Removing the Xiaomi Mi Band 4 capsule from a metal bracelet is a task that seems simple only at first glance. Many users face a problem: the factory fixation is too tight, and the wrong actions lead to scratches on the body or break latches. Especially difficult is the case with metal straps from third-party manufacturers (for example, Milanese or branded under Amazfit), where the mounting mechanism may differ from the original silicone bracelet.
In this article, we will discuss three safe methods of removing the capsule, detail the necessary tools and typical errors, and learn how to avoid damage to the charging contacts and what to do if the latch is jammed. The instructions will also be suitable for similar models - Mi Band 3 or 5, since the principle of attachment is identical to them.
⚠️ Important: If your bracelet is warranty, it is better to contact the service center.A self-dissection can void warranty obligations Xiaomi.
Why is it so hard to remove a capsule from a metal bracelet?
The main problem is the design of metal straps, and unlike silicone analogues, where the capsule is fixed with plastic ears, metal bracelets are often equipped with:
- 🔒 Additional spring latches – they provide a tight fit, but require more effort to disconnect.
- 🔧 Narrow grooves – make it difficult to access the fixers with standard tools (for example, a mediator).
- 🛠️ Non-standard mounting – some manufacturers modify the original Xiaomi mechanism, which complicates the process.
In addition, over time, dirt or oxides accumulate in the grooves (especially if the bracelet has been in contact with sweat or water), which exacerbates the situation. According to service centers, 60% of complaints about “broken” retainers are due to improper removal of the capsule from the metal strap.
If you feel resistance when trying to remove the capsule, don’t make excessive efforts – this can lead to:
- 💥 Breakdown of plastic fixtures inside the body.
- 🔌 Damage to charging contacts (they are located on the back side).
- 🔊 Loss of leakage (relevant for models with protection 5) ATM).
Preparation: What tools will you need?
Before you start removing the capsule, prepare the following tools, without which the process can take 2-3 times longer or end in damage to the device:
| Tool. | What do you need? | The alternative |
|---|---|---|
| Plastic mediator (guitar) | Safely push-ups of fixers without scratches | Credit card, plastic spatula for smartphones |
| Thin-ended tweezers | Removing the capsule from narrow grooves | Manicure scissors (dumb) |
| Silicone sucker (∅ 2-3 cm) | Fixing the capsule during extraction | Double-sided Scotch (non-magnetic) |
| Fen (warm air mode) | Softening of glue or oxides in the grooves | Warm water bottle or warm water (40–50°C) |
| Loupe or magnifying glass | Inspection of fixers for damage | Smartphone flashlight + zoom camera |
⚠️ Warning: Do not use metal screwdrivers or knives, they leave micro-scratch marks on the body, which eventually lead to corrosion. If you do not have a plastic mediator at hand, wrap the metal tool in a 2-3 layer of tape.
We also recommend working on a soft substrate (for example, a towel or rubber mat) to avoid slipping the capsule. If the bracelet has not been removed for a long time, pre-treat the WD-40 slots or alcohol - this will remove the oxides and facilitate the process.
Clean the bracelet slots of dirt |Prepare tools (mediator, tweezers) |Put the bracelet on a soft surface |Check the lighting (preferably daylight) |Photograph the initial position of the fixers-->
Method 1: Classical extraction using a mediator
This method is suitable for most metal bracelets, including original from Xiaomi and third-party (for example, MoKo or V-MORO).
Step 1: Place the bracelet on a flat surface so that the back of the capsule (with charging contacts) faces you, making it easier to access the locks.
Step 2: Put a plastic mediator in the groove between the capsule and the bracelet on either side, deepen it by 2-3 mm until you feel resistance, which is a hold.
Step 3: Carefully press the mediator down and slightly to the side, simulating the "click" movement, and you should hear a slight click, which means that one latch is free.
Step 4: Repeat the action from the opposite side, and if the capsule doesn't come out, sway it slightly from side to side without putting too much effort.
🎥 Video Instructions: This video (mark 1:23) shows the process from a close angle - pay attention to the angle of the mediator's tilt.
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If the lock fails, try to heat the bracelet slightly with a hairdryer (40-50°C) for 10-15 seconds. The heat will expand the metal and facilitate access to the latch.
Method 2: Using a suction cup to fix the capsule
This method is suitable if the locks are too tight or you are afraid of damaging the body. Suction cup will help to evenly distribute the force and avoid distortions.
Step 1: Attach the silicone suction cup to the front of the capsule (where the screen is) and make sure it fits tightly - without gaps.
Step 2: Pull the suction cup upwards and a little on yourself while pressing the locks with the mediator on the back, and the movements should be smooth, without jerking.
Step 3: If the capsule is on one side, don't pull it completely -- first release the second latch, otherwise you can damage the screen plume.
⚠️ Warning: Do not use suction cups with metal hooks - they can scratch the screen.The optimal diameter of the suction cup is 2-3 cm (as on the back of smartphones).
This is particularly effective for deep-groove bracelets where the mediator is missing the locks, and it minimizes the risk of capsule loss.
What to do if the suction cup does not hold?
Method 3: Disassembly of the bracelet with spring latches (for complex cases)
Some metal bracelets (such as mesh straps or rivet models) are equipped with spring-loaded mechanisms that do not respond to standard methods, in which case a partial disassembly will be required.
Step 1: Check the bracelet for screws or hidden latches, often hidden under decorative stubs (such as Amazfit GTR bracelets).
Step 2: If you have screws, unscrew them with a T3 or T4 screwdriver (depending on the model). Without screws, look for slots for snapping, which are usually closer to the edges.
Step 3: With two plastic mediators, press both sides of the bracelet at the same time in the area of the locks. The spring should shrink, releasing the capsule.
🔧 Example: In bracelets Xiaomi Mi Band 4 NFC And with a metal strap from Zeagoo, there's often an extra spring under the left latch.
⚠️ Warning: If you notice that the spring is deformed or broken after disassembly, do not use the bracelet without repair.
| Sign. | Possible problem | Decision |
|---|---|---|
| The capsule comes out from only one side. | One latch jammed. | Check the groove for dirt, clean with alcohol |
| Click is there, but the capsule is not moving. | The spring got caught on the body. | Carefully swing the capsule left-right |
| The locks do not return to their original position. | The spring has weakened or broken. | Replace the bracelet or take it to the service |
Frequent Mistakes and How to Avoid Them
Even with careful extraction, users often make mistakes that lead to breakdowns, and here are the most common ones:
- 🔨 Excessive force can cause cracks in the body or a break in the screen plume. Right: If you don't do it on the third try, change the method.
- 🔥 Overheating of the bracelet - temperature above 60°C can damage the battery or display. Right: heat no longer than 20 seconds with breaks.
- 🧲 Magnets can damage sensors (e.g., an accelerometer) That's right: magnets are only allowed to fix instruments, not to extract them.
- 💧 Immersion in water - despite protection 5 ATM, Long-term contact with water corrodes contacts. WD-40.
Another common problem is the loss of small parts (such as springs or stubs), and to avoid this, work on white fabric or paper where the details are clearly visible.
📌 Tip: If you take off the capsule frequently (for example, to replace a strap), apply graphite lubricant (sold in auto parts stores) to the locks, which will facilitate the process and protect against oxidation.
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Never pull the capsule behind the screen, which is the most vulnerable part. All efforts should be made to the back side where the locks are located.
What to do after removing the capsule?
When the capsule is finally released, don't rush to put it in a new bracelet.
- Check the locks for damage. If they're bent, straighten them gently with tweezers.
- Clear the contacts for charging with a cotton swab dipped in alcohol. This will improve the connection to the charger.
- Check the tightness – if the sealing ring (if any) is damaged, replace it before assembly.
If you are planning to install the capsule in another bracelet, make sure that:
- 🔄 The sizes of the slots are the same (the original Mi Band 4 bracelet is 18 mm wide).
- 🔋 Contacts are not closed - in some straps there are protrusions that block the charging.
- 🛡️ The bracelet material is compatible - for example, leather straps can cause sweating, which leads to corrosion of the fixers.
⚠️ Warning: After you replace the bracelet, sync the device with the Mi Fit app. Sometimes changing the strap will knock the settings of the heart rate sensor.