Why to Disassemble Redmi Airdots and What to Know Before You Start
Xiaomi Redmi Airdots wireless headphones are some of the most popular budget headphones TWS-The most common problem is that there's no sound in one headphone, bad charge, or mechanical damage to the body, and disassembly may be necessary to clean the contacts, replace the battery, or repair the speaker. However, before you take up the screwdriver, it is important to understand: the design of Redmi Airdots is not designed for self-repair.
There are no standard screws inside the headphones, the body is glued together, and the board is fixed with adhesive composition. This means that if you disassemble the tubes, the speaker or the microphone, you risk damaging the plumes, making the earphone completely inoperable. In addition, after opening the case, the leakage is broken, which can lead to moisture or dust. If your goal is to replace the battery, note: the original Xiaomi batteries are not sold separately, and you will have to choose analogues with the appropriate parameters.
Before you start, evaluate your skills. If you've never learned microelectronics, you might want to go to a service center. The cost of repairs in Xiaomi's official centers starts at 800 rubles per headphone (2026), which is sometimes cheaper than buying a new pair. But if you decide to act on your own, this guide will help minimize the risks.
What tools will be needed to disassemble
You need a special tool to cleanly disassemble Redmi Airdots, and a regular screwdriver or knife won't work here, because the risk of damage to the plastic case is too high.
- 🔧 Plastic mediator or opener for smartphones (thin and flexible so as not to scratch the case).
- 🔥 Hair dryer or thermo-air station (for softening glue, temperature 60-80)°C).
- 🧲 Magnetic screwdriver. T3 or T4 (to unscrew hidden screws, if they are in your version).
- 📏 Tweezers with thin ends (to extract plumes and small details).
- 🧴 Isopropyl alcohol (90%+) (Cleaning contacts and removing glue residues).
- 📦 Container for small parts (so as not to lose springs or seals).
If you don’t have a thermophen, you can use a regular hair dryer, but be careful: overheating over 100.°C can warp plastic. The alternative is to put the headphone in hot water (not boiling water!) for 1-2 minutes, but it's risky for electronics. USB-Microscope to examine small details, especially if you plan to solder contacts.
⚠️ Warning: Do not use metal blades or knives - they leave scratches on the case and can close contacts on the board.
Step-by-step: how to disassemble the body of Redmi Airdots
The disassembly process starts with the upper body being separated from the lower body. In Redmi Airdots (TWSEJ04LS, TWSEJ04LM and similar models), the body consists of two halves glued around the perimeter.
- Heat the body. Turn on the hair dryer at minimum power and evenly warm the earphone for 30-40 seconds, holding it at a distance of 5-7 cm. The glue will become softer, and the risk of damage will decrease.
- Separate the halves. Put a plastic mediator in the gap between the top and bottom of the body (better start from the side of the button). Carefully swipe the mediator around the perimeter, gradually increasing the gap. Do not force - if the body does not respond, warm up again.
- Removal of the board. Once you split the case, you'll see a board glued to the bottom, it's connected to the speaker and microphone with thin wires. Don't pull for a fee, first disconnect the plumes with tweezers!
In some versions of Redmi Airdots, a screw may be hiding under the rubber button seal. If the body doesn't separate after heating, check this place. The screw is usually very tight, so don't try to unscrew it without a magnetic screwdriver.
Turn off the headphone from the charging case
Warm up the body with a hair dryer (60–80°C)
Prepare a container for small parts
Wear an antistatic bracelet (optional)
Take a picture of the details before disassembly-->
If you're disassembling a battery replacement headphone, look at the battery mount. In Redmi Airdots, the battery is soldered to the board, and it will require a soldering iron with a thin stinger (30 watts at most) and solder. Don't try to tear the battery away by force, it will damage the tracks on the board.
What to do if the headphone does not understand: common mistakes
Even with careful action, the disassembly may not go according to plan.
| Problem. | Possible cause | Decision |
|---|---|---|
| The body does not split despite the heat | Too strong adhesive or hidden screw | Check the area under the button for a screw. Reheat longer (up to 1 minute). |
| The fee has come off the plumes. | Sharp movement when the body is divided | Carefully solder the plumes back. If the tracks are damaged, use the donor wire. |
| The speaker remained at the top of the body | The glue between the speaker and the body has not softened. | Warm up the speaker separately with a hair dryer and slap it with a mediator on the edge. |
| After assembly, the headphone does not turn on. | Battery or charging contacts damaged | Check the multimeter voltage on the battery (should be ~3.7V). Clean the contacts with alcohol. |
If you accidentally tore a microphone plume or speaker, don't panic. Most of the time, you can restore it with thin wires and a soldering iron. The key is not to overheat the board so that the tracks don't peel off. Use flux and the minimum temperature of the soldering iron.
⚠️ Note: If the earphone starts to squeak or interfere after disassembly, the speaker or microphone is likely to be damaged, in which case repairs will cost more than buying new Airdots, since original parts are not sold.
What to do if the charging connector is broken?
How to replace the battery in Redmi Airdots: battery and soldering choice
Battery is the most common reason for disassembling Redmi Airdots. Over time, the battery capacity drops, and the headphones discharge in 10-15 minutes. The original battery is marked 3.7V 40mAh (in some versions - 55mAh) and dimensions of approximately 15×10×3 mm. To replace the analogues from ATL or Desay, but it is important to observe the polarity!
Replacement process:
- Solder off the old battery, starting with a sub-contact (usually marked with a black wire) and use a solder suction to keep the board from overheating.
- Clean the contacts with alcohol and apply a new solder.
- Sell the new battery polarity-wise, and the plus contact is usually red or marked with a + sign on the board.
- Secure the battery with a drop of glue (such as a B-7000) so it doesn’t hang around inside the case.
After replacing the battery, be sure to check the voltage with a multimeter. It should be within 3.6-4.2V. If the voltage is below 3.3V, the battery is discharged and needs to be charged before the first assembly. Also note that new batteries require 2-3 charging/discharge cycles to reach maximum capacity.
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If you are not sure about your soldering skills, practice on unnecessary board. It is critical for Redmi Airdots not to overheat the contacts - 1-2 seconds of exposure to a soldering iron is enough.
Build the headphone after repair: how to avoid mistakes
Putting Redmi Airdots together after disassembly is as responsible as disassembling, and the main goal is to ensure that the board and speaker are in good contact, and that the body is tight, and here are the key points:
- 🔌 Check the plumes. Make sure all the connecting wires (speaker, microphone, button) fit tightly into the contacts on the board.
- 🧩 Line the body. The halves should match without gaps. If the body deformed when heated, warm it up carefully again and align.
- 🎨 Apply the glue. Use a thin layer of glue. B-7000 Or something like that, but don't overdo it, because the glue can get in.
- 🔄 Hold the body. After gluing, press the earphone in the vise (without strong pressure) for 10-15 minutes or use bands to fix it.
Don't turn on the earphone immediately after assembly. Let the glue dry for 1-2 hours. Then check the operability: plug in to the phone, test the sound in both channels, check the microphone and button. If the earphone doesn't turn on, disassemble it again and check the battery and board contacts.
If the headphone gets worse after the repair, there may be a problem with the power controller on the board, and if you change the board completely, it's not economically feasible. Also, look at the rubber seal rings, if they break, the moisture protection will break, and the earphone can fail if moisture hits.
Frequent breakdowns of Redmi Airdots and whether they can be fixed independently
In addition to battery problems, Redmi Airdots also has other typical malfunctions, including which can be repaired at home and which require professional repair:
| Breakdown | Reason. | Possibility of repair |
|---|---|---|
| One earpiece doesn't work. | The speaker or microphone has been disconnected. | Yeah, if there's a charge and a speaker. |
| The headphone doesn't charge in the case. | Oxidation of contacts or battery damage | Yes (cleaning contacts or replacing battery) |
| Extraneous noise or crackling | Damage to the speaker membrane or dust ingress | Partially (cleaning, but changing the speaker is difficult) |
| The earphone is off. | Short circuit on the board or battery discharge to zero | Sometimes (multimeter diagnosis required) |
| Poor communication quality (sound breaks) | Problems with an antenna or Bluetooth module | No (fee replacement required) |
If your Redmi Airdots stops connecting to your phone or permanently shuts down, the problem may be in the firmware. In rare cases, resetting helps: you need to hold the button on the earphone for 15 seconds before the red and white light flashes. However, if a hardware problem (for example, a Bluetooth chip has failed), such repair is impossible without changing the board.
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Most of the Redmi Airdots breakdowns are due to mechanical damage or battery wear, and if the headphone doesn't turn on after a fall, the board is likely damaged and repairs will cost more than buying new ones.