Disassembling the popular Xiaomi Band 2 fitness tracker is often a necessary procedure when the device stops holding the charge or the screen goes out after moisture hits. Despite its compact size and apparent monolithic design, this gadget can be neatly disassembled at home, if you know the specifics of the mounts. The main feature of the model is the lack of visible screws and the use of a tight silicone strap that holds the main module.
Before starting work, it is important to understand that the tightness of the case will be broken, and the IP67 water protection will cease to function in the same volume. Restoring factory tightness without special equipment is almost impossible, so after repairing the device should be protected from water. However, if the bracelet is no longer turned on or the battery is swelling, there is nothing to lose, and a careful dismantling is the only chance to bring the gadget back to life.
In this guide, we will take a detailed look at the process of removing the tracker from the strap, opening the plastic case and replacing the main components. Following the sequence of actions and using the right tools minimizes the risk of damage to fragile plumes or plastic latches. The glue under the Xiaomi Band 2 screen becomes viscous, not liquid, which requires a special approach to unplug the display.
Tools and workplace preparation required
The quality of disassembly of electronics begins with the preparation of the right tools. To work with the Mi Band 2 you will need a minimum set that most home craftsmen will find, but the specifics of the silicone case dictates its conditions. The main difficulty is precisely the extraction of the tracker from an elastic material, since the landing is made very tight to ensure moisture protection.
You will definitely need a hair dryer to pre-heat the silicone, which will make the material more elastic and reduce the risk of rupture when removing the module. Also prepare a thin plastic blade or mediator, a metal needle and tweezers to work with small parts. Use of metal screwdrivers in the early stages is not recommended, as you can easily damage the case or scratch the display.
- 🔧 Hair dryer (construction or household) for heating the strap.
- 🛠 A thin plastic card or mediator for tampering.
- 📏 A thin needle or scalpel to access hidden elements.
- 🧲 Tweezers with thin curved ends for working with the battery.
Organize the workplace so that all tools are at hand and the surface is clean and well-lit. Small screws and parts are easily lost, so it is recommended to use a magnetic mat or fastener storage container. Safety is also important: make sure that the dryer does not overheat the table surface and sharp tools lie stable.
Removing the tracker from the silicone strap
The most time-consuming step that users face when trying to disassemble the Xiaomi Band 2 is to remove the main module from the silicone frame. The strap design is such that the tracker is inserted into it with great tension, and simple pulling often leads to silicone rupture or break the ears of the mount. To avoid damage, you need to act with cunning and temperature.
First, flip the bracelet up with the back and find an oval hole in the silicone that shows the pulse sensor, and that's the hole that we're going to be tapping into the module. Heat the area around the tracker with a hair dryer for 30-40 seconds to soften the silicone, but don't overdo it to keep the plastic from melting the device itself.
⚠️ Warning: Do not try to squeeze the module with nails or blunt objects without heating - this is guaranteed to break the silicone jumper, and the strap will have to be thrown away.
Once you warm up, take a thin plastic card or a special tool to open it, insert the edge under the end of the tracker on the side opposite to the sensor contacts, carefully press down and sideways, trying to push the module out of the socket, if the resistance is too high, repeat the heating procedure.
When one side of the module appears above the level of the strap, grab it with your fingers or tweezers and smoothly rock the device completely. Make sure there are no barbs left on the silicone that could damage the body when reassembled. The integrity of the strap is critical for comfortable wear, since the torn silicone will rub the skin.
Opening of the body and access to the insides
Once the tracker is removed, you have a monolithic plastic block that also has no visible screws, and the Mi Band 2 body consists of two parts connected around the perimeter by hidden latches and adhesives, and you will need to re-open the temperature and a thin tool.
Heat the perimeter of the device with a hairdryer, paying special attention to the side faces. Take a thin metal scalpel or a very thin screwdriver and carefully insert the stinger into the joint between the front panel (screen) and the back cover in the area of the charging contacts. Move the tool along the perimeter, turning it slightly to snap the internal locks.
So, you can do it without bigotry: the plastic in this model is quite fragile and can crack when you're bending, and your goal is to crack the body in a circle, and then the back cover is easily removed, and inside you'll see a battery pack that takes up almost the entire volume, and you'll see a control board with a display.
☑️ Pre-mortem checks
When removing the lid, be careful with the plume connecting the main board to the display if your revision design suggests it, although in Band 2 the screen is often glued directly to the frame. If the screen is glued to the front panel, then a sloppy opening can damage the matrix. It is better to warm the front part to soften the glue under the display if you plan to replace it.
Replacement of the battery and work with the battery
The most common reason for disassembling the Xiaomi Band 2 is the failure of the lithium polymer battery. Over time, the capacity falls, and the device stops holding charge even after short use. Inside the case, the battery is fixed to a two-way tape and connected to the board via a connector or solder (depending on the revision, soldering or a reliable connector is most common).
To remove the old battery, gently apply a plastic spatula or mediator. Do not use metal tools that can break through the battery shell and cause a short circuit or fire. If the battery is held tight, warm the back of the body slightly with a hairdryer to soften the adhesive base.
| Parameter | Meaning | Note |
|---|---|---|
| Type of battery | Li-Pol (Lithium-Polymeric) | It requires caution. |
| Capacity | 70mAh | Standard for Band 2 |
| Tension. | 3.7 B - 4.2 B | Operating range |
| Firming | Double-sided scotch | We need a new layer of glue. |
When installing a new battery, make sure that the polarity of the connection is observed correctly. If the contacts are soldered, use a soldering iron with a thin sting and a minimum amount of time to avoid overheating the board. To replace the battery, you should use a ready-made module with soldered contacts or a connector that matches the original.
Where can I find the right battery?
Once connected, check the device without fully assembling it. Connect the charger and make sure that the lightning icon appears on the screen. If there is no indication, check the quality of the soldering or connector landing. Only when you make sure that you are working, you can start the final assembly.
Display repair and plume replacement
Replacing the display in Xiaomi Band 2 is a more complex and risky procedure than replacing the battery, due to the design features of the device. OLED-The screen here is glued directly to the plastic face with a powerful adhesive compound that, when disassembled, often leads to the destruction of the matrix itself.
If you have broken glass or stripes on your screen, it's easier and cheaper to replace the entire framed module if you can find one, otherwise you have to separate the old display, and you have to warm up the front part with a hairdryer and carefully cut the adhesive layer with the thinnest blade or string.
⚠️ Attention: OLED-The screens are extremely sensitive to pressure and bending, and any careless movement of the blade can irrevocably damage the new crystals, and the screen will stop working.
When you install a new display, apply a thin layer of special adhesive B-7000 or E-8000 around the perimeter of the frame. These adhesives remain elastic after drying, which is important for quenching vibrations and micro-strokes. Excess adhesive immediately so that they do not get to the optical sensor or contacts.
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Use rubber harnesses or stationery clips to lock the screen during glue drying, putting a soft cloth to avoid leaving traces on the case.
Once the display is glued, allow the device to lie down for at least 2-3 hours to polymerize the adhesive before being turned on and used. Early activation can cause contact shifts and image artifacts to appear. Image quality is directly dependent on the density of the matrix adjoining the protective glass.
Assembly of the device and checking leakage
The final step is to build the Xiaomi Band 2. Set the board and battery into the case, making sure all the plumes are stacked flat and not clamped with plastic elements. Click the halves of the body around the perimeter, starting from the opposite side of the contacts, moving in a circle until the characteristic click.
To restore moisture protection (at least partial), it is recommended to glue the joint of the body with a thin layer of water-resistant glue or use a special sealing gasket if you can find the original. At home, it is difficult to achieve ideal tightness, so take care of the repaired bracelet than the new one.
Insert the module back into the silicone strap. To facilitate the process, you can slightly lubricate the ends of the module with silicone lubrication or just water (if the strap is clean and dry), but it is better to just gently press it, starting on one side. Make sure that the module sits tightly and does not fall out when shaken.
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Full sealability after factory assembly is restored only on specialized equipment with vacuum press, home methods give only basic protection against splashes.
Put the device on charge and check the functionality: touchpad operation, information display, vibration and synchronization with the smartphone through the Mi Fit application. If all tests are successful, the repair can be considered complete.