How to disassemble the case from Xiaomi headphones: step-by-step analysis

Xiaomi wireless headphone users often face situations where a familiar device stops functioning properly. Most often, the problem lies not in the inserts themselves, but in their charging case, which eventually ceases to hold charge or recognize gadgets. Owners immediately think about how to disassemble a case from Xiaomi headphones to clean contacts or replace a failed battery. This is a logical solution, given the high cost of original accessories and the complexity of finding them separately from the headset.

However, the dismantling process requires some preparation and care, as the company's engineers often use hidden screws and adhesives to ensure moisture protection and aesthetics. Careless movement can damage plastic latches or rupture the plume connecting the motherboard to the charging port. In this article, we will take a detailed look at the design of popular models such as the Redmi AirDots and Mi True Wireless Earbuds, and explain how to minimize the risks when opening the case.

Before you start working, you need to understand that self-intervention almost always deprives the device of warranty service. If your headphones are under warranty, it is better to contact an authorized service center. But if the warranty period has expired, and you have skills with small electronics, then restoring the case with your own hands will save a significant amount of money and prolong the life of your favorite gadget.

Tools and workplace preparation required

The proper disassembly of any electronics starts with the right workspace. You need a well-lit desk, preferably with a white surface, so as not to lose small screws that can bounce to the side. The main tool will be a set of precision screwdrivers, including cross bits of size PH000 and PH00, as well as a flat screwdriver for tweaking latches. Without a quality tool, the risk of licking the screw heads is high, which will make further assembly impossible.

Plastic spatulas or old plastic cards are ideal for separating plastic halves of the case. Using metal tools such as knives or needles is highly undesirable, as they easily leave deep scratches on glossy plastic and can damage the internal components when slipping, and you will need tweezers with curved ends to work with small plumes and connectors inside the device.

• 🛠️ A set of precision screwdrivers (cross and flat)
• 📱 Plastic blades for opening the body
• 🧲 Magnetic mat or screw container
• 🔦 Powerful light source or magnifying glass
• 🧤 Antistatic gloves (recommended)

Special attention should be paid to safety. Before work begins, it is recommended to discharge the lithium polymer battery if it is still showing signs of life, although in the case of a broken case this is difficult to do. There is always a risk of short circuit when working with batteries, so keep a sand container or a fire resistant mat on hand in case of fire.

⚠️ Warning: Never use metal tools to separate the body until you make sure there are no strained plumes inside.Abrupt movement can cause the LED control plume or charging port to break.

Design features of charging cases Xiaomi

Xiaomi engineers apply different circuitry solutions depending on the price segment of the model. Budget versions such as Redmi AirDots 1 and 2 are often assembled on latches without visible screws, which creates the illusion of monolithic design. More expensive models such as Mi True Wireless Earphones 2 Pro can have hidden fasteners under silicone plugs or decorative elements. Understanding the type of connection is critical to choosing an opening strategy.

Inside the case, there are usually two main boards: the main motherboard with a charge controller and a Bluetooth module, and a board with a Type-C or Micro-USB connector. They are connected by a thin plume that is extremely sensitive to crunch. The battery is usually soldered to the board with wires and fixed with double-sided tape, which requires caution when extracting.

The system of magnets that hold the headphones in the case is also challenging, and they're glued into plastic seats and can fall out if you don't handle them carefully, and it's important to keep the polarity in mind when you build them, because they're going to be pushed out of the sockets instead of being magnetized to the contacts.

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Take a photo of the internal device before any plumes are disconnected, which will help you remember exactly how the tracks were laid and where the connectors connected when they were reassembled.

Step-by-step: dismantling the body

The disassembly process begins with a thorough external inspection. Swipe your fingers around the junction of the halves of the body, trying to find the grooves or places where the screws can be hidden under the stickers. If there are no screws, then the body is held on tight plastic latches. Put the plastic blade in the joint near the lid loop or the opposite side and start gently moving around the perimeter, listening to the characteristic clicks of the snapping locks.

Move slowly without putting too much effort. If the case doesn't lend itself, you may have missed the screw. Xiaomi models often have a screw under the logo on the lid or under the rubber insert at the bottom. Once all the latches are free, gently lift the top cover. Don't pull it up sharply, as there may be a plume inside that connects the charge indicator to the main board.

The next step is to disconnect the battery. This is the most important thing, because the battery is often energized. Find the battery connector on the board. It can be soldered or connected through the connector. If it's a connector, gently tuck it in with a plastic blade from the bottom up. If the battery is soldered, you'll need a soldering iron and flux, but you'd better first try to find a way to turn off the power programmatically or through a circuit break if the design allows.

• 🔍 Check the perimeter for hidden screws
• 🔓 Put the body in the area of the loop or seam
• 👂 Listen to the clicks and move around in a circle.
• 🔌 Turn off the battery first.

Once the power is out, you can take the lid off completely and access the insides, you can now access the main board and the charging port, visually check the charge for oxides, capacitor blobs, or disconnected contacts, and often the problem with a broken case is the departed charging port contact.

⚠️ Attention: Xiaomi case plastic is quite fragile. If you press too much with a blade, the walls can crack. Move the tool smoothly using the principle of lever with minimal force.

Diagnostics and battery replacement

The most common cause of wireless headphone failure is battery degradation. If the case stops holding the charge or charges in 5 minutes and 10 minutes, then it's time to change the battery. To replace it, you need to carefully remove the old element. It's usually fixed on double-sided tape. Don't pull the battery by the wires, as they can break away from the battery itself, which will lead to a short circuit.

Use a plastic card or a spatula to tweak the battery and separate it from the case. If necessary, you can slightly warm the back of the case with a hairdryer (without overheating!) to soften the glue. The new battery should have exactly the same dimensions and voltage, usually 3.7V or 3.85V. The capacity can be taken slightly above the original, if size allows, but most importantly - the match of the connector and polarity.

When you connect a new battery, make sure that the wires are not clamped by the body. The wires should be in specially designated grooves. After installing a new battery, take your time to close the case. First, check if the charge is going on and the indicator is lighting up. If everything works, you can fix the battery with a new layer of glue or tape.

It's important to note that finding the original battery can be difficult, and in these cases, you can use universal lithium polymer batteries, cutting the connector and re-drinking it on your own, but this requires soldering skills. If you're not sure about yourself, you'd better order a ready-made battery module for your headphone model on profile areas.

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Replacing the battery is the most effective way to reanimate an old case if the problem is in autonomy, not in the control board.

Cleaning contacts and maintenance of charges

Even if the battery is in good shape, the case may not charge the headphones because of the oxidation of the contacts. In the process of operating on the gold patches inside the case and on the headphones themselves, skin fat, dust and oxides accumulate, this creates high resistance, and the current simply does not pass to the headphone battery. To clean, use a cotton swab dipped in isopropyl alcohol.

Carefully wipe the contact areas inside the headphone recesses. Do not use water or aggressive solvents that can damage the plastic or flush the factory lubricant from the lid mechanism. After cleaning with alcohol, allow the contacts to dry completely for 5-10 minutes before installing the headphones.

It's also worth checking the board for dust. Compressed air will blow out the dirt from hard-to-reach areas. If you notice swollen capacitors or burn marks on the board, repairs may not be feasible, as you need to replace electronic components, which is difficult and expensive.

• 🧹 Use isopropyl alcohol for cleaning
• 🚫 Avoid getting moisture on the board
• 👀 Check the bill for bloating
• 💨 Blow the insides with compressed air

After all the cleaning and replacement procedures, check the operability, insert the headphones into the case and connect it to the charger, the indicator should light up, signaling the start of the charging process. If the indicator flashes red or does not light up at all, check that the plumes and battery are connected correctly.

Assembly and final testing

The assembly is done in reverse order, but requires even more care. First, connect the battery and make sure the device responds to the charging connection. Then carefully stack all the wires and plumes into your channels so that they are not clamped by the halves of the case. A clamped plume is a guarantee that it will break after a week of use.

Put the halves of the body together and start snapping them around the perimeter. Move from the center to the edges or from the loop to the opposite side. You should hear clear clicks. If any part of the body protrudes, don't push, there's something inside (wire, plume or screw). Take it apart again and eliminate the cause.

The final step is to twist the screws. Don't pull them over, because the plastic can crack with the stress. Swirl the screws cross-cross for even distribution of pressure. After assembly, wipe the case with a soft cloth to remove fingerprints and traces of glue.

⚠️ Warning: If the case cover does not close tightly or dangles after assembly, you either have not fully snapped the case or lost/damaged the internal plastic guides. In the latter case, careful use of glue will help, but this will make redisassembly impossible.

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To glue the case, if the latches are broken, use a special glue B-7000.It remains elastic after drying and allows you to reopen the device if necessary, unlike superglue.

Now your case is back to work, and if you repair it properly, it can last for a few more years, and the key is patience and not rushing, and Xiaomi's electronics are pretty reliable, and most often it just requires replacing consumables or cleaning.

Frequently Asked Questions (FAQ)