When Xiaomi’s beloved Redmi AirDots suddenly stop gaining charge, the owner is often taken by surprise: The indicators may not light up, or the case shows full charging, but the headphones inside are discharged after 5 minutes of work. TWS-models that do not always indicate a fatal breakdown.
Most of the time, the lack of charging is caused by contact oxidation or a software failure of the power controller. Before you bring the device to the service, you should rule out trivial causes such as contamination of patches or rupture of the chain inside the case. Understanding the principle of operation of lithium polymer batteries will help avoid errors in recovery.
We'll look at the major fault scenarios, from simple mechanical problems to deep cell discharge, accurate diagnostics will save money and time by bringing the gadget back to life on its own, sometimes just cleaning the contacts to make the device work again as new.
Mechanical causes and contamination of contacts
The most common reason Redmi AirDots or Mi True Wireless Earbuds Basic don't charge is because of poor contact, which is that when you use gold patches of headphones and inside the case, you accumulate skin fat, dust and oxides, which creates an insulating film that prevents current from passing.
To fix the problem, you need to gently wipe the contacts with a cotton swab dipped in alcohol or a special cleaner. It is important not to overdo or damage the thin conductors. After cleaning, let the alcohol completely evaporate before installing the headphones in the case.
☑️ Contact diagnosis
Sometimes the problem goes deeper: the spring-loaded contacts in the case itself can become oxidized or clogged from the inside. If you notice that one of the headphones sits faster than the other, check the density of the particular module to the base contacts. Mechanical impact should be minimal.
- 🧼 Carefully clean the ends of the headphones from sulfur and plaque.
- 🔍 Check if the contacts are stuck inside the charging case.
- 🔋 Make sure the case itself is charged from the cable.
- 🚫 Avoid getting moisture inside ports when cleaning.
💡
Use a dry toothbrush to remove villi from the pockets of the case, where the cotton swab is missing.
Problems with cable and power source
External factors affecting charging should not be excluded: cheap micro-USB cables, often included, are prone to fractures at the connector. If the indicator on the case does not light up red when connected, try replacing the cable with a known serviceable one.
Charging from the powerful units (fast charging) of modern smartphones may not activate the controller in a cheap case due to the lack of protocol coordination. USB-port.
Check the micro-USB connector on the case itself. In Xiaomi's budget models, it's often loose-lipped and doesn't provide reliable contact. If the nest wobbles or the cable falls out at the slightest movement, you'll need to solder a new connector in the service.
Why is there no charger from Power Bank?
Deep discharge of headphone batteries
If you didn't use your headphones for a long time and left them dead, you could have a deep discharge. Lithium batteries have a minimum voltage threshold below which the controller blocks charging for safety. The indicators can flash white or not respond at all.
To "swing" these batteries, you need patience. Leave the headphones in the case connected to the charge for a few hours (3 to 6). Sometimes the controller takes time to raise the voltage to the operating level and activate the normal charge mode.
In rare cases, pulse charging, which is a short-term connection and disconnection of the case from the network, is a risky method, which can finally kill the cell. If after 6 hours of charging the indicators do not change color, most likely, the battery life is exhausted.
| Symptoms. | Probable cause | Decision |
|---|---|---|
| The indicator is not on. | Chain break or case discharged | Replace the cable/check the case |
| Blinks red. | Charging error | Clear the contacts. |
| Burning white all the time | Headphones charged or glitched | Do a reset of settings |
| Only one charger. | Contamination of contact | Mechanical cleaning |
💡
Deep discharge is a reversible process, but it takes time.Do not quit charging after 10 minutes unless the indicator lights up immediately.
Program failure and need for resetting
Sometimes the hardware is fine, but the Redmi AirDots software is stuck, and the power controller can misread the charge level by blocking the input current, and then it helps to completely reset to the factory settings.
To perform the reset, place both earbuds in the case and open the lid. Find the hidden reset button (if the model allows) or use the touch areas. On models without a button, remove the headphones, then pinch the sensors on both ears simultaneously for 20-30 seconds before the indication appears.
⚠️ Warning: After reset, the headphones will delete the pairing list. You will have to re-pair the smartphone via the Bluetooth menu, removing the old device.
Reset procedures often solve the problem when one earphone is charging and the other is not, or when the case can't see the modules inserted, and this forcefully resets the microcontrollers inside each ear.
Hardware breakdown and battery wear
If the software methods and cleaning didn't help, there's a hardware malfunction. TWS-Headphones use compact batteries with the capacity of all 40-50 They have a resource of about 300-500 charge-discharge cycles, after which the capacity falls critically.
It could also have caused a failure of the charge controller inside the case or the headphones themselves, which is often the case with low-quality chargers with power surges, and then it would be economically inefficient to repair, because the cost of the work would exceed the cost of the new device.
The sign of battery death is instantaneous discharge: the headphone shows 100%, plays 2 minutes and turns off. Or it charges to 100% in 5 minutes, which is physically impossible for a serviceable battery of such a capacity.
- 📉 Natural Wear of Battery Chemistry Through 1.5-2 year-end.
- ⚡ Voltage surge when charging from a car lighter.
- 💧 Moisture intake and corrosion of the board (even sweat).
- 🔨 Mechanical damage in case fall.
Can I replace the battery myself?
Specificity of Redmi AirDots and Xiaomi models
Redmi AirDots (including Essential, S, 2, 3) has its own design features, such as the first version often left contacts inside the case due to a weak spring. AirDots 2 improved the controller, but added sensitivity to the quality of the cable.
Models with wireless case charging can warm up when charging, which is normal, but overheating above 45 degrees can activate the thermal protection and stop the process.
It is important to note that the indicators on Xiaomi work according to a specific algorithm: red lights up during charge, dims or turns white (depending on the model) at completion. The lack of glow when extracted from the case may mean that the earphone is not “waking up”, not that it is discharged.
⚠️ Warning: Do not try to charge your headphones if they are overheated in the sun or in the winter after frost.