Replacing or removing the battery in Xiaomi smartphones is a procedure that may be required both in scheduled repairs and in emergency cases, such as when the battery is bloated or deep discharge. Modern devices of the Chinese manufacturer often have a fixed design, which requires the user to be certain accuracy, the presence of a specialized tool and understanding the internal device of the gadget.
Unlike older models with plastic covers, where the issue was solved in seconds, in the current Redmi and Mi lines (and now Xiaomi series 13, 14), access to the energy module is hidden under a glass or ceramic back panel planted on glue. Wrong actions can damage the display or plumes, so it is important to follow the algorithm clearly.
In this article, we will discuss in detail the dismantling process for different types of housings, consider the features of adhesive joints and explain how to safely disconnect the power connector from the motherboard without the risk of short circuit.
Preparation of the workplace and tools
Before you start disassembling, you need to have a safe space, you need a clean surface, preferably with an antistatic coating or just dry, so you don't lose small screws, and the lighting needs to be bright, because some fasteners and plumes are microscopic.
To work, you will need a standard set of electronics repair wizard tools, and the lack of specialized devices can cause damage to the case or injuries.
- 🔧 Torx screwdriver set (usually) T2, T3, T5) cross-block (PH000) screw-twisting.
- 🌡️ Thermal dryer or heating pad for softening the glue under the back cover.
- 💳 Plastic card or mediator for neat opening of the case.
- 🧲 Magnetic mat for sorting screws of different sizes.
Pay special attention to the state of the battery before work begins. If you see bloating, you should work with the utmost care not to punctur the lithium polymer cell shell.
Features of the design of Xiaomi smartphones
Xiaomi engineers use different layout schemes depending on the price segment and year of release of the device. In the budget models of the Redmi Note series, there is often a plastic rear, which is easier to remove, but it still rests on latches and glue.
Flagship models like the Xiaomi 13 Pro or Mi 11 have glass rear panels glued around the perimeter. Inside the case, the battery can be fixed in two ways: on double-sided tape or using special hoods (pull-tabs).
It is important to understand that the motherboard in most modern Xiaomi models is at the top, and the battery occupies the lower and central zones, and between them are the plumes of the display and cameras, which require special care when dismantling.
⚠️ Note: In some models, the screws of the lower board mount may be of different lengths, and if they are confused during assembly, you can damage the internal components or penetrate the body through.
Removal process of the back cover
The most critical step is opening the body, and first you have to turn off the device and remove the tray. SIM-Next, warm up the perimeter of the back cover. 80-90 degrees Celsius, so as not to damage the oleophobic coating or the display itself on the back side.
After warming up, insert a mediator or a thin plastic blade into the gap between the frame and the lid. Move the tool around the perimeter, cutting the adhesive layer. Don't try to fit the lid in one place - the glue should be released evenly.
If the lid doesn't lend itself, add a little more heat. The use of force is unacceptable, as the glass can crack and the fragments damage the battery or other components.
- 🔥 Warm up the edges. 30-40 second-on-side.
- 🪒 Move the mediator progressively without making sharp jerks upwards.
- 🧩 If you have a suction cup, use it to create the initial gap.
Once the lid is successfully removed, put it in a safe place, and now you have access to the insides, but it's too early to remove the battery.
Dismantling of protective panels and disconnecting plumes
The battery in Xiaomi smartphones is usually covered with a plastic or metal protective plate, which is also part of the heat removal system, and this plate is attached to many screws of different calibers.
You need to unscrew all the visible screws that lock the middle frame or directly protect the battery. Use tweezers to carefully remove the fastener. Once the protection is removed, the battery connector will be accessed.
Turning off the plume is the most important technical thing: you can't pull the wires on the battery connector, you need to use a plastic blade or nail to plug the connector from the bottom up, snapping it away from the back of the board.
☑️ Disconnection procedure
Only after the plume is physically turned off can the device be considered de-energized, which is critical for the safety of further work.
Removal of the battery from the housing
Now that the battery is not connected to anything, you can start removing it, and depending on the model, it can be held on a powerful double-sided tape or have special tongues for pulling.
If the tongues are not present (which is often the case in older or budget models), you will need to reheat the area under the battery through the front or back (if the design allows), then, using a plastic card, gently tuck the battery, moving from the bottom edge to the top.
Do not use metal tools (tweezers, screwdrivers) to smack the battery. Puncture of the battery housing will cause it to ignite. Act slowly and smoothly.
| Smartphone model | Type of AKB anchorage | Location of the plume | Difficulty withdrawal |
|---|---|---|---|
| Redmi Note 10 | Adhesive tape + tongues | Upstairs. | Medium |
| Xiaomi Mi 11 | Strong glue across the square | Side (L-shaped) | Tall. |
| Poco X3 Pro | Double-sided scotch | Upstairs. | Low. |
| Redmi 9A | Protective frame + glue | Upstairs. | Low. |
Once removed, inspect the compartment for glue residues, which must be removed before installing the new element to ensure a tight fit.
What to do if the battery is swelling?
Installation of a new element and assembly
Before installing a new battery, make sure that its capacity and model are fully consistent with the original. Using cheap analogues can lead to unstable operation of the power controller.
Stick new strips of double-sided tape onto the body or use a special B-7000 glue (in small amounts).Put the plume into the connector until the characteristic click, then install the protective plate and twist the screws.
When assembling the case, make sure that all the display plumes and buttons are in their channels and are not clamped. The back cover before gluing is also desirable to warm up and degrease with alcohol.
- 🧹 Degrease contact surfaces with alcohol.
- 🔋 Check the voltage of the new battery with a multimeter (should be around) 3.7-4.2V).
- 🔩 Swirl the screws cross-cross for a uniform pinch.
⚠️ Warning: Do not turn on the smartphone immediately after assembly. Let the glue and sealant freeze for a period of time. 1-2 hours to ensure the tightness of the body.
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Use rubber harnesses or weights to tightly press the cover during the glue solidification, but do not overdo the pressure on the screen.
Frequent errors and precautions
Beginners often make the mistake of trying to remove the battery immediately after removing the lid, forgetting to turn off the plume.This can cause a short circuit on the board, which will disable the power controller or the motherboard itself.
Another common problem is damage to the touchscreen plume or display when it is unsavoryly opened. The screens in modern Xiaomi are very fragile and expensive to replace.
Also worth remembering is static electricity: work in antistatic gloves or periodically touch grounded metal objects to take charge off the body.
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The main risk of self-replacement is damage to the plumes and violation of the tightness of the body, which reduces the moisture protection of the device.