Did you put Xiaomi AirDots or Redmi Buds in a case, plugged in to charge, but the indicator doesn't burn, and the battery level doesn't change? Or does the case itself discharge without transferring power to the headphones? The charging problem is one of the most common among owners of Xiaomi wireless headphones, and the reasons can lie in both banal contamination of contacts and serious hardware malfunctions.
In this article, we will not just list the possible causes, but analyze them from a technical point of view: How to check each element of the charging chain (from cable to power controller), what user errors lead to breakdowns, and what to do if the headphones completely stopped responding to the connection to the network. 3T — their eating patterns have nuances that are rarely written in standard instructions.
We warn you right away, if you've checked all the items in the article, you've got a problem, probably the case charger or the headphone battery, and you'll need professional repairs, but in 80 percent of cases, you can fix the problem yourself, and you can use the algorithm to do it.
1. Checking the power source and cable: why the case is not charging
The first thing to rule out is problems with the power supply or cable, and even if you're using the original Xiaomi cable, it could have failed due to overburdens or internal cliffs.
- 🔌 Connect the case to another charger (preferably with Quick Charge support) 3.0 or USB-PD). Many Xiaomi models are sensitive to voltage – if the block is less 5V/1A, charging may not start.
- 🔄 Try another cable, preferably one with a ferrite ring (it reduces interference), and cheap cables without shielding often cause unstable charging.
- 💡 Look at the case indicator: if it flashes red or does not burn at all, the problem may be in the USB-Type-C contacts (especially relevant for the Redmi Buds 3 Pro, where the connector often loosens).
If the case starts charging with another cable or unit, the problem is solved. But if not, move on to the next step. Note: some models (such as Xiaomi AirDots 3) do not charge from USB 3.0 ports on the PC due to the nature of the data protocol.
2.Contamination of contacts: how to clean and how it is dangerous
Contacts on Xiaomi case and headphones become covered with oxide, dust or fat over time, resulting in poor contact and, as a result, no charging.
What you need:
- 🧴 Cotton swabs dipped in isopropyl alcohol (at least 70%) Vodka or cologne won't work, they leave a film behind.
- 🧲 Soft toothbrush (to clean hard-to-reach places in the case).
- 🔍 Lupa (optional to check the integrity of the contacts after cleaning).
Cleaning algorithm:
- Turn the case off the power and remove the headphones.
- Gently wipe the contacts on the case and headphones with a cotton swab dipped in alcohol.
- To remove dried dirt, use a toothbrush (movements along the contacts, not across).
- Allow the parts to dry for 10-15 minutes before connecting.
Make sure the case is offline |
Use only isopropyl alcohol |
Do not use metal objects (needles, knives) |
Check contacts on headphones and in the case |
Let the parts dry completely-->
⚠️ Warning: Never use abrasive materials ( sandpaper, eraser) or aggressive liquids (acetone, white spirit) to clean the contacts, and make the problem worse.
3.Resetting headphone settings: when it helps
If Xiaomi headphones connect to the phone but don't charge in the case, the problem may be a firmware failure or Bluetooth module conflict, in which case a full reset helps.
| Model headphones | Resetting method | Notes |
|---|---|---|
| Xiaomi AirDots (1-3 generation) | Press and hold the button on the case for 15-20 seconds until the indicator flashes red and white. | After resetting, the headphones will automatically disconnect from all devices. |
| Redmi Buds 3/4 Pro | Three times quickly tap the touchpad on each headphone, then put them in the case. | Confirmation is required in the Mi Home mobile app. |
| Xiaomi Buds 3/3T | Hold the touchpad on both headphones for 10 seconds until you hear the beep. | After reset, gestures may need to be re-tuned. |
If the reset didn’t help, try updating your firmware through the official Mi Home or Xiaomi Earbuds app.
- Connect the headphones to your smartphone.
- Open the application and go to the Device Settings → Software Update.
- If a new version is available, install it (don’t turn off the headphones during the process!).
💡
After resetting the headphones Xiaomi AirDots Pro 2 may disappear sound in one of the headphones. To restore the stereo, put both headphones in the case and wait 30 seconds — they sync automatically.
4.Battery problems: how to diagnose wear
The lithium polymer batteries in Xiaomi headphones are designed for 300-500 charging cycles. After that, the capacity starts to fall, and the charging time increases. If your headphones are older than 2-3 years, the problem may be precisely the wear of the battery.
Signs of a "dying" battery:
- 🔋 Case charges, but headphones do not (or charging is extremely slow).
- ⚡ The indicator on the case shows 100%, but the headphones discharge in 10-15 minutes.
- 🔥 Case or headphones are heated during charging (over 40).°C).
Check the status of the battery can be done by:
- Mobile apps (like AccuBattery for Android) Connect your headphones and check the discharge schedule.
- Multimeter (for advanced users) Measure the voltage on the battery contacts in the case - it should be in the range of 3.7-4.2V.
- Visual inspection, if the battery in the case is swelling, it needs to be replaced immediately!
⚠️ Attention: If the battery in the case or headphones is swelling, you can't keep using the device! This can cause fire. In this case, the only solution is to replace the battery in the service center.
How to check the battery multimeter?
5. Charging controller failures: how to "wake up" the case
The charging controller in the Xiaomi case sometimes freezes due to voltage surges or a deep battery discharge, in which case the case does not respond to the connection to the network, and the indicator does not burn, the solution is a forced reset of the controller.
Instructions:
- Disconnect the case from charging.
- Press and hold the button on the case (if any) for 30 to 40 seconds.
- Without releasing the button, connect the case to the charger.
- Wait 10-15 seconds – the indicator should light up.
If there is no button on the case (as in Xiaomi Buds 3), try the following method:
- Put the headphones in the case.
- Connect the case to the charge and leave for 1-2 hours (even if the indicator does not burn).
- Check the charge level after a while – sometimes the controller “wakes up” after a long connection.
⚠️ WARNING: If after these manipulations the case still doesn't charge, don't try to disassemble it yourself! in Xiaomi AirDots Pro models and the newer charging controller is integrated into the main board, and its replacement requires soldering using a soldering station.
6 Mechanical damage: what breaks most often
Xiaomi headphones often fail due to physical damage that is not always noticeable at first glance.
- 🔌 The contact springs in the case break, and if you're shaking the case, you hear a knock, you probably have a spring that's holding the headphone contacts off, and this is a common problem with Redmi Buds 2 and AirDots Youth.
- 💥 Even if the case is intact, micro-cracks on the board tracks can interrupt the charging circuit.
- 🔋 Oxidation of the USB-Type-C connector. If the case is determined when connecting the cable, then after a time, the problem is in the oxidized contacts of the connector.
- 🎧 If one earphone is charging and the other is not, check the integrity of the flexible plume connecting the battery to the board.
Diagnosis of mechanical damage:
- Examine the case for cracks or dents.
- Shake the case - there should be no extraneous sounds (knocking, rattling details).
- Try to press the USB-Type-C connector slightly when you connect the cable, and if the case starts charging, the problem is poor connector contact.
If you find mechanical damage, home repairs are only possible if you have experience with small electronics.
- Replacement of contact springs (the cost of parts is from 100 rubles).
- Salting of plumes or payment paths (saw dryer is required).
- Replacement of the USB-Type-C connector (the service will cost 500-800 rubles).
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If the Xiaomi case stopped charging after a fall or impact, do not try to disassemble it without experience. In 90% of cases, self-repair leads to damage to the board and the cost of professional repairs.
7. Software glitches: When firmware is to blame
Rarely, but it happens that Xiaomi headphones do not charge due to a malfunction in the firmware.
- 📱 Updates to the software through the Mi Home app.
- 🔄 Incorrect resetting of settings.
- 🤖 Connect to a device with a non-standard version of Bluetooth (for example, to a PC with a Bluetooth 5.2 adapter, but outdated drivers).
How to fix it:
- Firmware rollback (if the update failed)
- Reset to factory settings via the app: Open Mi Home → select headphones. Go to Settings → Reset. Confirm action and wait for the reboot.
- Reconnect to another device. Sometimes the headphones freeze when you pair them with a particular smartphone, and try connecting them to another phone or tablet.
If you have a problem after this, check the Bluetooth logs on your phone (in the engineering menu).
- Type the code ##4636## on your phone keyboard.
- Select Bluetooth and look at the Status bar. If there's a Connection failed or Authentication rejected error, the problem is in the Bluetooth headphone module.