How to disassemble the case from headphones Xiaomi Mi True Wireless Earphones 2 Basic: instructions with photos and tips

The Xiaomi Mi True Wireless Earphones 2 Basic charger is a compact but fragile device that can fail over time: stop charging headphones, don't turn on or physically damage. Case disassembly is often required to clean contacts, replace batteries or repair chips, but doing so without instructions is risky. Unlike headphones, where the body is sealed, the case is disassembled relatively easily - if you know the mount points and use the right tools.

Many users are afraid of damaging plastic latches or tearing plumes, but with careful approach, the risks are minimal. This article is a step-by-step analysis of the photo, a list of tools you need, and typical mistakes to avoid. If you've never done electronics, start by preparing: read the article to the end to see what you're going to encounter.

⚠️ Warning: Disassembling the Xiaomi Mi True Wireless Earphones 2 Basic case will void the warranty (if it is still valid). If the device is warranty, contact the service center. Self-repair is only justified if the warranty period expires or there are no official services in your area.

Preparation for the review: tools and security measures

Before you start, make sure you have everything you need, don't use any tools at your disposal (knives, screwdrivers, not in size) - it's almost guaranteed to damage the body or internal components.

• 🔧 Plastic mediator (or a special spatula for disassembling phones) - to tamper with the case without scratches.
• 🔩 Cross screwdriver PH00 (small, for micropropets).
• 🧲 Magnetic mat or container – so as not to lose screws and small details.
• 🔍 Loop or magnifying glass - for inspection of contacts and soldering (optional).
• 🧴 Isopropyl alcohol (90%+) — Cleaning contacts and fees.

Also, prepare a well-lit workplace and take pictures of each step of the disassembly, which will help to properly assemble the case back, if you plan to solder contacts or replace the battery, you will need additional:

• 🔥 A soldering iron with a thin sting (power up to 30 watts).
• 🧵 solder and flux (e.g. Tinol or RMA-223).
• 🔋 New battery (if replacement is required) - suitable in terms of 3.7V, 300mAh.

⚠️ Warning: Don't disassemble the case if it's wet or wet. Let it dry completely within 24 to 48 hours, otherwise you risk closing the board. Also avoid static electricity - touch the metal object before working with the internal components.

Step 1: Removing the upper cover of the case

The case case case Xiaomi Mi True Wireless Earphones 2 Basic consists of two parts, fastened by plastic latches and two screws under rubber legs.

1. Turn the case over and find two round rubber pads at the bottom (near the USB-port).
2. Carefully tuck them in with a plastic pickup or tweezers. There are screws underneath.
3. Unscrew both screws with a PH00 cross screwdriver and put them in the container.

Now you can start to detach the body. Put the mediator in the gap between the top and bottom of the case (better start from the side opposite the USB-port). Carefully drive the tool along the perimeter, alternately snapping the locks. All of them 6-8 pieces, they are evenly arranged.

💡 Tip: If the lid doesn't respond, don't force. You probably missed one of the screws or the latch. Check all the mounts again.

Remove rubber legs | Unscrew 2 screws PH00|Put the mediator on the opposite side of the USB |Click all 6-8 locks-->

Step 2: Removing the board and battery

After removing the top cover, you will see:

• 🔋 Battery (stick to the body).
• 📱 Printed circuit board with USB- port, indicator and headphone contacts.
• 🔌 Button plume (if your case is equipped with a physical power button).

First, disconnect the battery. It's connected to the board via a two-pin connector (white or black), gently put the connector in a plastic spatula and unplug it. Don't pull the wires, it can rip the contacts off the board!

Next:

1. Unscrew 4 screws that attach the board to the body (they can be under rubber pads).
2. Carefully raise the fee. If it does not go away, check if you have forgotten to disconnect the button plume (if any).
3. Remove the board and put it on an antistatic surface.

⚠️ Warning: There are small SMD- components (resistors, capacitors) on the board. Don't touch them with your fingers or put the board on metal surfaces, which can cause a short circuit.

Step 3: Diagnostics and cleaning contacts

Now that the case is disassembled, we can start diagnosing the malfunctions.

To clean the contacts:

1. Wet the cotton swab in isopropyl alcohol.
2. Gently wipe the spring contacts (for headphones) and USB- connector.
3. Let it dry for 5-10 minutes.

If the problem is the cliff of the circuit board, you'll need ration.

• 🔍 Examine the board under the magnifying glass for microcracks.
• 🔥 Salt the damaged contacts with a thin solder.
• 🧴 Apply protective varnish (e.g., Urushiol) to renovated areas.

Step 4: Replace the battery (if necessary)

The battery in Xiaomi Mi True Wireless Earphones 2 Basic is a weak spot. After 1.5-2 years of operation, it loses up to 50% of its capacity, and the case begins to run out in a few hours. Replacing the battery is one of the most common reasons for disassembling the case.

To replace:

1. Carefully unstick the old battery. It's glued to double-sided tape, but sometimes the manufacturer uses glue, in which case warm the battery with a hair dryer (temperature no higher than 60°C) to soften the glue.
2. Clean the installation site of glue residues with a plastic scraper.
3. Connect the new battery to the board, observing the polarity (+ and - should match!).
4. Stick the battery to a new double-sided tape or a drop of hot glue (do not overdo it so as not to damage the case the next time you disassemble).

⚠️ Warning: Do not use superglue or other aggressive adhesives — they can damage the plastic or penetrate the case. Also, do not overheat the battery when soldering — it is dangerous!

After replacing the battery, it is recommended to calibrate it:

• Completely discharge the case (before the indicator is turned off).
• Charge to 100% without interruption.
• Repeat the cycle 2-3 times.

5 step: Check the USB- port and charging controller

If the case is not charged from USB, the problem may lie in:

• 🔌 Physical damage to a port (e.g., bent contacts).
• 🔋 Failure of the charging controller (chip on the board).
• 🔌 Breaking of the tracks between port and board.

For diagnosis:

1. Connect the case to the charger and check if the USB-port is warming up. If so, it's probably a short circuit problem.
2. Use a multimeter in vertebrae mode to check the integrity of the tracks from port to board.
3. Check the charging controller (usually labeled as BQ25600 or similar) if it has darkening or cracks, it will have to be replaced.

If the port is damaged, it can be replaced.

• Drink the old port with a soldering iron, pre-applying the flux.
• Install a new port by combining contacts with the tracks on the board.
• Soak up all the conclusions, avoiding overheating.

💡 Tip: If you're not sure about your soldering skills, you better contact the service. Damage to the tracks on the board can make the case completely inoperable.

💡

Before soldering USB-port be sure to fix the board (for example, in the clutches with soft sponges) to avoid shifting contacts. Also use solder with a low melting point (for example, Sn63Pb37).

Step 6: Case Assembly and Testing

After the repair is completed, collect the case in reverse order:

1. Put the charge in place and spin 4 screws.
2. Connect the battery (don’t forget the polarity!)
3. Connect the upper and lower parts of the body, starting from the USB-port side.
4. Twisting two screws under the rubber legs and set the legs in place.

Before final assembly, check the performance:

• 🔋 Connect the case to the charger - the indicator should light up.
• 🎧 Place the headphones in the case - they should start charging (the indicators on the headphones will light up red).
• 🔄 Press the reset button (if any) - the case should reboot.

If something doesn’t work, take the case apart again and check:

• ✅ Correct connection of all plumes and connectors.
• ✅ Contact integrity (possibly bent when assembled).
• ✅ The polarity of the battery.

⚠️ Warning: If the case doesn't turn on or warms up after assembly, immediately disconnect it from charging. This may indicate a short circuit. Disassemble the case and repeat the diagnosis.

Frequent Mistakes and How to Avoid Them

Even experienced craftsmen sometimes make mistakes when parsing Xiaomi Mi True Wireless Earphones 2 Basic.

• 🔧 Too much pressure on the → mediator cracks in the body. Solution: Use a rounded-end mediator and prick it carefully, without jerking.
• 🔥 Overheating boards for soldering → detachment of tracks. Solution: Use a soldering iron with a power of no more than 30 watts and work with short touches.
• 🔋 Battery Polarity Wrong → Charging Controller Failure Solution: Always check the + and - marking before you plug in.
• 🧲 Loss of screws or spring contacts → unstable casework. Solution: Use a magnetic mat and sort parts by container.

Another common problem is that the rubber legs are damaged when removed, and if they break, they can be replaced with similar ones (such as from other Xiaomi devices) or used with silicone sealant to fix the screws.

💡 Tip: If you're doing a case for the first time, practice on unnecessary electronics (like old charging) to help you fill your arm and avoid mistakes.

FAQ: Answers to Frequent Questions