracks in the matrix. If you feel that the screen is beginning to bend, immediately stop the pressure and add heat to the back wall.