How to carefully remove the capsule Xiaomi Mi Band 4 from the bracelet: 3 proven ways

The Xiaomi Mi Band 4 fitness bracelet remains one of the most popular gadgets for monitoring activity, despite the release of new models. Its reliability and functionality are often compromised due to one common problem: the need to remove the electronic module (capsule) from the strap. The reasons can vary from replacing the battery to cleaning contacts or installing in another bracelet. However, many users face difficulties: the module gets stuck, plastic latches break, and instructions from the manufacturer are absent.

In this article, we will discuss three safe methods for removing a capsule from the Mi Band 4 strap, detailing the necessary tools and typical errors, and learn how to avoid damage to the contacts and body, which is especially important if you plan to continue using the gadget. All methods are tested in practice and do not require special skills - patience and accuracy are enough.

Why you may need to remove the module from the bracelet

At first glance, the need to disassemble the Mi Band 4 seems questionable, since the gadget is designed for many years of operation without interference, but there are several good reasons why users resort to this procedure:

• 🔋 Battery replacement: Over time, the battery capacity decreases, and the bracelet starts to run out in a few hours, and there is no official replacement service, so many people do it themselves.
• 🧼 Contact cleaning: Sweat, dust and moisture can oxidize metal contacts, which stops the gadget charging or syncing with the smartphone.
• 🔄 Transfer to another strap, for example, when buying a silicone bracelet of a different color or material (skin, metal).
• 🛠️ The impacts can damage the mounting of the module inside the strap, and it has to be removed for diagnosis.

It's important to understand that Xiaomi didn't make it easy to remove the capsule, it's designed for "one-time" use, which means that if you do something sloppy, you can break the plastic locks or damage the sealing rubber pads that protect you from water, so before you start, assess the risks and prepare properly.

Preparation: Tools and precautions

Before you start removing the module, make sure you have everything you need. Lack of the right tools is the main cause of damage. Here's the minimum kit you'll need:

In addition to tools, follow the following rules:

• 🔌 Disconnect the bracelet from charging 2-3 hours before disassembly – this will prevent short circuit when cleaning the contacts.
• 📸 Take a picture of the process at each stage, which will help you to properly assemble the bracelet back.
• 🧤 Work with gloves or clean hands – fat and sweat can damage electronic components.

⚠️ Warning: If your Mi Band 4 is still warranty, the disassembly will void it.

Method 1: Standard latch extraction (for original straps)

This method is suitable for most of the original Xiaomi Mi Band 4 straps, where the module is fixed with plastic latches, the main thing is to act carefully so as not to break the fragile mounts.

Step-by-step:

1. Place the bracelet on a flat surface with the display down.
2. Find on the back of the strap a small recess next to the module - this is the location of the first latch.
3. Insert the plastic spatula into the recess and easily push aside until you hear a click.
4. Repeat the action on the other side of the module - the second latch should be released.
5. Carefully pull the module upwards while holding the strap with the other hand.

If the module is not amenable, don't put too much effort into it. The latches may have become stiff or deformed, in which case you can try softening the plastic with a hair dryer (temperature no higher than 50°C) or gently swinging the module left-right.

⚠️ Warning: Do not use metal screwdrivers or knives – they will scratch the body and can close contacts.

Method 2: Extraction from non-original straps (skin, metal, silicone)

Non-original straps often have a different mounting design, for example, in leather or metal bracelets, the module can be fixed with screws, clips or even glue. There is no universal solution, but there are general recommendations:

• 🔧 Screw them. Look for the little screws under the screwdriver (usually hidden under decorative plugs). Unscrew them and carefully remove the lid.
• 🧲 Magnetic latches. In some straps, the module is held by magnets. Try to tamper with a plastic card on the side.
• 💧 Glue fastener. Warm up the strap with a hair dryer (no higher than 60).°C) and gently pull the module upwards, swaying from side to side.

Metal bracelets (such as Milanese) may need a special key to loosen the clamp, and if you don't have one, try using a thin screwdriver, but be careful - the metal is easy to scratch.

In 80% of cases, the non-original straps break when the module is first removed due to poor-quality materials. If the bracelet is expensive (for example, a premium leather bracelet), it is better to contact the workshop.

Method 3: Emergency removal if the strap is damaged

If the strap is broken, deformed, or the latches are broken, standard methods will not work, and then you have to resort to a "hard" method, but with minimal risk to the module.

Algorithm of action:

1. If it breaks near the module, try cutting it with scissors along the mounting line.
2. If the latches are broken, but the strap is intact, use two plastic blades - insert them from opposite sides and carefully spread them to the sides.
3. For glued modules (often in cheap replicas), heat the strap with a hairdryer for 1-2 minutes, then slap the module with a spatula.

After removal, inspect the module for damage:

• Check the integrity of the sealing ring (perimeter rubber band) if it is torn, the moisture protection is broken.
• Clean the contacts with alcohol - they should not be oxidized or glue.
• Make sure the display doesn’t crack (especially if you’ve been working hard).

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If the module is removed from a damaged strap, check its performance before installing it in a new one. Connect to charging - if the indicator is not burning, the plume may have departed or the board is damaged.

Cleaning and preparing the module for re-installation

Once the module is removed, it must be prepared for further use, and even if you simply transfer it to another strap, it is recommended that you perform minimal maintenance:

1. Contact cleaning: Wet the cotton swab in isopropyl alcohol (70 percent or higher concentration). Gently wipe the gold contacts on the module and in the strap. Let dry for 5-10 minutes (do not use a hair dryer!).
2. O-ring check: If the rubber band is torn or deformed, replace it (you can buy a remake for the Mi Band 4). If there is no replacement, apply a thin layer of silicone lubricant to restore tightness.
3. Performance test: Connect the module to charge, the indicator should light up. Sync with the Mi Fit application to make sure there are no errors.

If you notice that after cleaning the bracelet became worse to hold the charge, perhaps the problem is the oxidation of contacts on the board, not on the connector, in which case you will need to disassemble the module - a task for experienced users or a service center.

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Never use acetone, gasoline or other aggressive solvents to clean your contacts – they destroy the protective coating and can damage the board.

Installation of the module in a new strap: a step-by-step guide

The process of putting the module in the strap is mirrored by the extraction, but it has its nuances. The main rule is not to make an effort. If something doesn't fit in, then you're doing something wrong.

Instructions for the original straps:

1. Make sure the latches on the strap are not deformed.
2. Insert the module into the groove at an angle of ~30° (display up).
3. With a light press, click first one side, then the other.
4. Check the fixation - pull the module up, it should not fall out.

For the original straps:

• 🔩 If the mount is screwed - twist the screws without excessive effort (you can tear the thread).
• 🧲 For magnetic latches, make sure the module sits tightly, without backlash.
• 💧 When using the stainless stain, use B-7000 or similar glue, applying it only to the edges (not on the contacts!).

After installation, check:

1. Moisture protection – lower the bracelet in water for 1-2 seconds (no module!) and make sure that there is no moisture left inside.
2. Charging – connect the bracelet to the USB and wait for the indicator to appear.
3. Synchronization – connect to the Mi Fit app and check the data transfer.

⚠️ Warning: If the bracelet doesn't turn on after installation, don't panic. Maybe the contacts didn't match. Remove the module and repeat the procedure, making sure it sat straight.

Frequent Mistakes and How to Avoid Them

Even with care, users often make mistakes that lead to the bracelet breaking. TOP-5 The most common mistakes and ways to prevent them:

Another common problem is that the bracelet doesn't turn on after disassembly, and the reasons can be different.

• 🔋 Battery discharged (plug in charge for 30 minutes).
• 🔌 Display trail has gone (requires disassembly of the module).
• 💧 Short circuit due to moisture (refrigerate 24 hours in rice).

If you are not sure about the cause of the malfunction, it is better to contact the service. Self-repair of the board without experience is fraught with final breakdown.

FAQ: Answers to Frequent Questions