Did you pull Xiaomi Redmi Airdots headphones out of your case, but one of them stubbornly refuses to turn on, blink or connect to the phone? TWS-And unlike wired headphones, wireless headphones require synchronization between themselves and the sound source, and failure at any stage leads to the "silence" of one of the devices.
In this article, we’ll look at all the possible reasons why a single Redmi Airdots headphone (including the 2, 3, S, and Pro models) may not respond to pressing, charging, or plugging in. You’ll learn how to diagnose a problem yourself, from checking the charge case to resetting, and when to contact a service center.
1. Battery discharge: why one earphone "died" before another
The most obvious reason is the different charge levels in the left and right earbuds, and even if you put both devices in the case for the same time, one of them might have discharged faster because of:
- 🔋 Uneven energy consumption (for example, the right earphone was used as a mono for calls).
- 🔌 Poor contact with charging pins in the case (oxidation, pollution, mechanical displacement).
- 📉 Battery degradation – Lithium polymer batteries lose capacity over time, and a single headphone can “age” faster.
How do you check? Take both of your earbuds out of your case and look at the indicators.
If one earphone flashes red and the other flashes white/blue, the problem is discharge.
If none of them reacts, but the case is charged, it is most likely the contact is to blame.
What to do:
1. Place both headphones in the case for 10-15 minutes (even if the case indicator is green).
2. Try to move the headphones in the case sockets - sometimes a shift of 1-2 mm helps for better contact.
3. If after charging the problem remains, proceed to the next item.
⚠️ Warning: Do not use alcohol or wet wipes to clean your contacts, this can cause corrosion.
2. failure of synchronization between headphones
Redmi Airdots operate on a master-slave principle: one headphone (usually on the right) connects to the phone, and the second one syncs with the first one. If communication between them is broken, one of the headphones can:
- 🔇 Don't turn on at all.
- 🔄 Blinking, but not connecting to the phone.
- 🎧 Work only in mono mode (sound goes only in one headphone).
Causes of synchronization failure:
| Reason. | Signs. | Decision |
|---|---|---|
| Software failure | Headphones previously worked, but after updating / restarting the phone stopped syncing | Resetting headphone settings |
| Mechanical damage to the antenna | The headphone is turned on but does not find the second (flashes red/white) | Diagnostics in the service |
| Different firmware | One earphone is updated, the second is not (for example, after resetting) | Forced Upgrade via Mi Home app |
How to reset synchronization:
1. Get both earphones out of the case.
2.Push and hold the touch buttons on both headphones for 10-15 seconds until the indicators start flashing red and white alternately.
3. Put the headphones back in the case for 30 seconds, then pull out - they should automatically sync.
Make sure the case is loaded.|Get both earphones out.|Press the buttons on 10.+ seconds|Wait for the flashing red/white|Put it back in the case for 30 seconds.-->
3.Problems with charging case: why one earphone doesn't charge
The Redmi Airdots case is not just a case, but a charger-synchronizing device with its own controller and battery, and if one earphone does not charge, it may be the fault of:
- 🔌 Oxidized contacts in the case nest or on the headphone.
- 🔋 Wear of the case battery - over time it loses capacity and can not fully charge both headphones.
- 🛠️ Damage to the charging controller (for example, after a case falls).
How to check the case:
1. Connect the case to the charge and look at the indicator:
If it does not burn - the problem is in the cable, connector or battery case.
If it flashes red, the case charges, but it may not give current to the headphones.
2. Check contacts in the case nests for foreign objects (dust, pile, oxidation).
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If the case is not charged from the original cable, try charging it from the power bank with the output. 5V/1A. Sometimes the problem lies in the power supply, not in the case itself.
What to do:
Clean the contacts with a dry soft brush (do not use metal objects!).
Try charging the headphones in turn - put only the "problem" headphone in the case for 1-2 hours.
- If the case is older than 2 years, it is likely that you need to replace the battery (in the service it is worth it). ~500-800 rubles).
4. Hardware breakdowns: what breaks inside the headphone
If all software methods have been tried and the earphone still doesn't turn on, the cause could be a physical malfunction.
- 🔊 Break speaker - the earphone turns on, flashes, but there is no sound.
- 📡 Bluetooth module damage – the headphone does not connect to either the phone or the second earpiece.
- 🔋 Battery bloating – the headphone is not charged, may not fit in the case.
- 🛠️ Dumping contacts on the board (often after a fall or impact).
How to diagnose a hardware breakdown:
External inspection:
- Cracks on the hull.
- Oxidation marks on the contacts.
Battery bloating (the headphone does not close in the case).
Testing of charging response:
If the headphone does not respond at all to the room in the case, a break in the power chain is possible.
If it flashes but doesn’t connect, the problem is in the Bluetooth module.
⚠️ Warning: If the earphone has fallen into water or been exposed to high humidity, do not try to turn it on! A short circuit can damage the board irrevocably.This requires urgent drying in rice or silica gel (at least 24 hours) before any diagnosis.
Cost of repair in the service:
- Replacement of the speaker: 300-600 rubles.
Replacement of Bluetooth module: 800-1200 rubles.
Battery replacement: 400-700 rubles.
In most cases, repairs are justified if the headphones are older. 1–1.5 For Redmi Airdots models 2/3 cheaper to buy new ones (from 1500 ruble).
5. Software glitches: firmware and phone conflicts
Rarely, it happens that the problem is not the headphones, but the firmware of the phone or conflict with other Bluetooth devices.
- 📱 The headphones are connected, but the sound is only one.
- 🔄 Headphones are constantly switched off and connected again.
- 🚫 Phone “sees” only one headphone in the list of devices.
What to do:
1. Remove the headphones from the list of conjugated devices:
- On Android: Settings → Bluetooth → Redmi Airdots → Forget the device.
- On iOS: Settings → Bluetooth → (i) next to the headphones → Forget this device.
2.Reboot the phone – sometimes helps with Bluetooth stack conflicts.
3. Update the headphone firmware through the Mi Home app (if available for your model).
How to update the firmware Redmi Airdots?
If the problem persists, try connecting the headphones to another phone, and if the second device is working normally, it’s your smartphone’s software that’s to blame (maybe you need to reset the network or update the OS).
Mechanical damage: falls, water, overheating
Redmi Airdots have no official water protection (IP-certificates, so even a small amount of humidity can cause corrosion of contacts:
- 💦 Moisture intake – the earphone stops turning on after rain, sweat or hand washing.
- 🍃 Clogging speaker – the sound is there, but quiet or distorted (often after wearing in a pocket with a pile).
- 🔥 Overheating – if the headphones were lying in the sun or near a heat source, the controller could fail.
First aid for moisture ingestion:
1. Turn off the earphone immediately (if it is still reacting).
2. soak with a dry napkin (do not rub!).
3. Place in a sealed container with silica gel (packages of shoeboxes) for 24-48 hours.
4. Do not turn on until you are sure of complete drying!
If the headphone fell from a height:
Check the integrity of the body (cracks near the buttons or speaker).
- Listen to if there are any extraneous sounds when shaking (the speaker or battery may fall off).
Try to press the case carefully - if the sound appears, the fault is poor contact inside.
7.When to contact the service: signs of malfunction
Not all breakdowns can be repaired by yourself.
| Symptoms. | Probable cause | Cost of repair |
|---|---|---|
| The headphone does not respond to charging, does not blink | Breakage of the power chain, failure of the controller | 600-1200 rubles. |
| The earphone flashes, but does not connect to the phone or the second earpiece. | Damage to Bluetooth module | 800-1500 rubles. |
| The sound is there, but very quiet or distorted. | Damage to the speaker or membrane | 300-700 rubles. |
| The earphone is warming, discharges quickly. | Battery malfunction | 400-800 rubles. |
Where to fix:
Official Xiaomi service centers – warranty repair (if headphones are under 1 year old).
Local workshops are cheaper, but without a guarantee (price is 20-30% lower).
Self-repair – only if you are confident in your skills (youtube has a demolition Redmi Airdots).
⚠️ Warning: If headphones are warranty, do not open them yourself - this will cancel the warranty. Contact the service with a check or confirmation of purchase (even electronically).
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Most Redmi Airdots (except hardware) breakages can be repaired by resetting or cleaning contacts, and if the headphone doesn't respond to charging and resetting, that's a reason to repair.